./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/mbpr2.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_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/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_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-tiling/mbpr2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/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_1544b573-e6ba-42e9-8cd9-05f4f2283df1/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 a98ea70d5d9f752732070144a56514c68e9571f139726211e2f0ade721d6c5f3 --- 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 16:18:42,618 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 16:18:42,620 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 16:18:42,638 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 16:18:42,638 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 16:18:42,639 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 16:18:42,641 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 16:18:42,643 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 16:18:42,644 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 16:18:42,645 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 16:18:42,646 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 16:18:42,648 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 16:18:42,648 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 16:18:42,649 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 16:18:42,650 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 16:18:42,652 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 16:18:42,653 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 16:18:42,654 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 16:18:42,655 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 16:18:42,657 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 16:18:42,659 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 16:18:42,660 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 16:18:42,661 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 16:18:42,662 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 16:18:42,665 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 16:18:42,666 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 16:18:42,666 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 16:18:42,675 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 16:18:42,676 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 16:18:42,677 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 16:18:42,678 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 16:18:42,680 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 16:18:42,681 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 16:18:42,683 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 16:18:42,684 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 16:18:42,685 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 16:18:42,686 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 16:18:42,687 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 16:18:42,687 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 16:18:42,688 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 16:18:42,689 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 16:18:42,690 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 16:18:42,713 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 16:18:42,713 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 16:18:42,713 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 16:18:42,714 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 16:18:42,714 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 16:18:42,715 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 16:18:42,715 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 16:18:42,715 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 16:18:42,716 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 16:18:42,716 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 16:18:42,716 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 16:18:42,716 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 16:18:42,717 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 16:18:42,717 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 16:18:42,717 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 16:18:42,718 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 16:18:42,718 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 16:18:42,718 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 16:18:42,719 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 16:18:42,719 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 16:18:42,720 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 16:18:42,720 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 16:18:42,720 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 16:18:42,720 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 16:18:42,721 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 16:18:42,721 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 16:18:42,721 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 16:18:42,721 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 16:18:42,722 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 16:18:42,722 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 16:18:42,722 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 16:18:42,723 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 16:18:42,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 16:18:42,723 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 16:18:42,724 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 16:18:42,724 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 16:18:42,724 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 16:18:42,724 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 16:18:42,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 16:18:42,725 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 16:18:42,725 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 16:18:42,726 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_1544b573-e6ba-42e9-8cd9-05f4f2283df1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a98ea70d5d9f752732070144a56514c68e9571f139726211e2f0ade721d6c5f3 [2022-11-16 16:18:43,064 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 16:18:43,103 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 16:18:43,106 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 16:18:43,107 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 16:18:43,109 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 16:18:43,110 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/array-tiling/mbpr2.c [2022-11-16 16:18:43,189 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/data/65b077e58/1a9d34a12b1449df9f44f878c5b7763f/FLAG314c6a6e0 [2022-11-16 16:18:43,631 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 16:18:43,631 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/sv-benchmarks/c/array-tiling/mbpr2.c [2022-11-16 16:18:43,645 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/data/65b077e58/1a9d34a12b1449df9f44f878c5b7763f/FLAG314c6a6e0 [2022-11-16 16:18:44,056 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/data/65b077e58/1a9d34a12b1449df9f44f878c5b7763f [2022-11-16 16:18:44,060 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 16:18:44,063 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 16:18:44,068 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 16:18:44,068 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 16:18:44,072 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 16:18:44,072 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:18:44" (1/1) ... [2022-11-16 16:18:44,074 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38beac7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:44, skipping insertion in model container [2022-11-16 16:18:44,076 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:18:44" (1/1) ... [2022-11-16 16:18:44,083 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 16:18:44,101 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 16:18:44,327 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_1544b573-e6ba-42e9-8cd9-05f4f2283df1/sv-benchmarks/c/array-tiling/mbpr2.c[396,409] [2022-11-16 16:18:44,360 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 16:18:44,368 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 16:18:44,381 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_1544b573-e6ba-42e9-8cd9-05f4f2283df1/sv-benchmarks/c/array-tiling/mbpr2.c[396,409] [2022-11-16 16:18:44,391 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 16:18:44,404 INFO L208 MainTranslator]: Completed translation [2022-11-16 16:18:44,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:44 WrapperNode [2022-11-16 16:18:44,405 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 16:18:44,406 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 16:18:44,406 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 16:18:44,407 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 16:18:44,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:44" (1/1) ... [2022-11-16 16:18:44,420 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:44" (1/1) ... [2022-11-16 16:18:44,441 INFO L138 Inliner]: procedures = 15, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 91 [2022-11-16 16:18:44,441 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 16:18:44,442 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 16:18:44,442 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 16:18:44,442 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 16:18:44,451 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:44" (1/1) ... [2022-11-16 16:18:44,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:44" (1/1) ... [2022-11-16 16:18:44,474 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:44" (1/1) ... [2022-11-16 16:18:44,474 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:44" (1/1) ... [2022-11-16 16:18:44,479 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:44" (1/1) ... [2022-11-16 16:18:44,491 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:44" (1/1) ... [2022-11-16 16:18:44,492 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:44" (1/1) ... [2022-11-16 16:18:44,494 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:44" (1/1) ... [2022-11-16 16:18:44,495 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 16:18:44,504 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 16:18:44,504 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 16:18:44,504 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 16:18:44,505 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:44" (1/1) ... [2022-11-16 16:18:44,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 16:18:44,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:18:44,540 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 16:18:44,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 16:18:44,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 16:18:44,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 16:18:44,582 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 16:18:44,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 16:18:44,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 16:18:44,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 16:18:44,583 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 16:18:44,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 16:18:44,649 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 16:18:44,652 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 16:18:44,925 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 16:18:45,078 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 16:18:45,078 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-16 16:18:45,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 04:18:45 BoogieIcfgContainer [2022-11-16 16:18:45,081 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 16:18:45,083 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 16:18:45,083 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 16:18:45,087 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 16:18:45,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 04:18:44" (1/3) ... [2022-11-16 16:18:45,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70847d0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 04:18:45, skipping insertion in model container [2022-11-16 16:18:45,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:44" (2/3) ... [2022-11-16 16:18:45,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70847d0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 04:18:45, skipping insertion in model container [2022-11-16 16:18:45,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 04:18:45" (3/3) ... [2022-11-16 16:18:45,090 INFO L112 eAbstractionObserver]: Analyzing ICFG mbpr2.c [2022-11-16 16:18:45,109 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 16:18:45,109 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 16:18:45,158 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 16:18:45,165 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;@7c46922f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 16:18:45,165 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 16:18:45,177 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:45,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 16:18:45,183 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:18:45,183 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:18:45,184 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:18:45,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:18:45,190 INFO L85 PathProgramCache]: Analyzing trace with hash -310329994, now seen corresponding path program 1 times [2022-11-16 16:18:45,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:18:45,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210054095] [2022-11-16 16:18:45,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:18:45,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:18:45,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:18:45,616 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 16:18:45,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:18:45,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210054095] [2022-11-16 16:18:45,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210054095] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:18:45,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:18:45,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 16:18:45,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680937401] [2022-11-16 16:18:45,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:18:45,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:18:45,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:18:45,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:18:45,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:18:45,657 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:45,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:18:45,724 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2022-11-16 16:18:45,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 16:18:45,727 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 16:18:45,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:18:45,736 INFO L225 Difference]: With dead ends: 27 [2022-11-16 16:18:45,736 INFO L226 Difference]: Without dead ends: 12 [2022-11-16 16:18:45,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 16:18:45,742 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 16 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 16:18:45,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 12 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 16:18:45,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-16 16:18:45,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-16 16:18:45,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 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 16:18:45,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2022-11-16 16:18:45,778 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 8 [2022-11-16 16:18:45,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:18:45,779 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2022-11-16 16:18:45,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:45,780 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2022-11-16 16:18:45,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 16:18:45,781 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:18:45,781 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:18:45,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 16:18:45,782 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:18:45,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:18:45,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1590608285, now seen corresponding path program 1 times [2022-11-16 16:18:45,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:18:45,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165039657] [2022-11-16 16:18:45,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:18:45,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:18:45,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:18:46,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 16:18:46,527 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.InterpolantChecker.checkInductivity(InterpolantChecker.java:409) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.walkLeafNode(Interpolator.java:383) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator$ProofTreeWalker.walk(Interpolator.java:154) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.interpolate(Interpolator.java:260) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:237) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:848) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:776) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:343) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:343) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:198) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:282) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:165) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsTree(InterpolatingTraceCheckCraig.java:296) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:232) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 16:18:46,538 INFO L158 Benchmark]: Toolchain (without parser) took 2474.49ms. Allocated memory is still 140.5MB. Free memory was 104.3MB in the beginning and 56.1MB in the end (delta: 48.2MB). Peak memory consumption was 53.3MB. Max. memory is 16.1GB. [2022-11-16 16:18:46,543 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 140.5MB. Free memory is still 120.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 16:18:46,543 INFO L158 Benchmark]: CACSL2BoogieTranslator took 337.73ms. Allocated memory is still 140.5MB. Free memory was 104.1MB in the beginning and 116.5MB in the end (delta: -12.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-16 16:18:46,544 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.16ms. Allocated memory is still 140.5MB. Free memory was 116.5MB in the beginning and 114.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 16:18:46,544 INFO L158 Benchmark]: Boogie Preprocessor took 61.10ms. Allocated memory is still 140.5MB. Free memory was 114.4MB in the beginning and 113.0MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 16:18:46,544 INFO L158 Benchmark]: RCFGBuilder took 577.13ms. Allocated memory is still 140.5MB. Free memory was 113.0MB in the beginning and 96.3MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-16 16:18:46,545 INFO L158 Benchmark]: TraceAbstraction took 1453.61ms. Allocated memory is still 140.5MB. Free memory was 95.5MB in the beginning and 56.1MB in the end (delta: 39.4MB). Peak memory consumption was 45.5MB. Max. memory is 16.1GB. [2022-11-16 16:18:46,547 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 140.5MB. Free memory is still 120.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 337.73ms. Allocated memory is still 140.5MB. Free memory was 104.1MB in the beginning and 116.5MB in the end (delta: -12.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.16ms. Allocated memory is still 140.5MB. Free memory was 116.5MB in the beginning and 114.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 61.10ms. Allocated memory is still 140.5MB. Free memory was 114.4MB in the beginning and 113.0MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 577.13ms. Allocated memory is still 140.5MB. Free memory was 113.0MB in the beginning and 96.3MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 1453.61ms. Allocated memory is still 140.5MB. Free memory was 95.5MB in the beginning and 56.1MB in the end (delta: 39.4MB). Peak memory consumption was 45.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: null: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.InterpolantChecker.checkInductivity(InterpolantChecker.java:409) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-16 16:18:46,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/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_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-tiling/mbpr2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/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 a98ea70d5d9f752732070144a56514c68e9571f139726211e2f0ade721d6c5f3 --- 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 16:18:48,806 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 16:18:48,808 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 16:18:48,842 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 16:18:48,842 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 16:18:48,843 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 16:18:48,845 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 16:18:48,847 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 16:18:48,848 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 16:18:48,849 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 16:18:48,850 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 16:18:48,852 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 16:18:48,852 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 16:18:48,853 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 16:18:48,855 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 16:18:48,856 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 16:18:48,857 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 16:18:48,858 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 16:18:48,860 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 16:18:48,862 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 16:18:48,864 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 16:18:48,871 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 16:18:48,873 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 16:18:48,873 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 16:18:48,877 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 16:18:48,877 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 16:18:48,878 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 16:18:48,879 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 16:18:48,879 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 16:18:48,880 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 16:18:48,881 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 16:18:48,881 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 16:18:48,882 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 16:18:48,883 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 16:18:48,884 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 16:18:48,884 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 16:18:48,885 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 16:18:48,886 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 16:18:48,886 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 16:18:48,887 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 16:18:48,888 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 16:18:48,889 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-16 16:18:48,913 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 16:18:48,913 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 16:18:48,913 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 16:18:48,914 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 16:18:48,914 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 16:18:48,915 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 16:18:48,915 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 16:18:48,915 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 16:18:48,915 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 16:18:48,916 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 16:18:48,916 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 16:18:48,916 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 16:18:48,917 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 16:18:48,917 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 16:18:48,917 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 16:18:48,918 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 16:18:48,918 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 16:18:48,918 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 16:18:48,918 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 16:18:48,919 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 16:18:48,919 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-16 16:18:48,919 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-16 16:18:48,919 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 16:18:48,920 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 16:18:48,920 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 16:18:48,920 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 16:18:48,920 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 16:18:48,921 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 16:18:48,921 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 16:18:48,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 16:18:48,921 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 16:18:48,922 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 16:18:48,922 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 16:18:48,922 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-16 16:18:48,922 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-16 16:18:48,923 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 16:18:48,923 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 16:18:48,924 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-16 16:18:48,924 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a98ea70d5d9f752732070144a56514c68e9571f139726211e2f0ade721d6c5f3 [2022-11-16 16:18:49,262 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 16:18:49,290 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 16:18:49,293 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 16:18:49,294 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 16:18:49,295 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 16:18:49,297 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/array-tiling/mbpr2.c [2022-11-16 16:18:49,387 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/data/04fc3de39/cdd46d8151804c5180a78a3ecce19ec4/FLAG980d3d8d2 [2022-11-16 16:18:49,872 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 16:18:49,872 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/sv-benchmarks/c/array-tiling/mbpr2.c [2022-11-16 16:18:49,879 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/data/04fc3de39/cdd46d8151804c5180a78a3ecce19ec4/FLAG980d3d8d2 [2022-11-16 16:18:50,255 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/data/04fc3de39/cdd46d8151804c5180a78a3ecce19ec4 [2022-11-16 16:18:50,257 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 16:18:50,258 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 16:18:50,260 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 16:18:50,261 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 16:18:50,270 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 16:18:50,271 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:18:50" (1/1) ... [2022-11-16 16:18:50,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4806bd6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:50, skipping insertion in model container [2022-11-16 16:18:50,273 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:18:50" (1/1) ... [2022-11-16 16:18:50,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 16:18:50,304 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 16:18:50,454 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_1544b573-e6ba-42e9-8cd9-05f4f2283df1/sv-benchmarks/c/array-tiling/mbpr2.c[396,409] [2022-11-16 16:18:50,489 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 16:18:50,501 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 16:18:50,556 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_1544b573-e6ba-42e9-8cd9-05f4f2283df1/sv-benchmarks/c/array-tiling/mbpr2.c[396,409] [2022-11-16 16:18:50,579 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 16:18:50,594 INFO L208 MainTranslator]: Completed translation [2022-11-16 16:18:50,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:50 WrapperNode [2022-11-16 16:18:50,595 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 16:18:50,596 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 16:18:50,596 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 16:18:50,596 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 16:18:50,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:50" (1/1) ... [2022-11-16 16:18:50,624 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:50" (1/1) ... [2022-11-16 16:18:50,659 INFO L138 Inliner]: procedures = 17, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 90 [2022-11-16 16:18:50,659 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 16:18:50,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 16:18:50,662 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 16:18:50,662 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 16:18:50,671 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:50" (1/1) ... [2022-11-16 16:18:50,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:50" (1/1) ... [2022-11-16 16:18:50,680 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:50" (1/1) ... [2022-11-16 16:18:50,681 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:50" (1/1) ... [2022-11-16 16:18:50,698 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:50" (1/1) ... [2022-11-16 16:18:50,702 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:50" (1/1) ... [2022-11-16 16:18:50,703 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:50" (1/1) ... [2022-11-16 16:18:50,704 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:50" (1/1) ... [2022-11-16 16:18:50,711 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 16:18:50,715 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 16:18:50,718 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 16:18:50,718 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 16:18:50,719 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:50" (1/1) ... [2022-11-16 16:18:50,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 16:18:50,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:18:50,757 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 16:18:50,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 16:18:50,805 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 16:18:50,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-16 16:18:50,806 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 16:18:50,806 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-16 16:18:50,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 16:18:50,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 16:18:50,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-16 16:18:50,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 16:18:50,914 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 16:18:50,916 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 16:18:51,290 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 16:18:51,296 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 16:18:51,297 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-16 16:18:51,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 04:18:51 BoogieIcfgContainer [2022-11-16 16:18:51,299 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 16:18:51,318 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 16:18:51,319 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 16:18:51,322 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 16:18:51,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 04:18:50" (1/3) ... [2022-11-16 16:18:51,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b90e6cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 04:18:51, skipping insertion in model container [2022-11-16 16:18:51,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:18:50" (2/3) ... [2022-11-16 16:18:51,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b90e6cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 04:18:51, skipping insertion in model container [2022-11-16 16:18:51,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 04:18:51" (3/3) ... [2022-11-16 16:18:51,325 INFO L112 eAbstractionObserver]: Analyzing ICFG mbpr2.c [2022-11-16 16:18:51,346 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 16:18:51,346 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 16:18:51,401 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 16:18:51,411 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;@7a0bd52c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 16:18:51,411 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 16:18:51,417 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 28 states have internal predecessors, (41), 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 16:18:51,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:18:51,425 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:18:51,425 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:18:51,427 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:18:51,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:18:51,436 INFO L85 PathProgramCache]: Analyzing trace with hash -669443655, now seen corresponding path program 1 times [2022-11-16 16:18:51,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:18:51,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [583287489] [2022-11-16 16:18:51,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:18:51,453 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:18:51,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:18:51,459 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 16:18:51,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-16 16:18:51,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:18:51,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-16 16:18:51,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:18:51,588 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 16:18:51,588 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:18:51,589 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:18:51,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [583287489] [2022-11-16 16:18:51,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [583287489] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:18:51,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:18:51,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 16:18:51,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079501771] [2022-11-16 16:18:51,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:18:51,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 16:18:51,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:18:51,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 16:18:51,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 16:18:51,643 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:51,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:18:51,665 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2022-11-16 16:18:51,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 16:18:51,668 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 16:18:51,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:18:51,683 INFO L225 Difference]: With dead ends: 53 [2022-11-16 16:18:51,684 INFO L226 Difference]: Without dead ends: 24 [2022-11-16 16:18:51,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 16:18:51,695 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 16:18:51,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 16:18:51,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-16 16:18:51,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-16 16:18:51,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:51,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-11-16 16:18:51,730 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 15 [2022-11-16 16:18:51,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:18:51,731 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-11-16 16:18:51,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:51,731 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-11-16 16:18:51,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:18:51,732 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:18:51,732 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:18:51,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-16 16:18:51,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:18:51,944 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:18:51,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:18:51,945 INFO L85 PathProgramCache]: Analyzing trace with hash -893920799, now seen corresponding path program 1 times [2022-11-16 16:18:51,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:18:51,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [750315836] [2022-11-16 16:18:51,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:18:51,946 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:18:51,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:18:51,947 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 16:18:51,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-16 16:18:52,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:18:52,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 16:18:52,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:18:52,173 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 16:18:52,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:18:52,174 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:18:52,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [750315836] [2022-11-16 16:18:52,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [750315836] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:18:52,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:18:52,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 16:18:52,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718455563] [2022-11-16 16:18:52,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:18:52,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:18:52,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:18:52,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:18:52,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:18:52,177 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:52,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:18:52,457 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2022-11-16 16:18:52,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 16:18:52,458 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 16:18:52,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:18:52,459 INFO L225 Difference]: With dead ends: 46 [2022-11-16 16:18:52,459 INFO L226 Difference]: Without dead ends: 32 [2022-11-16 16:18:52,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 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 16:18:52,461 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 33 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 16:18:52,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 22 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 16:18:52,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-16 16:18:52,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2022-11-16 16:18:52,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:52,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-11-16 16:18:52,467 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 15 [2022-11-16 16:18:52,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:18:52,467 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-11-16 16:18:52,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:52,468 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-11-16 16:18:52,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-16 16:18:52,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:18:52,469 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:18:52,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-16 16:18:52,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:18:52,670 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:18:52,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:18:52,670 INFO L85 PathProgramCache]: Analyzing trace with hash -816010793, now seen corresponding path program 1 times [2022-11-16 16:18:52,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:18:52,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [333343844] [2022-11-16 16:18:52,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:18:52,671 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:18:52,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:18:52,672 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 16:18:52,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-16 16:18:52,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:18:52,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 16:18:52,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:18:52,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:18:52,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:18:52,871 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:18:52,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [333343844] [2022-11-16 16:18:52,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [333343844] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:18:52,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:18:52,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:18:52,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877201212] [2022-11-16 16:18:52,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:18:52,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:18:52,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:18:52,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:18:52,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:18:52,874 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:52,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:18:52,899 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2022-11-16 16:18:52,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:18:52,900 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-16 16:18:52,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:18:52,901 INFO L225 Difference]: With dead ends: 39 [2022-11-16 16:18:52,901 INFO L226 Difference]: Without dead ends: 26 [2022-11-16 16:18:52,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 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 16:18:52,903 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 16:18:52,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 25 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 16:18:52,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-16 16:18:52,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-16 16:18:52,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:52,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-11-16 16:18:52,910 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 23 [2022-11-16 16:18:52,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:18:52,911 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-11-16 16:18:52,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:52,911 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-11-16 16:18:52,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-16 16:18:52,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:18:52,912 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:18:52,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-16 16:18:53,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:18:53,124 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:18:53,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:18:53,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1209037803, now seen corresponding path program 1 times [2022-11-16 16:18:53,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:18:53,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [32184657] [2022-11-16 16:18:53,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:18:53,126 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:18:53,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:18:53,128 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 16:18:53,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-16 16:18:53,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:18:53,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 16:18:53,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:18:53,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:18:53,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:18:53,286 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:18:53,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [32184657] [2022-11-16 16:18:53,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [32184657] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:18:53,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:18:53,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 16:18:53,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015559563] [2022-11-16 16:18:53,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:18:53,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:18:53,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:18:53,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:18:53,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:18:53,289 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:53,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:18:53,350 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2022-11-16 16:18:53,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 16:18:53,351 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-16 16:18:53,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:18:53,352 INFO L225 Difference]: With dead ends: 36 [2022-11-16 16:18:53,352 INFO L226 Difference]: Without dead ends: 34 [2022-11-16 16:18:53,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 16:18:53,354 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 8 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 16:18:53,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 76 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 16:18:53,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-16 16:18:53,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2022-11-16 16:18:53,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 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 16:18:53,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-11-16 16:18:53,362 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 23 [2022-11-16 16:18:53,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:18:53,362 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-11-16 16:18:53,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:53,363 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-11-16 16:18:53,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-16 16:18:53,363 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:18:53,363 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:18:53,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-16 16:18:53,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:18:53,575 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:18:53,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:18:53,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1208978221, now seen corresponding path program 1 times [2022-11-16 16:18:53,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:18:53,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [742632667] [2022-11-16 16:18:53,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:18:53,577 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:18:53,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:18:53,578 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 16:18:53,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-16 16:18:53,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:18:53,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 16:18:53,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:18:53,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 16:18:53,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:18:53,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 16:18:53,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 16:18:54,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-16 16:18:54,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-16 16:18:54,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:18:54,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:18:54,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 16:18:54,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-16 16:18:54,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:18:54,518 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:18:54,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [742632667] [2022-11-16 16:18:54,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [742632667] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:18:54,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [717917922] [2022-11-16 16:18:54,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:18:54,519 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:18:54,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:18:54,526 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:18:54,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-16 16:18:54,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:18:54,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 16:18:54,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:18:54,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 16:18:54,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:18:54,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 16:18:54,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 16:18:54,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-16 16:18:54,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-16 16:18:54,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:18:54,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:18:55,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 16:18:55,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-16 16:18:55,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:18:55,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [717917922] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:18:55,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062870037] [2022-11-16 16:18:55,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:18:55,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:18:55,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:18:55,314 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:18:55,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 16:18:55,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:18:55,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 16:18:55,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:18:55,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 16:18:55,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:18:55,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 16:18:55,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 16:18:55,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-16 16:18:55,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-16 16:18:55,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:18:55,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:18:55,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 16:18:55,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-16 16:18:55,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:18:55,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062870037] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:18:55,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:18:55,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8, 7, 8, 7] total 12 [2022-11-16 16:18:55,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171511457] [2022-11-16 16:18:55,997 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:18:55,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 16:18:55,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:18:55,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 16:18:55,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-16 16:18:55,998 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 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 16:18:56,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:18:56,613 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2022-11-16 16:18:56,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 16:18:56,616 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 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 23 [2022-11-16 16:18:56,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:18:56,617 INFO L225 Difference]: With dead ends: 73 [2022-11-16 16:18:56,617 INFO L226 Difference]: Without dead ends: 52 [2022-11-16 16:18:56,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 109 SyntacticMatches, 13 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-16 16:18:56,619 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 105 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 16:18:56,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 69 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 16:18:56,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-16 16:18:56,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 30. [2022-11-16 16:18:56,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:56,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-11-16 16:18:56,629 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 23 [2022-11-16 16:18:56,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:18:56,630 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-11-16 16:18:56,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 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 16:18:56,630 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-11-16 16:18:56,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-16 16:18:56,631 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:18:56,631 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:18:56,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-16 16:18:56,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-16 16:18:57,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-16 16:18:57,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:18:57,243 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:18:57,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:18:57,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1368311994, now seen corresponding path program 1 times [2022-11-16 16:18:57,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:18:57,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [500291652] [2022-11-16 16:18:57,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:18:57,244 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:18:57,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:18:57,249 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 16:18:57,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-16 16:18:57,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:18:57,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:18:57,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:18:57,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 16:18:57,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:18:57,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 16:18:57,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:18:57,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:18:57,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-16 16:18:57,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-16 16:18:57,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:18:57,914 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:18:57,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [500291652] [2022-11-16 16:18:57,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [500291652] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:18:57,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1100467398] [2022-11-16 16:18:57,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:18:57,915 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:18:57,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:18:57,922 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:18:57,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-16 16:18:58,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:18:58,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 16:18:58,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:18:58,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 16:18:58,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:18:58,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 16:18:58,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:18:58,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:18:58,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-16 16:18:58,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-16 16:18:58,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:18:58,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1100467398] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:18:58,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616464274] [2022-11-16 16:18:58,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:18:58,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:18:58,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:18:58,487 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:18:58,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 16:18:58,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:18:58,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 16:18:58,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:18:58,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 16:18:58,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:18:58,703 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 21 treesize of output 20 [2022-11-16 16:18:58,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:18:58,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:18:58,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-16 16:18:58,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-16 16:18:58,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:18:58,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616464274] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:18:58,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:18:58,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9, 8, 10, 8] total 15 [2022-11-16 16:18:58,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270375150] [2022-11-16 16:18:58,993 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:18:58,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 16:18:58,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:18:58,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 16:18:58,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-11-16 16:18:58,994 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:59,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:18:59,830 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2022-11-16 16:18:59,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 16:18:59,831 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-16 16:18:59,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:18:59,832 INFO L225 Difference]: With dead ends: 56 [2022-11-16 16:18:59,832 INFO L226 Difference]: Without dead ends: 54 [2022-11-16 16:18:59,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 150 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=199, Invalid=557, Unknown=0, NotChecked=0, Total=756 [2022-11-16 16:18:59,834 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 205 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 16:18:59,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 77 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 16:18:59,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-16 16:18:59,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 36. [2022-11-16 16:18:59,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 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 16:18:59,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-11-16 16:18:59,843 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 29 [2022-11-16 16:18:59,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:18:59,844 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-11-16 16:18:59,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:18:59,844 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-11-16 16:18:59,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-16 16:18:59,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:18:59,845 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:18:59,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2022-11-16 16:19:00,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-11-16 16:19:00,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 16:19:00,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:19:00,448 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:19:00,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:19:00,449 INFO L85 PathProgramCache]: Analyzing trace with hash 21305209, now seen corresponding path program 2 times [2022-11-16 16:19:00,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:19:00,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1568966138] [2022-11-16 16:19:00,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:19:00,449 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:19:00,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:19:00,450 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 16:19:00,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-16 16:19:00,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:19:00,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:19:00,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 16:19:00,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:19:03,733 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:19:03,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:19:05,743 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:19:05,743 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:19:05,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1568966138] [2022-11-16 16:19:05,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1568966138] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:19:05,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [116203582] [2022-11-16 16:19:05,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:19:05,744 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:19:05,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:19:05,746 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:19:05,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-16 16:19:05,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:19:05,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:19:05,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 16:19:05,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:19:07,765 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:19:07,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:19:08,240 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:19:08,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [116203582] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:19:08,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015978816] [2022-11-16 16:19:08,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:19:08,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:19:08,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:19:08,250 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:19:08,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 16:19:08,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:19:08,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:19:08,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 16:19:08,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:19:10,106 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:19:10,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:19:10,608 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:19:10,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015978816] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:19:10,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:19:10,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10, 9, 10, 9] total 17 [2022-11-16 16:19:10,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101758245] [2022-11-16 16:19:10,609 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:19:10,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 16:19:10,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:19:10,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 16:19:10,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-11-16 16:19:10,611 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:19:12,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:19:12,961 INFO L93 Difference]: Finished difference Result 97 states and 108 transitions. [2022-11-16 16:19:12,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 16:19:12,966 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-16 16:19:12,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:19:12,967 INFO L225 Difference]: With dead ends: 97 [2022-11-16 16:19:12,967 INFO L226 Difference]: Without dead ends: 54 [2022-11-16 16:19:12,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-11-16 16:19:12,968 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 149 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 16:19:12,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 95 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-16 16:19:12,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-16 16:19:12,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 44. [2022-11-16 16:19:12,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:19:12,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2022-11-16 16:19:12,978 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 35 [2022-11-16 16:19:12,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:19:12,979 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2022-11-16 16:19:12,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:19:12,979 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2022-11-16 16:19:12,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-16 16:19:12,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:19:12,980 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:19:12,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 16:19:13,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2022-11-16 16:19:13,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-16 16:19:13,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:19:13,591 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:19:13,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:19:13,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1279882925, now seen corresponding path program 3 times [2022-11-16 16:19:13,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:19:13,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1776734567] [2022-11-16 16:19:13,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:19:13,593 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:19:13,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:19:13,593 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 16:19:13,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-16 16:19:13,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 16:19:13,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:19:13,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 16:19:13,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:19:13,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 16:19:13,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 16:19:13,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:13,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 16:19:13,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 16:19:14,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-16 16:19:14,134 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 16:19:14,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:19:14,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-16 16:19:14,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2022-11-16 16:19:14,997 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 16:19:14,998 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:19:14,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1776734567] [2022-11-16 16:19:14,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1776734567] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:19:14,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1320066778] [2022-11-16 16:19:14,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:19:14,998 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:19:14,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:19:14,999 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:19:15,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-16 16:19:15,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 16:19:15,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:19:15,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-16 16:19:15,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:19:15,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 16:19:15,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 16:19:15,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:15,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 16:19:15,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:15,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 16:19:15,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 16:19:15,882 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 16:19:15,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 25 [2022-11-16 16:19:16,467 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:19:16,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:19:17,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2022-11-16 16:19:17,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-11-16 16:19:18,451 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:19:18,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1320066778] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:19:18,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313194190] [2022-11-16 16:19:18,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:19:18,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:19:18,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:19:18,455 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:19:18,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 16:19:18,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 16:19:18,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:19:18,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 16:19:18,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:19:18,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 16:19:18,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 16:19:18,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:19:18,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 16:19:18,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 16:19:18,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-16 16:19:18,961 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:19:18,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:19:19,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-16 16:19:19,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2022-11-16 16:19:19,555 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 16:19:19,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313194190] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:19:19,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:19:19,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 13, 13, 9, 10] total 38 [2022-11-16 16:19:19,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056464768] [2022-11-16 16:19:19,556 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:19:19,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-16 16:19:19,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:19:19,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-16 16:19:19,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1231, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 16:19:19,558 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 38 states have internal predecessors, (147), 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 16:19:44,958 WARN L233 SmtUtils]: Spent 12.12s on a formula simplification. DAG size of input: 37 DAG size of output: 36 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 16:19:47,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:19:47,511 INFO L93 Difference]: Finished difference Result 130 states and 145 transitions. [2022-11-16 16:19:47,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-16 16:19:47,515 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 38 states have internal predecessors, (147), 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 43 [2022-11-16 16:19:47,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:19:47,516 INFO L225 Difference]: With dead ends: 130 [2022-11-16 16:19:47,516 INFO L226 Difference]: Without dead ends: 120 [2022-11-16 16:19:47,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 210 SyntacticMatches, 14 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2254 ImplicationChecksByTransitivity, 29.7s TimeCoverageRelationStatistics Valid=883, Invalid=5597, Unknown=0, NotChecked=0, Total=6480 [2022-11-16 16:19:47,519 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 362 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 244 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 16:19:47,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 294 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 621 Invalid, 0 Unknown, 244 Unchecked, 1.4s Time] [2022-11-16 16:19:47,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-16 16:19:47,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 88. [2022-11-16 16:19:47,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0919540229885059) internal successors, (95), 87 states have internal predecessors, (95), 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 16:19:47,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2022-11-16 16:19:47,558 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 43 [2022-11-16 16:19:47,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:19:47,559 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2022-11-16 16:19:47,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 38 states have internal predecessors, (147), 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 16:19:47,559 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2022-11-16 16:19:47,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-16 16:19:47,568 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:19:47,568 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:19:47,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-11-16 16:19:47,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-11-16 16:19:47,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 16:19:48,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:19:48,181 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:19:48,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:19:48,181 INFO L85 PathProgramCache]: Analyzing trace with hash -984603497, now seen corresponding path program 4 times [2022-11-16 16:19:48,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:19:48,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1987295805] [2022-11-16 16:19:48,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 16:19:48,182 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:19:48,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:19:48,183 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 16:19:48,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-16 16:19:48,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 16:19:48,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:19:48,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 16:19:48,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:19:50,888 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 16:19:50,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:19:54,508 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 16:19:54,508 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:19:54,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1987295805] [2022-11-16 16:19:54,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1987295805] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:19:54,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1757679858] [2022-11-16 16:19:54,509 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 16:19:54,509 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:19:54,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:19:54,511 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:19:54,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-16 16:19:54,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 16:19:54,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:19:54,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 16:19:54,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:19:56,001 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 16:19:56,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:19:58,971 WARN L833 $PredicateComparison]: unable to prove that (forall ((~CELLCOUNT~0 (_ BitVec 32))) (let ((.cse0 (bvsdiv ~CELLCOUNT~0 (_ bv2 32)))) (or (not (bvsle (_ bv3 32) .cse0)) (bvsle (bvadd (_ bv2 32) |c_ULTIMATE.start_main_~i~0#1|) .cse0) (not (bvsle (bvadd (_ bv1 32) |c_ULTIMATE.start_main_~i~0#1|) .cse0))))) is different from false [2022-11-16 16:19:58,992 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 2 not checked. [2022-11-16 16:19:58,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1757679858] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:19:58,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148791121] [2022-11-16 16:19:58,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 16:19:58,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:19:58,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:19:58,993 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:19:59,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 16:19:59,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 16:19:59,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:19:59,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 16:19:59,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:20:00,024 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 16:20:00,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:20:00,998 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 16:20:00,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148791121] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:20:00,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:20:00,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 11, 11, 10] total 21 [2022-11-16 16:20:00,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695933185] [2022-11-16 16:20:00,998 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:20:00,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 16:20:00,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:20:00,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 16:20:01,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=277, Unknown=1, NotChecked=36, Total=420 [2022-11-16 16:20:01,000 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 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 16:20:06,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:20:06,135 INFO L93 Difference]: Finished difference Result 161 states and 176 transitions. [2022-11-16 16:20:06,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 16:20:06,139 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 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 53 [2022-11-16 16:20:06,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:20:06,140 INFO L225 Difference]: With dead ends: 161 [2022-11-16 16:20:06,140 INFO L226 Difference]: Without dead ends: 119 [2022-11-16 16:20:06,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 292 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=153, Invalid=402, Unknown=1, NotChecked=44, Total=600 [2022-11-16 16:20:06,141 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 175 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-16 16:20:06,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 100 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 288 Invalid, 0 Unknown, 67 Unchecked, 3.0s Time] [2022-11-16 16:20:06,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-16 16:20:06,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 102. [2022-11-16 16:20:06,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0891089108910892) internal successors, (110), 101 states have internal predecessors, (110), 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 16:20:06,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 110 transitions. [2022-11-16 16:20:06,168 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 110 transitions. Word has length 53 [2022-11-16 16:20:06,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:20:06,168 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 110 transitions. [2022-11-16 16:20:06,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 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 16:20:06,169 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 110 transitions. [2022-11-16 16:20:06,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-16 16:20:06,170 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:20:06,170 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:20:06,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-16 16:20:06,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-16 16:20:06,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-11-16 16:20:06,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:20:06,773 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:20:06,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:20:06,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1817606607, now seen corresponding path program 5 times [2022-11-16 16:20:06,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:20:06,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [40247316] [2022-11-16 16:20:06,774 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 16:20:06,774 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:20:06,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:20:06,775 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 16:20:06,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-16 16:20:06,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-16 16:20:06,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:20:06,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 16:20:06,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:20:12,922 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:20:12,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:20:17,662 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:20:17,662 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:20:17,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [40247316] [2022-11-16 16:20:17,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [40247316] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:20:17,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [216758844] [2022-11-16 16:20:17,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 16:20:17,663 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:20:17,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:20:17,664 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:20:17,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-16 16:20:18,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-16 16:20:18,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:20:18,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:20:18,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:20:21,447 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:20:21,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:20:22,622 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:20:22,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [216758844] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:20:22,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310510151] [2022-11-16 16:20:22,622 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 16:20:22,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:20:22,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:20:22,625 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:20:22,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-16 16:20:22,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-16 16:20:22,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:20:22,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 16:20:22,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:20:26,279 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:20:26,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:20:27,359 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 16:20:27,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310510151] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:20:27,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:20:27,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14, 13, 14, 13] total 25 [2022-11-16 16:20:27,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740596168] [2022-11-16 16:20:27,360 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:20:27,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-16 16:20:27,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:20:27,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-16 16:20:27,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2022-11-16 16:20:27,362 INFO L87 Difference]: Start difference. First operand 102 states and 110 transitions. Second operand has 25 states, 25 states have (on average 3.84) internal successors, (96), 25 states have internal predecessors, (96), 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 16:20:32,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:20:32,794 INFO L93 Difference]: Finished difference Result 124 states and 133 transitions. [2022-11-16 16:20:32,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 16:20:32,798 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.84) internal successors, (96), 25 states have internal predecessors, (96), 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 55 [2022-11-16 16:20:32,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:20:32,799 INFO L225 Difference]: With dead ends: 124 [2022-11-16 16:20:32,799 INFO L226 Difference]: Without dead ends: 78 [2022-11-16 16:20:32,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 300 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=225, Invalid=587, Unknown=0, NotChecked=0, Total=812 [2022-11-16 16:20:32,800 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 366 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-16 16:20:32,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 163 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-16 16:20:32,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-16 16:20:32,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2022-11-16 16:20:32,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1) internal successors, (77), 70 states have internal predecessors, (77), 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 16:20:32,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2022-11-16 16:20:32,817 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 55 [2022-11-16 16:20:32,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:20:32,818 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2022-11-16 16:20:32,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.84) internal successors, (96), 25 states have internal predecessors, (96), 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 16:20:32,818 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2022-11-16 16:20:32,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-16 16:20:32,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:20:32,819 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:20:32,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-16 16:20:33,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-16 16:20:33,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2022-11-16 16:20:33,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:20:33,423 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:20:33,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:20:33,423 INFO L85 PathProgramCache]: Analyzing trace with hash 399273106, now seen corresponding path program 6 times [2022-11-16 16:20:33,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:20:33,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [170382542] [2022-11-16 16:20:33,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 16:20:33,424 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:20:33,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:20:33,425 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 16:20:33,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-16 16:20:33,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-16 16:20:33,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:20:33,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 16:20:33,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:20:33,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 16:20:33,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 16:20:33,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 16:20:33,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 16:20:34,116 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 16:20:34,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:20:34,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-11-16 16:20:34,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 114 [2022-11-16 16:20:34,929 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 16:20:34,929 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:20:34,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [170382542] [2022-11-16 16:20:34,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [170382542] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:20:34,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1012152154] [2022-11-16 16:20:34,930 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 16:20:34,930 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:20:34,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:20:34,931 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:20:34,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-16 16:20:35,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-16 16:20:35,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:20:35,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 16:20:35,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:20:35,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 16:20:35,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 16:20:35,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 16:20:35,520 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 16:20:35,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-11-16 16:20:36,017 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:20:36,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:20:36,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-11-16 16:20:36,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2022-11-16 16:20:36,640 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 16:20:36,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1012152154] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:20:36,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015769247] [2022-11-16 16:20:36,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 16:20:36,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:20:36,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:20:36,643 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:20:36,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-16 16:20:36,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-16 16:20:36,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:20:36,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-16 16:20:36,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:20:37,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 16:20:37,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 16:20:37,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 16:20:37,119 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 16:20:37,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-11-16 16:20:37,449 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:20:37,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:20:37,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-11-16 16:20:37,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2022-11-16 16:20:37,840 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 16:20:37,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015769247] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:20:37,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:20:37,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 14, 13, 15, 13] total 32 [2022-11-16 16:20:37,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478839907] [2022-11-16 16:20:37,841 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:20:37,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-16 16:20:37,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:20:37,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-16 16:20:37,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2022-11-16 16:20:37,843 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand has 32 states, 32 states have (on average 4.4375) internal successors, (142), 32 states have internal predecessors, (142), 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 16:20:42,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:20:42,318 INFO L93 Difference]: Finished difference Result 174 states and 194 transitions. [2022-11-16 16:20:42,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-16 16:20:42,318 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.4375) internal successors, (142), 32 states have internal predecessors, (142), 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 57 [2022-11-16 16:20:42,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:20:42,319 INFO L225 Difference]: With dead ends: 174 [2022-11-16 16:20:42,319 INFO L226 Difference]: Without dead ends: 172 [2022-11-16 16:20:42,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 304 SyntacticMatches, 11 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2442 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1056, Invalid=6084, Unknown=0, NotChecked=0, Total=7140 [2022-11-16 16:20:42,321 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 377 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 16:20:42,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 291 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 734 Invalid, 0 Unknown, 219 Unchecked, 1.3s Time] [2022-11-16 16:20:42,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-16 16:20:42,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 97. [2022-11-16 16:20:42,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.125) internal successors, (108), 96 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:20:42,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 108 transitions. [2022-11-16 16:20:42,340 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 108 transitions. Word has length 57 [2022-11-16 16:20:42,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:20:42,340 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 108 transitions. [2022-11-16 16:20:42,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.4375) internal successors, (142), 32 states have internal predecessors, (142), 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 16:20:42,340 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 108 transitions. [2022-11-16 16:20:42,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-16 16:20:42,341 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:20:42,341 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:20:42,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-11-16 16:20:42,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-16 16:20:42,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-16 16:20:42,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:20:42,944 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:20:42,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:20:42,945 INFO L85 PathProgramCache]: Analyzing trace with hash 419308485, now seen corresponding path program 7 times [2022-11-16 16:20:42,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:20:42,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1953484893] [2022-11-16 16:20:42,945 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 16:20:42,946 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:20:42,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:20:42,971 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 16:20:42,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-16 16:20:43,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:20:43,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 16:20:43,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:20:43,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 16:20:43,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 16:20:43,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 16:20:43,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 16:20:43,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-16 16:20:43,782 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 26 proven. 48 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 16:20:43,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:20:44,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-16 16:20:44,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 130 [2022-11-16 16:20:44,991 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-16 16:20:44,991 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:20:44,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1953484893] [2022-11-16 16:20:44,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1953484893] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:20:44,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [915415702] [2022-11-16 16:20:44,992 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 16:20:44,992 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:20:44,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:20:44,993 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:20:44,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-16 16:20:45,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:20:45,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 16:20:45,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:20:45,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 16:20:45,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 16:20:45,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 16:20:45,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 16:20:46,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-16 16:20:46,011 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 26 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:20:46,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:20:46,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-16 16:20:46,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2022-11-16 16:20:46,653 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-16 16:20:46,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [915415702] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:20:46,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578460067] [2022-11-16 16:20:46,654 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 16:20:46,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:20:46,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:20:46,655 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:20:46,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-16 16:20:46,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:20:46,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 16:20:46,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:20:46,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 16:20:46,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 16:20:47,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 16:20:47,111 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 16:20:47,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-11-16 16:20:47,684 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 16:20:47,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 20 [2022-11-16 16:20:47,688 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 26 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:20:47,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:20:48,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-16 16:20:48,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2022-11-16 16:20:48,696 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-16 16:20:48,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578460067] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:20:48,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:20:48,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11, 13, 13, 13] total 30 [2022-11-16 16:20:48,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882919051] [2022-11-16 16:20:48,697 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:20:48,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-16 16:20:48,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:20:48,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-16 16:20:48,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=683, Unknown=0, NotChecked=0, Total=870 [2022-11-16 16:20:48,699 INFO L87 Difference]: Start difference. First operand 97 states and 108 transitions. Second operand has 30 states, 30 states have (on average 4.7) internal successors, (141), 30 states have internal predecessors, (141), 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 16:20:51,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 16:20:52,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:20:52,861 INFO L93 Difference]: Finished difference Result 183 states and 204 transitions. [2022-11-16 16:20:52,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-16 16:20:52,862 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.7) internal successors, (141), 30 states have internal predecessors, (141), 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 63 [2022-11-16 16:20:52,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:20:52,863 INFO L225 Difference]: With dead ends: 183 [2022-11-16 16:20:52,863 INFO L226 Difference]: Without dead ends: 159 [2022-11-16 16:20:52,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 330 SyntacticMatches, 14 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=304, Invalid=1336, Unknown=0, NotChecked=0, Total=1640 [2022-11-16 16:20:52,864 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 212 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:20:52,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 348 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 482 Invalid, 0 Unknown, 50 Unchecked, 3.2s Time] [2022-11-16 16:20:52,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-11-16 16:20:52,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2022-11-16 16:20:52,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.115702479338843) internal successors, (135), 121 states have internal predecessors, (135), 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 16:20:52,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 135 transitions. [2022-11-16 16:20:52,893 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 135 transitions. Word has length 63 [2022-11-16 16:20:52,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:20:52,893 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 135 transitions. [2022-11-16 16:20:52,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.7) internal successors, (141), 30 states have internal predecessors, (141), 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 16:20:52,894 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 135 transitions. [2022-11-16 16:20:52,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-16 16:20:52,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:20:52,895 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:20:52,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-16 16:20:53,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-11-16 16:20:53,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-16 16:20:53,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:20:53,508 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:20:53,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:20:53,508 INFO L85 PathProgramCache]: Analyzing trace with hash 26281475, now seen corresponding path program 8 times [2022-11-16 16:20:53,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:20:53,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [955692064] [2022-11-16 16:20:53,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:20:53,509 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:20:53,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:20:53,509 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 16:20:53,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-16 16:20:53,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:20:53,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:20:53,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-16 16:20:53,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:20:53,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 16:20:53,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 16:20:53,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:53,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 16:20:53,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:53,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 16:20:54,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:54,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 16:20:54,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:54,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 16:20:54,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 16:20:54,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2022-11-16 16:20:54,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-16 16:20:54,605 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 8 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:20:54,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:20:56,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-16 16:20:56,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 16:20:56,567 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 8 proven. 72 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:20:56,568 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:20:56,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [955692064] [2022-11-16 16:20:56,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [955692064] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:20:56,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2135528407] [2022-11-16 16:20:56,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:20:56,568 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:20:56,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:20:56,569 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:20:56,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-16 16:20:56,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:20:56,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:20:56,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-16 16:20:56,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:20:57,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 16:20:57,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 16:20:57,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:57,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 16:20:57,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:57,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 16:20:57,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:57,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 16:20:57,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:57,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 16:20:57,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 16:20:57,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2022-11-16 16:20:57,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-16 16:20:57,658 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 8 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:20:57,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:20:58,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-16 16:20:58,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 16:20:59,085 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 8 proven. 72 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:20:59,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2135528407] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:20:59,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237709872] [2022-11-16 16:20:59,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:20:59,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:20:59,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:20:59,086 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:20:59,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-16 16:20:59,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:20:59,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:20:59,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-16 16:20:59,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:20:59,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 16:20:59,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 16:20:59,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:59,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 16:20:59,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:59,464 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 16:20:59,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 25 [2022-11-16 16:20:59,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:59,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 16:20:59,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:20:59,538 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 16:20:59,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 25 [2022-11-16 16:20:59,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 16:20:59,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2022-11-16 16:20:59,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-16 16:20:59,980 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 8 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:20:59,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:21:00,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-16 16:21:00,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 16:21:00,998 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 8 proven. 59 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 16:21:00,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237709872] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:21:00,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:21:00,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 13, 16, 13, 13] total 26 [2022-11-16 16:21:01,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854639752] [2022-11-16 16:21:01,000 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:21:01,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 16:21:01,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:21:01,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 16:21:01,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-11-16 16:21:01,002 INFO L87 Difference]: Start difference. First operand 122 states and 135 transitions. Second operand has 26 states, 26 states have (on average 4.615384615384615) internal successors, (120), 26 states have internal predecessors, (120), 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 16:21:04,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 16:21:06,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:21:06,167 INFO L93 Difference]: Finished difference Result 209 states and 228 transitions. [2022-11-16 16:21:06,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-16 16:21:06,167 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.615384615384615) internal successors, (120), 26 states have internal predecessors, (120), 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 63 [2022-11-16 16:21:06,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:21:06,168 INFO L225 Difference]: With dead ends: 209 [2022-11-16 16:21:06,168 INFO L226 Difference]: Without dead ends: 193 [2022-11-16 16:21:06,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 331 SyntacticMatches, 26 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1066 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=407, Invalid=2455, Unknown=0, NotChecked=0, Total=2862 [2022-11-16 16:21:06,170 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 342 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-16 16:21:06,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 360 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 770 Invalid, 1 Unknown, 143 Unchecked, 3.6s Time] [2022-11-16 16:21:06,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-11-16 16:21:06,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 132. [2022-11-16 16:21:06,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.0916030534351144) internal successors, (143), 131 states have internal predecessors, (143), 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 16:21:06,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 143 transitions. [2022-11-16 16:21:06,208 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 143 transitions. Word has length 63 [2022-11-16 16:21:06,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:21:06,208 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 143 transitions. [2022-11-16 16:21:06,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.615384615384615) internal successors, (120), 26 states have internal predecessors, (120), 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 16:21:06,209 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 143 transitions. [2022-11-16 16:21:06,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-16 16:21:06,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:21:06,210 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:21:06,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-11-16 16:21:06,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-16 16:21:06,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-11-16 16:21:06,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:21:06,814 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:21:06,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:21:06,815 INFO L85 PathProgramCache]: Analyzing trace with hash 744016241, now seen corresponding path program 9 times [2022-11-16 16:21:06,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:21:06,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [644824184] [2022-11-16 16:21:06,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:21:06,815 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:21:06,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:21:06,816 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 16:21:06,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-16 16:21:06,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-16 16:21:06,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:21:06,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:21:06,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:21:10,346 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-16 16:21:10,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:21:17,576 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-16 16:21:17,576 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:21:17,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [644824184] [2022-11-16 16:21:17,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [644824184] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:21:17,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [738451121] [2022-11-16 16:21:17,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:21:17,576 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:21:17,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:21:17,577 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:21:17,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-16 16:21:18,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-16 16:21:18,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:21:18,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:21:18,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:21:25,214 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-16 16:21:25,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:21:27,366 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-16 16:21:27,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [738451121] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:21:27,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165835084] [2022-11-16 16:21:27,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:21:27,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:21:27,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:21:27,368 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:21:27,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-16 16:21:27,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-16 16:21:27,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:21:27,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 16:21:27,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:21:33,019 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-16 16:21:33,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:21:36,309 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-16 16:21:36,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165835084] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:21:36,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:21:36,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14, 14, 12, 13] total 44 [2022-11-16 16:21:36,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821987297] [2022-11-16 16:21:36,310 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:21:36,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-16 16:21:36,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:21:36,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-16 16:21:36,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=1460, Unknown=0, NotChecked=0, Total=1892 [2022-11-16 16:21:36,312 INFO L87 Difference]: Start difference. First operand 132 states and 143 transitions. Second operand has 44 states, 44 states have (on average 3.2045454545454546) internal successors, (141), 44 states have internal predecessors, (141), 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 16:21:59,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:21:59,417 INFO L93 Difference]: Finished difference Result 313 states and 349 transitions. [2022-11-16 16:21:59,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-16 16:21:59,420 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.2045454545454546) internal successors, (141), 44 states have internal predecessors, (141), 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 73 [2022-11-16 16:21:59,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:21:59,422 INFO L225 Difference]: With dead ends: 313 [2022-11-16 16:21:59,422 INFO L226 Difference]: Without dead ends: 247 [2022-11-16 16:21:59,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1655 ImplicationChecksByTransitivity, 34.5s TimeCoverageRelationStatistics Valid=1044, Invalid=3926, Unknown=0, NotChecked=0, Total=4970 [2022-11-16 16:21:59,424 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 694 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-11-16 16:21:59,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [694 Valid, 195 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-11-16 16:21:59,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-11-16 16:21:59,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 184. [2022-11-16 16:21:59,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.098360655737705) internal successors, (201), 183 states have internal predecessors, (201), 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 16:21:59,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 201 transitions. [2022-11-16 16:21:59,454 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 201 transitions. Word has length 73 [2022-11-16 16:21:59,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:21:59,455 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 201 transitions. [2022-11-16 16:21:59,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.2045454545454546) internal successors, (141), 44 states have internal predecessors, (141), 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 16:21:59,455 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 201 transitions. [2022-11-16 16:21:59,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-16 16:21:59,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:21:59,456 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:21:59,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-11-16 16:21:59,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-16 16:21:59,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-16 16:22:00,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:22:00,057 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:22:00,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:22:00,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1296547097, now seen corresponding path program 10 times [2022-11-16 16:22:00,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:22:00,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1834733733] [2022-11-16 16:22:00,058 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 16:22:00,058 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:22:00,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:22:00,059 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 16:22:00,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-16 16:22:00,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 16:22:00,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:22:00,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 16:22:00,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:22:09,987 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 18 proven. 111 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 16:22:09,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:22:17,788 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 18 proven. 111 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 16:22:17,788 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:22:17,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1834733733] [2022-11-16 16:22:17,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1834733733] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:22:17,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1711207485] [2022-11-16 16:22:17,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 16:22:17,788 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:22:17,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:22:17,789 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:22:17,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-16 16:22:18,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 16:22:18,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:22:18,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 16:22:18,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:22:30,287 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 18 proven. 111 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 16:22:30,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:22:34,315 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 18 proven. 111 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 16:22:34,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1711207485] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:22:34,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018106989] [2022-11-16 16:22:34,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 16:22:34,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:22:34,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:22:34,316 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:22:34,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-16 16:22:34,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 16:22:34,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:22:34,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:22:34,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:22:39,531 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 18 proven. 111 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 16:22:39,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:22:40,631 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 18 proven. 111 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 16:22:40,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018106989] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:22:40,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:22:40,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16, 16, 16, 15] total 45 [2022-11-16 16:22:40,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229049661] [2022-11-16 16:22:40,632 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:22:40,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-16 16:22:40,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:22:40,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-16 16:22:40,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=1506, Unknown=0, NotChecked=0, Total=1980 [2022-11-16 16:22:40,633 INFO L87 Difference]: Start difference. First operand 184 states and 201 transitions. Second operand has 45 states, 45 states have (on average 4.288888888888889) internal successors, (193), 45 states have internal predecessors, (193), 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 16:22:49,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:22:49,146 INFO L93 Difference]: Finished difference Result 199 states and 217 transitions. [2022-11-16 16:22:49,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 16:22:49,150 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 4.288888888888889) internal successors, (193), 45 states have internal predecessors, (193), 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 75 [2022-11-16 16:22:49,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:22:49,151 INFO L225 Difference]: With dead ends: 199 [2022-11-16 16:22:49,151 INFO L226 Difference]: Without dead ends: 137 [2022-11-16 16:22:49,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=626, Invalid=1824, Unknown=0, NotChecked=0, Total=2450 [2022-11-16 16:22:49,152 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 411 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-16 16:22:49,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 426 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 975 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-11-16 16:22:49,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-16 16:22:49,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-11-16 16:22:49,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.1029411764705883) internal successors, (150), 136 states have internal predecessors, (150), 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 16:22:49,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 150 transitions. [2022-11-16 16:22:49,175 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 150 transitions. Word has length 75 [2022-11-16 16:22:49,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:22:49,175 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 150 transitions. [2022-11-16 16:22:49,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 4.288888888888889) internal successors, (193), 45 states have internal predecessors, (193), 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 16:22:49,176 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 150 transitions. [2022-11-16 16:22:49,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-16 16:22:49,176 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:22:49,176 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:22:49,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-16 16:22:49,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-16 16:22:49,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2022-11-16 16:22:49,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:22:49,777 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:22:49,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:22:49,778 INFO L85 PathProgramCache]: Analyzing trace with hash 786712044, now seen corresponding path program 11 times [2022-11-16 16:22:49,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:22:49,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2099401818] [2022-11-16 16:22:49,778 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 16:22:49,778 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:22:49,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:22:49,779 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 16:22:49,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-16 16:22:50,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-16 16:22:50,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:22:50,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 16:22:50,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:22:50,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 16:22:50,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 16:22:50,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:50,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 16:22:50,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 16:22:50,753 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 16:22:50,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:22:51,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-11-16 16:22:51,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 114 [2022-11-16 16:22:51,833 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 16:22:51,833 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:22:51,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2099401818] [2022-11-16 16:22:51,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2099401818] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:22:51,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2132478106] [2022-11-16 16:22:51,834 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 16:22:51,834 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:22:51,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:22:51,839 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:22:51,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1544b573-e6ba-42e9-8cd9-05f4f2283df1/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-16 16:22:58,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-16 16:22:58,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:22:58,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-16 16:22:58,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:22:58,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 16:22:58,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 16:22:58,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 16:22:58,404 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 16:22:58,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 43 [2022-11-16 16:22:58,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:58,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:58,507 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 16:22:58,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-11-16 16:22:58,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:58,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:58,530 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 16:22:58,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-11-16 16:22:58,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:58,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:22:58,633 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 16:22:58,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-11-16 16:22:58,655 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 16:22:58,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-11-16 16:22:59,477 INFO L321 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2022-11-16 16:22:59,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 35 [2022-11-16 16:22:59,588 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 44 proven. 53 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-16 16:22:59,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:23:25,927 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_937 (_ BitVec 32)) (v_ArrVal_935 (_ BitVec 32)) (v_ArrVal_941 (_ BitVec 32)) (|v_ULTIMATE.start_main_~i~0#1_556| (_ BitVec 32)) (v_ArrVal_939 (_ BitVec 32))) (let ((.cse1 (let ((.cse2 (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|))) (store (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (bvadd (_ bv4294967292 32) .cse2 |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_935) (bvadd .cse2 |c_ULTIMATE.start_main_~#volArray~0#1.offset| (_ bv4294967288 32)) v_ArrVal_937) (bvadd (_ bv4 32) .cse2 |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_939) (bvadd .cse2 |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_941)))) (let ((.cse0 (select .cse1 (bvadd (bvmul (_ bv4 32) |v_ULTIMATE.start_main_~i~0#1_556|) |c_ULTIMATE.start_main_~#volArray~0#1.offset|)))) (or (not (= .cse0 (_ bv0 32))) (bvsle (select .cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#volArray~0#1.offset|)) .cse0))))) is different from false [2022-11-16 16:24:38,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 219 treesize of output 213 [2022-11-16 16:24:45,227 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-16 16:24:45,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2598356735378583508 treesize of output 2592727235039064025