./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur --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 39b9505d3a064a677b57bccb6de3a4c04e873275d34ee3c16e80371638b07149 --- 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-38b53e6 [2022-11-26 00:34:44,984 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:34:44,986 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:34:45,019 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:34:45,021 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:34:45,023 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:34:45,026 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:34:45,032 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:34:45,034 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:34:45,036 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:34:45,038 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:34:45,041 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:34:45,043 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:34:45,047 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:34:45,052 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:34:45,055 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:34:45,058 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:34:45,066 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:34:45,068 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:34:45,070 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:34:45,072 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:34:45,073 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:34:45,075 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:34:45,076 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:34:45,080 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:34:45,080 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:34:45,080 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:34:45,082 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:34:45,082 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:34:45,083 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:34:45,084 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:34:45,085 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:34:45,086 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:34:45,086 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:34:45,088 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:34:45,088 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:34:45,089 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:34:45,089 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:34:45,089 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:34:45,090 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:34:45,091 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:34:45,097 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:34:45,136 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:34:45,137 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:34:45,137 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:34:45,138 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:34:45,138 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:34:45,142 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:34:45,142 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:34:45,142 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:34:45,142 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:34:45,143 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:34:45,144 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:34:45,144 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:34:45,144 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:34:45,144 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:34:45,145 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:34:45,145 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:34:45,145 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:34:45,145 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:34:45,147 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:34:45,147 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:34:45,147 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:34:45,147 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:34:45,148 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:34:45,148 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:34:45,148 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:34:45,149 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:34:45,149 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:34:45,149 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:34:45,150 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:34:45,150 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:34:45,150 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:34:45,150 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:34:45,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:34:45,151 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:34:45,151 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:34:45,151 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:34:45,152 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:34:45,152 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:34:45,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:34:45,152 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:34:45,153 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:34:45,153 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_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39b9505d3a064a677b57bccb6de3a4c04e873275d34ee3c16e80371638b07149 [2022-11-26 00:34:45,468 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:34:45,494 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:34:45,497 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:34:45,498 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:34:45,499 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:34:45,500 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound2.c [2022-11-26 00:34:48,811 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:34:49,070 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:34:49,072 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound2.c [2022-11-26 00:34:49,081 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/data/2eeb51670/a1dd3f0758db4b079cd1a5d8e0677f9a/FLAGb35950c77 [2022-11-26 00:34:49,104 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/data/2eeb51670/a1dd3f0758db4b079cd1a5d8e0677f9a [2022-11-26 00:34:49,110 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:34:49,115 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:34:49,120 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:34:49,120 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:34:49,124 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:34:49,125 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:34:49" (1/1) ... [2022-11-26 00:34:49,127 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69bd8b3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:34:49, skipping insertion in model container [2022-11-26 00:34:49,128 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:34:49" (1/1) ... [2022-11-26 00:34:49,137 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:34:49,163 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:34:49,340 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound2.c[526,539] [2022-11-26 00:34:49,358 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:34:49,370 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:34:49,382 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound2.c[526,539] [2022-11-26 00:34:49,389 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:34:49,403 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:34:49,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:34:49 WrapperNode [2022-11-26 00:34:49,404 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:34:49,405 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:34:49,405 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:34:49,405 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:34:49,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:34:49" (1/1) ... [2022-11-26 00:34:49,421 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:34:49" (1/1) ... [2022-11-26 00:34:49,442 INFO L138 Inliner]: procedures = 14, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2022-11-26 00:34:49,442 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:34:49,443 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:34:49,443 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:34:49,443 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:34:49,452 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:34:49" (1/1) ... [2022-11-26 00:34:49,453 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:34:49" (1/1) ... [2022-11-26 00:34:49,454 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:34:49" (1/1) ... [2022-11-26 00:34:49,455 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:34:49" (1/1) ... [2022-11-26 00:34:49,459 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:34:49" (1/1) ... [2022-11-26 00:34:49,464 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:34:49" (1/1) ... [2022-11-26 00:34:49,465 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:34:49" (1/1) ... [2022-11-26 00:34:49,466 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:34:49" (1/1) ... [2022-11-26 00:34:49,468 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:34:49,469 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:34:49,469 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:34:49,469 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:34:49,470 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:34:49" (1/1) ... [2022-11-26 00:34:49,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:34:49,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:34:49,508 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:34:49,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:34:49,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:34:49,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:34:49,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:34:49,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:34:49,563 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-26 00:34:49,563 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-26 00:34:49,629 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:34:49,632 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:34:49,917 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:34:49,971 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:34:49,972 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-26 00:34:49,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:34:49 BoogieIcfgContainer [2022-11-26 00:34:49,975 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:34:49,978 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:34:49,978 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:34:49,982 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:34:49,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:34:49" (1/3) ... [2022-11-26 00:34:49,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@596459c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:34:49, skipping insertion in model container [2022-11-26 00:34:49,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:34:49" (2/3) ... [2022-11-26 00:34:49,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@596459c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:34:49, skipping insertion in model container [2022-11-26 00:34:49,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:34:49" (3/3) ... [2022-11-26 00:34:49,986 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_valuebound2.c [2022-11-26 00:34:50,014 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:34:50,014 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:34:50,094 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:34:50,102 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;@2de1ad92, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:34:50,103 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:34:50,108 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-26 00:34:50,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 00:34:50,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:34:50,119 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 00:34:50,120 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:34:50,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:34:50,126 INFO L85 PathProgramCache]: Analyzing trace with hash -697525204, now seen corresponding path program 1 times [2022-11-26 00:34:50,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:34:50,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457770783] [2022-11-26 00:34:50,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:50,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:34:50,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:50,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:34:50,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:34:50,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457770783] [2022-11-26 00:34:50,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457770783] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:34:50,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:34:50,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:34:50,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476094437] [2022-11-26 00:34:50,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:34:50,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:34:50,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:34:50,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:34:50,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:34:50,722 INFO L87 Difference]: Start difference. First operand has 20 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:34:50,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:34:50,919 INFO L93 Difference]: Finished difference Result 51 states and 87 transitions. [2022-11-26 00:34:50,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:34:50,923 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-26 00:34:50,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:34:50,932 INFO L225 Difference]: With dead ends: 51 [2022-11-26 00:34:50,932 INFO L226 Difference]: Without dead ends: 28 [2022-11-26 00:34:50,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:34:50,941 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 11 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:34:50,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 77 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:34:50,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-26 00:34:50,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2022-11-26 00:34:50,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-26 00:34:50,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2022-11-26 00:34:50,994 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 6 [2022-11-26 00:34:50,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:34:50,995 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2022-11-26 00:34:50,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:34:50,996 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2022-11-26 00:34:50,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-26 00:34:50,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:34:50,998 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:34:50,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:34:50,999 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:34:51,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:34:51,000 INFO L85 PathProgramCache]: Analyzing trace with hash -515229903, now seen corresponding path program 1 times [2022-11-26 00:34:51,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:34:51,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255478900] [2022-11-26 00:34:51,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:51,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:34:51,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:51,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:34:51,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:34:51,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255478900] [2022-11-26 00:34:51,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255478900] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:34:51,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:34:51,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:34:51,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302490470] [2022-11-26 00:34:51,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:34:51,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:34:51,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:34:51,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:34:51,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:34:51,138 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:34:51,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:34:51,208 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2022-11-26 00:34:51,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:34:51,209 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-11-26 00:34:51,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:34:51,211 INFO L225 Difference]: With dead ends: 34 [2022-11-26 00:34:51,211 INFO L226 Difference]: Without dead ends: 32 [2022-11-26 00:34:51,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:34:51,213 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:34:51,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 70 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:34:51,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-26 00:34:51,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2022-11-26 00:34:51,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-26 00:34:51,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-11-26 00:34:51,224 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 11 [2022-11-26 00:34:51,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:34:51,224 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-11-26 00:34:51,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:34:51,225 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-11-26 00:34:51,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-26 00:34:51,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:34:51,226 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:34:51,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:34:51,227 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:34:51,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:34:51,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1604661492, now seen corresponding path program 1 times [2022-11-26 00:34:51,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:34:51,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474377639] [2022-11-26 00:34:51,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:51,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:34:51,245 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:34:51,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1970634172] [2022-11-26 00:34:51,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:51,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:34:51,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:34:51,251 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:34:51,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:34:51,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:51,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-26 00:34:51,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:34:51,630 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:34:51,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:34:51,827 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:34:51,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:34:51,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474377639] [2022-11-26 00:34:51,830 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:34:51,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970634172] [2022-11-26 00:34:51,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970634172] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:34:51,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1192806250] [2022-11-26 00:34:51,859 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-26 00:34:51,860 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:34:51,863 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:34:51,870 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:34:51,871 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:34:52,590 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 66 for LOIs [2022-11-26 00:34:52,622 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:34:53,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1192806250] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:34:53,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:34:53,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8, 7] total 15 [2022-11-26 00:34:53,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017460278] [2022-11-26 00:34:53,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:34:53,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:34:53,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:34:53,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:34:53,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-11-26 00:34:53,339 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-26 00:34:53,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:34:53,541 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2022-11-26 00:34:53,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:34:53,542 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2022-11-26 00:34:53,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:34:53,545 INFO L225 Difference]: With dead ends: 61 [2022-11-26 00:34:53,545 INFO L226 Difference]: Without dead ends: 43 [2022-11-26 00:34:53,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-11-26 00:34:53,552 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:34:53,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 51 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:34:53,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-26 00:34:53,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-26 00:34:53,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-26 00:34:53,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2022-11-26 00:34:53,577 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 16 [2022-11-26 00:34:53,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:34:53,577 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2022-11-26 00:34:53,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-26 00:34:53,578 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2022-11-26 00:34:53,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-26 00:34:53,580 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:34:53,581 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-26 00:34:53,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:34:53,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:34:53,787 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:34:53,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:34:53,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1042343919, now seen corresponding path program 1 times [2022-11-26 00:34:53,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:34:53,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677838080] [2022-11-26 00:34:53,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:53,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:34:53,799 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:34:53,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1839697644] [2022-11-26 00:34:53,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:53,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:34:53,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:34:53,801 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:34:53,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:34:53,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:53,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-26 00:34:53,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:34:53,996 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-26 00:34:53,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:34:54,142 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-26 00:34:54,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:34:54,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677838080] [2022-11-26 00:34:54,143 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:34:54,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839697644] [2022-11-26 00:34:54,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839697644] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:34:54,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [306480549] [2022-11-26 00:34:54,145 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 00:34:54,146 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:34:54,146 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:34:54,146 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:34:54,146 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:34:57,119 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-11-26 00:34:57,131 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:34:58,103 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '702#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:34:58,103 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:34:58,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:34:58,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2022-11-26 00:34:58,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588553023] [2022-11-26 00:34:58,104 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:34:58,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-26 00:34:58,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:34:58,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-26 00:34:58,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-11-26 00:34:58,106 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-26 00:34:58,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:34:58,425 INFO L93 Difference]: Finished difference Result 77 states and 98 transitions. [2022-11-26 00:34:58,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-26 00:34:58,426 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) Word has length 33 [2022-11-26 00:34:58,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:34:58,428 INFO L225 Difference]: With dead ends: 77 [2022-11-26 00:34:58,429 INFO L226 Difference]: Without dead ends: 64 [2022-11-26 00:34:58,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 75 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-11-26 00:34:58,430 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 31 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:34:58,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 52 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:34:58,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-26 00:34:58,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-11-26 00:34:58,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 39 states have internal predecessors, (40), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-26 00:34:58,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2022-11-26 00:34:58,465 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 33 [2022-11-26 00:34:58,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:34:58,466 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2022-11-26 00:34:58,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-26 00:34:58,467 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2022-11-26 00:34:58,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-26 00:34:58,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:34:58,468 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:34:58,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:34:58,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:34:58,675 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:34:58,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:34:58,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1798480357, now seen corresponding path program 1 times [2022-11-26 00:34:58,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:34:58,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755158024] [2022-11-26 00:34:58,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:58,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:34:58,698 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:34:58,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1919459702] [2022-11-26 00:34:58,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:58,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:34:58,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:34:58,723 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:34:58,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:34:58,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:58,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:34:58,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:34:58,928 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-26 00:34:58,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:34:59,085 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-26 00:34:59,086 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:34:59,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755158024] [2022-11-26 00:34:59,087 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:34:59,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919459702] [2022-11-26 00:34:59,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919459702] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:34:59,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1180626830] [2022-11-26 00:34:59,098 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-26 00:34:59,099 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:34:59,099 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:34:59,099 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:34:59,100 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:35:01,775 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-26 00:35:01,796 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:35:02,782 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1175#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:35:02,783 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:35:02,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:35:02,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-11-26 00:35:02,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761304058] [2022-11-26 00:35:02,783 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:35:02,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-26 00:35:02,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:35:02,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-26 00:35:02,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:35:02,785 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-26 00:35:02,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:35:02,981 INFO L93 Difference]: Finished difference Result 73 states and 88 transitions. [2022-11-26 00:35:02,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:35:02,982 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 40 [2022-11-26 00:35:02,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:35:02,983 INFO L225 Difference]: With dead ends: 73 [2022-11-26 00:35:02,984 INFO L226 Difference]: Without dead ends: 71 [2022-11-26 00:35:02,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-11-26 00:35:02,985 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:35:02,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 46 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:35:02,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-26 00:35:03,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2022-11-26 00:35:03,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 40 states have (on average 1.125) internal successors, (45), 43 states have internal predecessors, (45), 21 states have call successors, (21), 8 states have call predecessors, (21), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-26 00:35:03,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2022-11-26 00:35:03,035 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 40 [2022-11-26 00:35:03,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:35:03,036 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2022-11-26 00:35:03,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-26 00:35:03,038 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2022-11-26 00:35:03,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-26 00:35:03,043 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:35:03,044 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:35:03,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:35:03,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:35:03,250 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:35:03,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:35:03,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1731990838, now seen corresponding path program 1 times [2022-11-26 00:35:03,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:35:03,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532332085] [2022-11-26 00:35:03,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:35:03,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:35:03,264 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:35:03,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [205641265] [2022-11-26 00:35:03,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:35:03,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:35:03,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:35:03,266 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:35:03,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:35:03,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:35:03,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-26 00:35:03,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:35:03,729 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-26 00:35:03,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:35:05,632 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-26 00:35:05,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:35:05,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532332085] [2022-11-26 00:35:05,632 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:35:05,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205641265] [2022-11-26 00:35:05,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205641265] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:35:05,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1556306756] [2022-11-26 00:35:05,635 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-26 00:35:05,635 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:35:05,635 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:35:05,635 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:35:05,636 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:35:09,185 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-11-26 00:35:09,200 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:35:10,395 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1727#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:35:10,396 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:35:10,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:35:10,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-11-26 00:35:10,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462942150] [2022-11-26 00:35:10,396 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:35:10,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-26 00:35:10,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:35:10,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-26 00:35:10,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-11-26 00:35:10,399 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 9 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2022-11-26 00:35:13,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:35:13,398 INFO L93 Difference]: Finished difference Result 101 states and 117 transitions. [2022-11-26 00:35:13,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-26 00:35:13,399 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 9 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) Word has length 52 [2022-11-26 00:35:13,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:35:13,401 INFO L225 Difference]: With dead ends: 101 [2022-11-26 00:35:13,401 INFO L226 Difference]: Without dead ends: 99 [2022-11-26 00:35:13,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 126 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=196, Invalid=926, Unknown=0, NotChecked=0, Total=1122 [2022-11-26 00:35:13,402 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 31 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:35:13,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 72 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-26 00:35:13,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-26 00:35:13,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92. [2022-11-26 00:35:13,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 60 states have internal predecessors, (61), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-26 00:35:13,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2022-11-26 00:35:13,436 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 52 [2022-11-26 00:35:13,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:35:13,437 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2022-11-26 00:35:13,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 9 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2022-11-26 00:35:13,437 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2022-11-26 00:35:13,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-26 00:35:13,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:35:13,439 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:35:13,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:35:13,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:35:13,645 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:35:13,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:35:13,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1143375622, now seen corresponding path program 1 times [2022-11-26 00:35:13,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:35:13,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456253508] [2022-11-26 00:35:13,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:35:13,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:35:13,655 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:35:13,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1260692057] [2022-11-26 00:35:13,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:35:13,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:35:13,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:35:13,657 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:35:13,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:35:13,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:35:13,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-26 00:35:13,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:35:14,071 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-26 00:35:14,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:35:14,672 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-26 00:35:14,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:35:14,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456253508] [2022-11-26 00:35:14,672 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:35:14,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260692057] [2022-11-26 00:35:14,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260692057] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:35:14,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1712529712] [2022-11-26 00:35:14,679 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-26 00:35:14,679 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:35:14,680 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:35:14,680 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:35:14,680 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:35:17,904 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-11-26 00:35:17,914 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:35:19,089 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2425#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:35:19,089 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:35:19,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:35:19,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-11-26 00:35:19,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858983924] [2022-11-26 00:35:19,090 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:35:19,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-26 00:35:19,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:35:19,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-26 00:35:19,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2022-11-26 00:35:19,093 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 9 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) [2022-11-26 00:35:20,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:35:20,109 INFO L93 Difference]: Finished difference Result 114 states and 133 transitions. [2022-11-26 00:35:20,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-26 00:35:20,109 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 9 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) Word has length 63 [2022-11-26 00:35:20,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:35:20,111 INFO L225 Difference]: With dead ends: 114 [2022-11-26 00:35:20,111 INFO L226 Difference]: Without dead ends: 99 [2022-11-26 00:35:20,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 157 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=189, Invalid=867, Unknown=0, NotChecked=0, Total=1056 [2022-11-26 00:35:20,114 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 25 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:35:20,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 61 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 00:35:20,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-26 00:35:20,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 85. [2022-11-26 00:35:20,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 55 states have internal predecessors, (58), 18 states have call successors, (18), 13 states have call predecessors, (18), 13 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-26 00:35:20,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 93 transitions. [2022-11-26 00:35:20,146 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 93 transitions. Word has length 63 [2022-11-26 00:35:20,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:35:20,146 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 93 transitions. [2022-11-26 00:35:20,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 9 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) [2022-11-26 00:35:20,147 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 93 transitions. [2022-11-26 00:35:20,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-26 00:35:20,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:35:20,148 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:35:20,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:35:20,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:35:20,355 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:35:20,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:35:20,355 INFO L85 PathProgramCache]: Analyzing trace with hash 2113244439, now seen corresponding path program 1 times [2022-11-26 00:35:20,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:35:20,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662848699] [2022-11-26 00:35:20,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:35:20,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:35:20,364 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:35:20,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1128085287] [2022-11-26 00:35:20,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:35:20,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:35:20,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:35:20,366 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:35:20,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:35:20,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:35:20,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-26 00:35:20,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:35:20,496 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-11-26 00:35:20,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:35:20,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:35:20,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662848699] [2022-11-26 00:35:20,497 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:35:20,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128085287] [2022-11-26 00:35:20,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128085287] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:35:20,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:35:20,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:35:20,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314080826] [2022-11-26 00:35:20,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:35:20,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:35:20,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:35:20,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:35:20,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:35:20,505 INFO L87 Difference]: Start difference. First operand 85 states and 93 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-26 00:35:20,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:35:20,588 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2022-11-26 00:35:20,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:35:20,590 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 73 [2022-11-26 00:35:20,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:35:20,594 INFO L225 Difference]: With dead ends: 92 [2022-11-26 00:35:20,594 INFO L226 Difference]: Without dead ends: 80 [2022-11-26 00:35:20,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:35:20,597 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 4 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:35:20,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 58 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:35:20,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-26 00:35:20,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-11-26 00:35:20,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 50 states have (on average 1.06) internal successors, (53), 51 states have internal predecessors, (53), 17 states have call successors, (17), 12 states have call predecessors, (17), 12 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-26 00:35:20,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2022-11-26 00:35:20,637 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 73 [2022-11-26 00:35:20,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:35:20,637 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2022-11-26 00:35:20,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-26 00:35:20,638 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2022-11-26 00:35:20,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-26 00:35:20,643 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:35:20,643 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-26 00:35:20,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:35:20,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-26 00:35:20,849 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:35:20,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:35:20,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1241228560, now seen corresponding path program 2 times [2022-11-26 00:35:20,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:35:20,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980921705] [2022-11-26 00:35:20,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:35:20,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:35:20,858 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:35:20,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [365963213] [2022-11-26 00:35:20,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:35:20,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:35:20,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:35:20,860 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:35:20,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:35:20,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:35:20,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:35:20,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-26 00:35:20,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:35:21,170 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 41 proven. 34 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-26 00:35:21,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:35:22,455 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 41 proven. 29 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2022-11-26 00:35:22,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:35:22,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980921705] [2022-11-26 00:35:22,455 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:35:22,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365963213] [2022-11-26 00:35:22,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365963213] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:35:22,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2025496353] [2022-11-26 00:35:22,460 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-26 00:35:22,461 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:35:22,461 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:35:22,462 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:35:22,462 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:35:25,242 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-11-26 00:35:25,251 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:35:26,319 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3658#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:35:26,319 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:35:26,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:35:26,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2022-11-26 00:35:26,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213751204] [2022-11-26 00:35:26,320 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:35:26,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-26 00:35:26,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:35:26,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-26 00:35:26,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2022-11-26 00:35:26,322 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) [2022-11-26 00:35:33,086 WARN L233 SmtUtils]: Spent 6.48s on a formula simplification. DAG size of input: 38 DAG size of output: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:35:33,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:35:33,868 INFO L93 Difference]: Finished difference Result 112 states and 130 transitions. [2022-11-26 00:35:33,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 00:35:33,869 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) Word has length 74 [2022-11-26 00:35:33,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:35:33,870 INFO L225 Difference]: With dead ends: 112 [2022-11-26 00:35:33,871 INFO L226 Difference]: Without dead ends: 110 [2022-11-26 00:35:33,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 189 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2022-11-26 00:35:33,872 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 24 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:35:33,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 85 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 00:35:33,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-26 00:35:33,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2022-11-26 00:35:33,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 67 states have internal predecessors, (70), 28 states have call successors, (28), 14 states have call predecessors, (28), 14 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-26 00:35:33,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 125 transitions. [2022-11-26 00:35:33,917 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 125 transitions. Word has length 74 [2022-11-26 00:35:33,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:35:33,918 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 125 transitions. [2022-11-26 00:35:33,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) [2022-11-26 00:35:33,918 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 125 transitions. [2022-11-26 00:35:33,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-26 00:35:33,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:35:33,920 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-11-26 00:35:33,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:35:34,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-26 00:35:34,126 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:35:34,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:35:34,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1175687132, now seen corresponding path program 3 times [2022-11-26 00:35:34,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:35:34,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861613129] [2022-11-26 00:35:34,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:35:34,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:35:34,137 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:35:34,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [770195693] [2022-11-26 00:35:34,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:35:34,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:35:34,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:35:34,139 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:35:34,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:35:34,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:35:34,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:35:34,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-26 00:35:34,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:36:16,325 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 96 proven. 67 refuted. 6 times theorem prover too weak. 192 trivial. 0 not checked. [2022-11-26 00:36:16,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:36:48,917 WARN L233 SmtUtils]: Spent 8.57s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:38:01,927 WARN L233 SmtUtils]: Spent 25.51s on a formula simplification that was a NOOP. DAG size: 120 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:39:28,882 WARN L233 SmtUtils]: Spent 5.41s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:40:01,326 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 105 proven. 34 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-11-26 00:40:01,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:40:01,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861613129] [2022-11-26 00:40:01,327 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:40:01,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770195693] [2022-11-26 00:40:01,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770195693] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:40:01,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [140898560] [2022-11-26 00:40:01,330 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-26 00:40:01,330 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:40:01,330 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:40:01,330 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:40:01,331 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:40:04,257 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-11-26 00:40:04,265 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:40:10,018 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4507#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:40:10,018 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:40:10,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:40:10,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2022-11-26 00:40:10,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317877687] [2022-11-26 00:40:10,019 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:40:10,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-26 00:40:10,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:40:10,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-26 00:40:10,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=969, Unknown=10, NotChecked=0, Total=1190 [2022-11-26 00:40:10,021 INFO L87 Difference]: Start difference. First operand 108 states and 125 transitions. Second operand has 25 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 17 states have internal predecessors, (35), 16 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 13 states have call predecessors, (24), 14 states have call successors, (24) [2022-11-26 00:40:12,053 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse4 (div |c_ULTIMATE.start_main_~d~0#1| 2))) (let ((.cse7 (* |c_ULTIMATE.start_main_~B~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse1 (+ .cse4 1))) (let ((.cse32 (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~B~0#1|)) (.cse17 (div |c_ULTIMATE.start_main_~p~0#1| 2)) (.cse18 (= (mod |c_ULTIMATE.start_main_~p~0#1| 2) 0)) (.cse0 (= (mod |c_ULTIMATE.start_main_~d~0#1| 2) 0)) (.cse51 (< |c_ULTIMATE.start_main_~d~0#1| 0)) (.cse52 (<= .cse1 |c_ULTIMATE.start_main_~r~0#1|)) (.cse53 (<= .cse4 |c_ULTIMATE.start_main_~r~0#1|)) (.cse50 (= |c_ULTIMATE.start_main_~A~0#1| (+ .cse7 |c_ULTIMATE.start_main_~r~0#1|))) (.cse31 (< |c_ULTIMATE.start_main_~p~0#1| 0))) (let ((.cse6 (not .cse31)) (.cse24 (or .cse53 .cse50)) (.cse25 (not .cse53)) (.cse26 (+ .cse4 |c_ULTIMATE.start_main_~A~0#1|)) (.cse20 (or .cse52 .cse50)) (.cse21 (not .cse52)) (.cse22 (+ .cse4 |c_ULTIMATE.start_main_~A~0#1| 1)) (.cse3 (not .cse51)) (.cse5 (and .cse51 (not .cse0))) (.cse19 (and (not .cse18) .cse31)) (.cse9 (not .cse50)) (.cse13 (* .cse17 |c_ULTIMATE.start_main_~B~0#1|)) (.cse27 (= .cse32 |c_ULTIMATE.start_main_~d~0#1|))) (and (let ((.cse2 (+ |c_ULTIMATE.start_main_~B~0#1| .cse13))) (or (and (or .cse0 (not (= .cse1 .cse2)) .cse3) (or (not (= .cse4 .cse2)) .cse5)) .cse6 (let ((.cse16 (+ .cse17 1))) (let ((.cse15 (+ |c_ULTIMATE.start_main_~B~0#1| (* (div .cse16 2) |c_ULTIMATE.start_main_~B~0#1|))) (.cse8 (div .cse2 2))) (let ((.cse10 (= .cse15 .cse8)) (.cse11 (<= .cse2 |c_ULTIMATE.start_main_~r~0#1|)) (.cse12 (= (mod .cse16 2) 0))) (and (or (not (<= (+ .cse7 .cse8) |c_ULTIMATE.start_main_~A~0#1|)) .cse9 .cse10 .cse11 .cse12) (or (let ((.cse14 (< .cse2 0))) (and (or (not (<= (+ .cse7 .cse8 |c_ULTIMATE.start_main_~B~0#1| .cse13) |c_ULTIMATE.start_main_~A~0#1|)) .cse10 (and .cse14 (not (= (mod .cse2 2) 0)))) (or (not .cse14) (= .cse15 (+ .cse8 1))))) (not .cse11) .cse9 .cse12))))) .cse18)) (or .cse19 (let ((.cse23 (+ .cse7 |c_ULTIMATE.start_main_~r~0#1| .cse13))) (and (or .cse0 (and .cse20 (or .cse21 (= .cse22 .cse23))) .cse3) (or (and .cse24 (or .cse25 (= .cse26 .cse23))) .cse5)))) (or (not .cse27) (let ((.cse30 (div .cse32 2))) (let ((.cse28 (< (* 2 |c_ULTIMATE.start_main_~d~0#1|) (+ .cse32 .cse30 1))) (.cse29 (* |c_ULTIMATE.start_main_~B~0#1| (div (* |c_ULTIMATE.start_main_~p~0#1| 2) 4)))) (and (or .cse28 .cse6 (= (+ |c_ULTIMATE.start_main_~B~0#1| .cse29) .cse30) .cse18) (or .cse28 (= .cse30 .cse29) .cse31))))) (or .cse6 (let ((.cse33 (+ .cse7 |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~B~0#1| .cse13))) (and (or (and .cse24 (or .cse25 (= .cse26 .cse33))) .cse5) (or (and .cse20 (or .cse21 (= .cse22 .cse33))) .cse0 .cse3))) .cse18) (or (and (or (not (= .cse13 .cse1)) .cse0 .cse3) (or (not (= .cse4 .cse13)) .cse5)) .cse19 (let ((.cse46 (* (div |c_ULTIMATE.start_main_~p~0#1| 4) |c_ULTIMATE.start_main_~B~0#1|))) (let ((.cse39 (< .cse17 0)) (.cse48 (+ .cse46 |c_ULTIMATE.start_main_~B~0#1|)) (.cse40 (div .cse13 2))) (let ((.cse41 (<= .cse13 |c_ULTIMATE.start_main_~r~0#1|)) (.cse38 (= .cse40 .cse46)) (.cse35 (= (mod .cse17 2) 0)) (.cse34 (= .cse40 .cse48)) (.cse37 (not .cse39))) (and (or (let ((.cse36 (not (<= (+ .cse40 .cse7) |c_ULTIMATE.start_main_~A~0#1|)))) (and (or .cse34 .cse35 .cse36 .cse37) (or .cse38 .cse36 .cse39))) .cse41 .cse9) (or (not .cse41) .cse9 (let ((.cse44 (= (mod .cse13 2) 0)) (.cse49 (< .cse13 0))) (let ((.cse47 (+ .cse40 1)) (.cse45 (not .cse49)) (.cse42 (and .cse49 (not .cse44))) (.cse43 (not (<= (+ .cse40 .cse7 .cse13) |c_ULTIMATE.start_main_~A~0#1|)))) (and (or (and (or .cse42 .cse38 .cse43) (or .cse44 .cse45 (= .cse46 .cse47))) .cse39) (or .cse35 (and (or (= .cse47 .cse48) .cse45) (or .cse34 .cse42 .cse43)) .cse37)))))))))) .cse50 .cse27))))) is different from false [2022-11-26 00:40:24,279 WARN L233 SmtUtils]: Spent 10.10s on a formula simplification that was a NOOP. DAG size: 97 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:40:48,780 WARN L233 SmtUtils]: Spent 15.55s on a formula simplification. DAG size of input: 97 DAG size of output: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:41:04,944 WARN L233 SmtUtils]: Spent 10.68s on a formula simplification. DAG size of input: 88 DAG size of output: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:41:07,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:41:22,453 WARN L233 SmtUtils]: Spent 5.56s on a formula simplification. DAG size of input: 87 DAG size of output: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:41:41,970 WARN L233 SmtUtils]: Spent 8.24s on a formula simplification. DAG size of input: 88 DAG size of output: 50 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:41:43,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:41:46,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:41:53,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:41:55,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:41:57,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:42:19,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:42:34,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:42:37,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:42:40,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:42:42,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:42:44,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:42:46,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:42:48,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:42:51,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:42:54,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:42:57,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:42:59,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:43:03,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:43:10,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-11-26 00:43:13,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-11-26 00:43:15,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-11-26 00:43:17,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-11-26 00:43:19,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-11-26 00:43:23,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-11-26 00:43:30,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-11-26 00:43:34,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:44:26,204 WARN L233 SmtUtils]: Spent 28.85s on a formula simplification. DAG size of input: 147 DAG size of output: 92 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:44:36,272 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse7 (* |c_ULTIMATE.start_main_~B~0#1| |c_ULTIMATE.start_main_~q~0#1|))) (let ((.cse17 (div |c_ULTIMATE.start_main_~p~0#1| 2)) (.cse35 (= |c_ULTIMATE.start_main_~A~0#1| (+ .cse7 |c_ULTIMATE.start_main_~r~0#1|))) (.cse0 (= (mod |c_ULTIMATE.start_main_~d~0#1| 2) 0)) (.cse36 (< |c_ULTIMATE.start_main_~d~0#1| 0)) (.cse4 (div |c_ULTIMATE.start_main_~d~0#1| 2))) (let ((.cse1 (+ .cse4 1)) (.cse3 (not .cse36)) (.cse5 (and .cse36 (not .cse0))) (.cse18 (= (mod |c_ULTIMATE.start_main_~p~0#1| 2) 0)) (.cse6 (< |c_ULTIMATE.start_main_~p~0#1| 0)) (.cse9 (not .cse35)) (.cse13 (* .cse17 |c_ULTIMATE.start_main_~B~0#1|))) (and (let ((.cse2 (+ |c_ULTIMATE.start_main_~B~0#1| .cse13))) (or (and (or .cse0 (not (= .cse1 .cse2)) .cse3) (or (not (= .cse4 .cse2)) .cse5)) (not .cse6) (let ((.cse16 (+ .cse17 1))) (let ((.cse15 (+ |c_ULTIMATE.start_main_~B~0#1| (* (div .cse16 2) |c_ULTIMATE.start_main_~B~0#1|))) (.cse8 (div .cse2 2))) (let ((.cse10 (= .cse15 .cse8)) (.cse11 (<= .cse2 |c_ULTIMATE.start_main_~r~0#1|)) (.cse12 (= (mod .cse16 2) 0))) (and (or (not (<= (+ .cse7 .cse8) |c_ULTIMATE.start_main_~A~0#1|)) .cse9 .cse10 .cse11 .cse12) (or (let ((.cse14 (< .cse2 0))) (and (or (not (<= (+ .cse7 .cse8 |c_ULTIMATE.start_main_~B~0#1| .cse13) |c_ULTIMATE.start_main_~A~0#1|)) .cse10 (and .cse14 (not (= (mod .cse2 2) 0)))) (or (not .cse14) (= .cse15 (+ .cse8 1))))) (not .cse11) .cse9 .cse12))))) .cse18)) (or (and (or (not (= .cse13 .cse1)) .cse0 .cse3) (or (not (= .cse4 .cse13)) .cse5)) (and (not .cse18) .cse6) (let ((.cse31 (* (div |c_ULTIMATE.start_main_~p~0#1| 4) |c_ULTIMATE.start_main_~B~0#1|))) (let ((.cse24 (< .cse17 0)) (.cse33 (+ .cse31 |c_ULTIMATE.start_main_~B~0#1|)) (.cse25 (div .cse13 2))) (let ((.cse26 (<= .cse13 |c_ULTIMATE.start_main_~r~0#1|)) (.cse23 (= .cse25 .cse31)) (.cse20 (= (mod .cse17 2) 0)) (.cse19 (= .cse25 .cse33)) (.cse22 (not .cse24))) (and (or (let ((.cse21 (not (<= (+ .cse25 .cse7) |c_ULTIMATE.start_main_~A~0#1|)))) (and (or .cse19 .cse20 .cse21 .cse22) (or .cse23 .cse21 .cse24))) .cse26 .cse9) (or (not .cse26) .cse9 (let ((.cse29 (= (mod .cse13 2) 0)) (.cse34 (< .cse13 0))) (let ((.cse32 (+ .cse25 1)) (.cse30 (not .cse34)) (.cse27 (and .cse34 (not .cse29))) (.cse28 (not (<= (+ .cse25 .cse7 .cse13) |c_ULTIMATE.start_main_~A~0#1|)))) (and (or (and (or .cse27 .cse23 .cse28) (or .cse29 .cse30 (= .cse31 .cse32))) .cse24) (or .cse20 (and (or (= .cse32 .cse33) .cse30) (or .cse19 .cse27 .cse28)) .cse22)))))))))) .cse35 (= (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~B~0#1|) |c_ULTIMATE.start_main_~d~0#1|))))) is different from false [2022-11-26 00:44:36,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:36,285 INFO L93 Difference]: Finished difference Result 120 states and 140 transitions. [2022-11-26 00:44:36,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-26 00:44:36,285 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 17 states have internal predecessors, (35), 16 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 13 states have call predecessors, (24), 14 states have call successors, (24) Word has length 81 [2022-11-26 00:44:36,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:36,286 INFO L225 Difference]: With dead ends: 120 [2022-11-26 00:44:36,286 INFO L226 Difference]: Without dead ends: 118 [2022-11-26 00:44:36,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 203 SyntacticMatches, 9 SemanticMatches, 49 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 289.2s TimeCoverageRelationStatistics Valid=388, Invalid=1938, Unknown=34, NotChecked=190, Total=2550 [2022-11-26 00:44:36,288 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 22 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 76 mSolverCounterUnsat, 21 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 81.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 21 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 81.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:36,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 107 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 463 Invalid, 21 Unknown, 14 Unchecked, 81.6s Time] [2022-11-26 00:44:36,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-26 00:44:36,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2022-11-26 00:44:36,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 72 states have internal predecessors, (74), 29 states have call successors, (29), 15 states have call predecessors, (29), 15 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2022-11-26 00:44:36,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 131 transitions. [2022-11-26 00:44:36,359 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 131 transitions. Word has length 81 [2022-11-26 00:44:36,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:36,360 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 131 transitions. [2022-11-26 00:44:36,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 17 states have internal predecessors, (35), 16 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 13 states have call predecessors, (24), 14 states have call successors, (24) [2022-11-26 00:44:36,360 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 131 transitions. [2022-11-26 00:44:36,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-26 00:44:36,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:36,362 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:36,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 00:44:36,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-26 00:44:36,570 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:44:36,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:36,570 INFO L85 PathProgramCache]: Analyzing trace with hash 20862120, now seen corresponding path program 2 times [2022-11-26 00:44:36,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:36,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598363588] [2022-11-26 00:44:36,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:36,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:36,582 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:44:36,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [475333286] [2022-11-26 00:44:36,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:44:36,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:36,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:44:36,585 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:44:36,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 00:44:36,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-26 00:44:36,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:44:36,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-26 00:44:36,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:44:36,944 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 117 proven. 39 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2022-11-26 00:44:36,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:44:37,245 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2022-11-26 00:44:37,245 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:37,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598363588] [2022-11-26 00:44:37,245 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:44:37,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475333286] [2022-11-26 00:44:37,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475333286] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:44:37,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2135153053] [2022-11-26 00:44:37,248 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-26 00:44:37,248 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:44:37,248 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:44:37,248 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:44:37,248 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:44:40,485 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-11-26 00:44:40,494 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:44:42,004 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5465#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:44:42,005 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:44:42,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:44:42,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2022-11-26 00:44:42,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675097313] [2022-11-26 00:44:42,006 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:44:42,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-26 00:44:42,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:42,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-26 00:44:42,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2022-11-26 00:44:42,008 INFO L87 Difference]: Start difference. First operand 114 states and 131 transitions. Second operand has 17 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 8 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-11-26 00:44:42,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:42,545 INFO L93 Difference]: Finished difference Result 114 states and 131 transitions. [2022-11-26 00:44:42,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:44:42,546 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 8 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 92 [2022-11-26 00:44:42,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:42,547 INFO L225 Difference]: With dead ends: 114 [2022-11-26 00:44:42,547 INFO L226 Difference]: Without dead ends: 0 [2022-11-26 00:44:42,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 242 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=178, Invalid=878, Unknown=0, NotChecked=0, Total=1056 [2022-11-26 00:44:42,549 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 30 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:42,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 30 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:44:42,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-26 00:44:42,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-26 00:44:42,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2022-11-26 00:44:42,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-26 00:44:42,551 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 92 [2022-11-26 00:44:42,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:42,551 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-26 00:44:42,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 8 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-11-26 00:44:42,552 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-26 00:44:42,552 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-26 00:44:42,555 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-26 00:44:42,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-26 00:44:42,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-26 00:44:42,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-26 00:44:54,800 WARN L233 SmtUtils]: Spent 8.02s on a formula simplification. DAG size of input: 294 DAG size of output: 17 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-26 00:44:57,094 INFO L895 garLoopResultBuilder]: At program point L52-2(lines 22 61) the Hoare annotation is: (and (<= 1 |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~A~0#1| (+ |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1|)) (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~B~0#1| 1)) [2022-11-26 00:44:57,095 INFO L895 garLoopResultBuilder]: At program point L44-1(lines 44 56) the Hoare annotation is: (and (= |ULTIMATE.start_main_~d~0#1| 1) (= |ULTIMATE.start_main_~A~0#1| (+ (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|)) (<= 1 |ULTIMATE.start_main_~p~0#1|) (= (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~p~0#1|) |ULTIMATE.start_main_~d~0#1|)) [2022-11-26 00:44:57,095 INFO L895 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (let ((.cse1 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse2 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse3 (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|)) (.cse6 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (let ((.cse0 (div (- |ULTIMATE.start_main_~p~0#1|) (- 2)))) (and (<= 4 |ULTIMATE.start_main_~p~0#1|) (<= (* 2 (* |ULTIMATE.start_main_~B~0#1| (div (- .cse0) (- 2)))) |ULTIMATE.start_main_~r~0#1|) .cse1 .cse2 .cse3 (= |ULTIMATE.start_main_~d~0#1| (* 2 (* .cse0 |ULTIMATE.start_main_~B~0#1|))) (= 0 (mod .cse0 2)))) (let ((.cse5 (select |#memory_int| 1)) (.cse4 (select |#memory_int| 2))) (and (= (select .cse4 7) 0) (= (select |#length| 3) 12) (= 114 (select .cse4 2)) (= (select .cse4 6) 99) (= 97 (select .cse4 1)) (= 2 (select |#length| 1)) (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) (= (select |#valid| 3) 1) (= (select .cse4 4) 50) (= (ite (and (<= |ULTIMATE.start_main_~A~0#1| 2) (<= 0 |ULTIMATE.start_main_~A~0#1|)) 1 0) |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= 100 (select .cse4 3)) .cse1 (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select |#valid| 1) 1) .cse2 (= (select |#valid| 0) 0) (not (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (select .cse4 5) 46) (= (select |#valid| 2) 1) .cse3 (= |#NULL.offset| 0) (= 8 (select |#length| 2)) (= (select .cse5 0) 48) .cse6 (= (select .cse5 1) 0) (= (select .cse4 0) 104) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) (and .cse1 .cse2 (<= 1 |ULTIMATE.start_main_~r~0#1|) .cse3 .cse6 (= 2 |ULTIMATE.start_main_~d~0#1|)))) [2022-11-26 00:44:57,095 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-26 00:44:57,096 INFO L895 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (and (<= 1 |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~A~0#1| (+ |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1|)) (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~B~0#1| 1)) [2022-11-26 00:44:57,096 INFO L895 garLoopResultBuilder]: At program point L45-1(line 45) the Hoare annotation is: (and (= |ULTIMATE.start_main_~A~0#1| (+ (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|)) (<= 1 |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~B~0#1| 1)) [2022-11-26 00:44:57,096 INFO L899 garLoopResultBuilder]: For program point L37(lines 34 42) no Hoare annotation was computed. [2022-11-26 00:44:57,096 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-26 00:44:57,096 INFO L895 garLoopResultBuilder]: At program point L58(line 58) the Hoare annotation is: (and (= |ULTIMATE.start_main_~p~0#1| 1) (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) (= |ULTIMATE.start_main_~B~0#1| 1)) [2022-11-26 00:44:57,096 INFO L899 garLoopResultBuilder]: For program point L46(lines 44 56) no Hoare annotation was computed. [2022-11-26 00:44:57,097 INFO L895 garLoopResultBuilder]: At program point L34-2(lines 34 42) the Hoare annotation is: (let ((.cse6 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse1 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse2 (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|)) (.cse4 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (let ((.cse3 (select |#memory_int| 1)) (.cse0 (select |#memory_int| 2))) (and (= (select .cse0 7) 0) (= (select |#length| 3) 12) (= 114 (select .cse0 2)) (= (select .cse0 6) 99) (= 97 (select .cse0 1)) (= 2 (select |#length| 1)) (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) (= (select |#valid| 3) 1) (= (select .cse0 4) 50) (= (ite (and (<= |ULTIMATE.start_main_~A~0#1| 2) (<= 0 |ULTIMATE.start_main_~A~0#1|)) 1 0) |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= 100 (select .cse0 3)) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select |#valid| 1) 1) .cse1 (= (select |#valid| 0) 0) (not (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (select .cse0 5) 46) (= (select |#valid| 2) 1) .cse2 (= |#NULL.offset| 0) (= 8 (select |#length| 2)) (= (select .cse3 0) 48) (= (+ (* |ULTIMATE.start_main_~B~0#1| (div |ULTIMATE.start_main_~p~0#1| 2)) (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) (+ (div |ULTIMATE.start_main_~d~0#1| 2) |ULTIMATE.start_main_~A~0#1|)) .cse4 (= (select .cse3 1) 0) (= (select .cse0 0) 104) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) (let ((.cse5 (div (- |ULTIMATE.start_main_~p~0#1|) (- 2)))) (and (<= 4 |ULTIMATE.start_main_~p~0#1|) (<= (* 2 (* |ULTIMATE.start_main_~B~0#1| (div (- .cse5) (- 2)))) |ULTIMATE.start_main_~r~0#1|) .cse6 .cse1 .cse2 (= |ULTIMATE.start_main_~d~0#1| (* 2 (* .cse5 |ULTIMATE.start_main_~B~0#1|))) (= 0 (mod .cse5 2)))) (and .cse6 .cse1 (<= 1 |ULTIMATE.start_main_~r~0#1|) .cse2 .cse4 (= 2 |ULTIMATE.start_main_~d~0#1|)))) [2022-11-26 00:44:57,097 INFO L902 garLoopResultBuilder]: At program point L59(line 59) the Hoare annotation is: true [2022-11-26 00:44:57,097 INFO L895 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse1 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse2 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse3 (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|)) (.cse6 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (let ((.cse0 (div (- |ULTIMATE.start_main_~p~0#1|) (- 2)))) (and (<= 4 |ULTIMATE.start_main_~p~0#1|) (<= (* 2 (* |ULTIMATE.start_main_~B~0#1| (div (- .cse0) (- 2)))) |ULTIMATE.start_main_~r~0#1|) .cse1 .cse2 .cse3 (= |ULTIMATE.start_main_~d~0#1| (* 2 (* .cse0 |ULTIMATE.start_main_~B~0#1|))) (= 0 (mod .cse0 2)))) (let ((.cse5 (select |#memory_int| 1)) (.cse4 (select |#memory_int| 2))) (and (= (select .cse4 7) 0) (= (select |#length| 3) 12) (= 114 (select .cse4 2)) (= (select .cse4 6) 99) (= 97 (select .cse4 1)) (= 2 (select |#length| 1)) (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) (= (select |#valid| 3) 1) (= (select .cse4 4) 50) (= (ite (and (<= |ULTIMATE.start_main_~A~0#1| 2) (<= 0 |ULTIMATE.start_main_~A~0#1|)) 1 0) |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= 100 (select .cse4 3)) .cse1 (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select |#valid| 1) 1) .cse2 (= (select |#valid| 0) 0) (not (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (select .cse4 5) 46) (= (select |#valid| 2) 1) .cse3 (= |#NULL.offset| 0) (= 8 (select |#length| 2)) (= (select .cse5 0) 48) .cse6 (= (select .cse5 1) 0) (= (select .cse4 0) 104) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) (and .cse1 .cse2 (<= 1 |ULTIMATE.start_main_~r~0#1|) .cse3 .cse6 (= 2 |ULTIMATE.start_main_~d~0#1|)))) [2022-11-26 00:44:57,098 INFO L895 garLoopResultBuilder]: At program point L35-1(line 35) the Hoare annotation is: (let ((.cse1 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse2 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse3 (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|)) (.cse6 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (let ((.cse0 (div (- |ULTIMATE.start_main_~p~0#1|) (- 2)))) (and (<= 4 |ULTIMATE.start_main_~p~0#1|) (<= (* 2 (* |ULTIMATE.start_main_~B~0#1| (div (- .cse0) (- 2)))) |ULTIMATE.start_main_~r~0#1|) .cse1 .cse2 .cse3 (= |ULTIMATE.start_main_~d~0#1| (* 2 (* .cse0 |ULTIMATE.start_main_~B~0#1|))) (= 0 (mod .cse0 2)))) (let ((.cse5 (select |#memory_int| 1)) (.cse4 (select |#memory_int| 2))) (and (= (select .cse4 7) 0) (= (select |#length| 3) 12) (= 114 (select .cse4 2)) (= (select .cse4 6) 99) (= 97 (select .cse4 1)) (= 2 (select |#length| 1)) (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) (= (select |#valid| 3) 1) (= (select .cse4 4) 50) (= (ite (and (<= |ULTIMATE.start_main_~A~0#1| 2) (<= 0 |ULTIMATE.start_main_~A~0#1|)) 1 0) |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= 100 (select .cse4 3)) .cse1 (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select |#valid| 1) 1) .cse2 (= (select |#valid| 0) 0) (not (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (select .cse4 5) 46) (= (select |#valid| 2) 1) .cse3 (= |#NULL.offset| 0) (= 8 (select |#length| 2)) (= (select .cse5 0) 48) .cse6 (= (select .cse5 1) 0) (= (select .cse4 0) 104) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) (and .cse1 .cse2 (<= 1 |ULTIMATE.start_main_~r~0#1|) .cse3 .cse6 (= 2 |ULTIMATE.start_main_~d~0#1|)))) [2022-11-26 00:44:57,098 INFO L899 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2022-11-26 00:44:57,098 INFO L899 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2022-11-26 00:44:57,098 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-11-26 00:44:57,098 INFO L899 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2022-11-26 00:44:57,098 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2022-11-26 00:44:57,099 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2022-11-26 00:44:57,102 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:57,104 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-26 00:44:57,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 12:44:57 BoogieIcfgContainer [2022-11-26 00:44:57,148 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-26 00:44:57,157 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-26 00:44:57,157 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-26 00:44:57,158 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-26 00:44:57,158 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:34:49" (3/4) ... [2022-11-26 00:44:57,162 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-26 00:44:57,169 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-11-26 00:44:57,177 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2022-11-26 00:44:57,177 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2022-11-26 00:44:57,177 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-11-26 00:44:57,178 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-26 00:44:57,178 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-26 00:44:57,208 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((((((((((((((((((((((unknown-#memory_int-unknown[2][7] == 0 && unknown-#length-unknown[3] == 12) && 114 == unknown-#memory_int-unknown[2][2]) && unknown-#memory_int-unknown[2][6] == 99) && 97 == unknown-#memory_int-unknown[2][1]) && 2 == unknown-#length-unknown[1]) && B == d) && \valid[3] == 1) && unknown-#memory_int-unknown[2][4] == 50) && (if A <= 2 && 0 <= A then 1 else 0) == \old(cond)) && 100 == unknown-#memory_int-unknown[2][3]) && \old(cond) == cond) && \valid[1] == 1) && A == r) && \valid[0] == 0) && !(cond == 0)) && unknown-#memory_int-unknown[2][5] == 46) && \valid[2] == 1) && d == p) && #NULL == 0) && 8 == unknown-#length-unknown[2]) && unknown-#memory_int-unknown[1][0] == 48) && B * (p / 2) + B * q + r == d / 2 + A) && B == 1) && unknown-#memory_int-unknown[1][1] == 0) && unknown-#memory_int-unknown[2][0] == 104) && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0) || ((((((4 <= p && 2 * (B * (-(-p / -2) / -2)) <= r) && q == 0) && A == r) && d == p) && d == 2 * (-p / -2 * B)) && 0 == -p / -2 % 2)) || (((((q == 0 && A == r) && 1 <= r) && d == p) && B == 1) && 2 == d) [2022-11-26 00:44:57,218 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/witness.graphml [2022-11-26 00:44:57,218 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-26 00:44:57,219 INFO L158 Benchmark]: Toolchain (without parser) took 608104.30ms. Allocated memory was 188.7MB in the beginning and 503.3MB in the end (delta: 314.6MB). Free memory was 143.9MB in the beginning and 191.4MB in the end (delta: -47.5MB). Peak memory consumption was 269.5MB. Max. memory is 16.1GB. [2022-11-26 00:44:57,219 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 130.0MB. Free memory was 72.2MB in the beginning and 72.1MB in the end (delta: 117.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:44:57,220 INFO L158 Benchmark]: CACSL2BoogieTranslator took 284.58ms. Allocated memory is still 188.7MB. Free memory was 143.3MB in the beginning and 133.1MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-26 00:44:57,220 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.40ms. Allocated memory is still 188.7MB. Free memory was 133.1MB in the beginning and 131.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 00:44:57,221 INFO L158 Benchmark]: Boogie Preprocessor took 25.05ms. Allocated memory is still 188.7MB. Free memory was 131.6MB in the beginning and 130.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 00:44:57,221 INFO L158 Benchmark]: RCFGBuilder took 506.06ms. Allocated memory is still 188.7MB. Free memory was 130.1MB in the beginning and 116.9MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-26 00:44:57,222 INFO L158 Benchmark]: TraceAbstraction took 607178.84ms. Allocated memory was 188.7MB in the beginning and 503.3MB in the end (delta: 314.6MB). Free memory was 116.4MB in the beginning and 194.6MB in the end (delta: -78.2MB). Peak memory consumption was 267.6MB. Max. memory is 16.1GB. [2022-11-26 00:44:57,222 INFO L158 Benchmark]: Witness Printer took 61.41ms. Allocated memory is still 503.3MB. Free memory was 193.5MB in the beginning and 191.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 00:44:57,224 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 130.0MB. Free memory was 72.2MB in the beginning and 72.1MB in the end (delta: 117.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 284.58ms. Allocated memory is still 188.7MB. Free memory was 143.3MB in the beginning and 133.1MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.40ms. Allocated memory is still 188.7MB. Free memory was 133.1MB in the beginning and 131.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.05ms. Allocated memory is still 188.7MB. Free memory was 131.6MB in the beginning and 130.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 506.06ms. Allocated memory is still 188.7MB. Free memory was 130.1MB in the beginning and 116.9MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 607178.84ms. Allocated memory was 188.7MB in the beginning and 503.3MB in the end (delta: 314.6MB). Free memory was 116.4MB in the beginning and 194.6MB in the end (delta: -78.2MB). Peak memory consumption was 267.6MB. Max. memory is 16.1GB. * Witness Printer took 61.41ms. Allocated memory is still 503.3MB. Free memory was 193.5MB in the beginning and 191.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 607.0s, OverallIterations: 11, TraceHistogramMax: 16, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 279.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 14.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 21 mSolverCounterUnknown, 254 SdHoareTripleChecker+Valid, 86.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 205 mSDsluCounter, 709 SdHoareTripleChecker+Invalid, 85.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 14 IncrementalHoareTripleChecker+Unchecked, 476 mSDsCounter, 379 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2293 IncrementalHoareTripleChecker+Invalid, 2707 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 379 mSolverCounterUnsat, 233 mSDtfsCounter, 2293 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1464 GetRequests, 1189 SyntacticMatches, 39 SemanticMatches, 236 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2472 ImplicationChecksByTransitivity, 306.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=114occurred in iteration=10, InterpolantAutomatonStates: 112, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 11 MinimizatonAttempts, 40 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 66 PreInvPairs, 122 NumberOfFragments, 943 HoareAnnotationTreeSize, 66 FomulaSimplifications, 1687 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 11 FomulaSimplificationsInter, 20708 FormulaSimplificationTreeSizeReductionInter, 13.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 274.0s InterpolantComputationTime, 541 NumberOfCodeBlocks, 464 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 973 ConstructedInterpolants, 6 QuantifiedInterpolants, 12659 SizeOfPredicates, 38 NumberOfNonLiveVariables, 1307 ConjunctsInSsa, 242 ConjunctsInUnsatCore, 19 InterpolantComputations, 3 PerfectInterpolantSequences, 3146/3559 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 0.8s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 11, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 9, TOOLS_POST_TIME: 0.1s, TOOLS_POST_CALL_APPLICATIONS: 7, TOOLS_POST_CALL_TIME: 0.3s, TOOLS_POST_RETURN_APPLICATIONS: 4, TOOLS_POST_RETURN_TIME: 0.1s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 20, TOOLS_QUANTIFIERELIM_TIME: 0.4s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 29, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 8, DOMAIN_JOIN_TIME: 0.2s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 11, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 4, CALL_SUMMARIZER_CACHE_MISSES: 1, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 65, DAG_COMPRESSION_RETAINED_NODES: 33, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: ((1 <= p && A == q + r) && d == p) && B == 1 - InvariantResult [Line: 59]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((unknown-#memory_int-unknown[2][7] == 0 && unknown-#length-unknown[3] == 12) && 114 == unknown-#memory_int-unknown[2][2]) && unknown-#memory_int-unknown[2][6] == 99) && 97 == unknown-#memory_int-unknown[2][1]) && 2 == unknown-#length-unknown[1]) && B == d) && \valid[3] == 1) && unknown-#memory_int-unknown[2][4] == 50) && (if A <= 2 && 0 <= A then 1 else 0) == \old(cond)) && 100 == unknown-#memory_int-unknown[2][3]) && \old(cond) == cond) && \valid[1] == 1) && A == r) && \valid[0] == 0) && !(cond == 0)) && unknown-#memory_int-unknown[2][5] == 46) && \valid[2] == 1) && d == p) && #NULL == 0) && 8 == unknown-#length-unknown[2]) && unknown-#memory_int-unknown[1][0] == 48) && B * (p / 2) + B * q + r == d / 2 + A) && B == 1) && unknown-#memory_int-unknown[1][1] == 0) && unknown-#memory_int-unknown[2][0] == 104) && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0) || ((((((4 <= p && 2 * (B * (-(-p / -2) / -2)) <= r) && q == 0) && A == r) && d == p) && d == 2 * (-p / -2 * B)) && 0 == -p / -2 % 2)) || (((((q == 0 && A == r) && 1 <= r) && d == p) && B == 1) && 2 == d) RESULT: Ultimate proved your program to be correct! [2022-11-26 00:44:57,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86ea125c-cd52-4f7b-9ae3-77622dab16fa/bin/utaipan-ByfvJB40ur/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 Writing output log to file Ultimate.log Result: TRUE