./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --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 870f3f117c59e986b23526e49a2d44ed8c8e543941d3d310e77e3939c7927e70 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 12:31:28,854 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 12:31:28,917 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 12:31:28,921 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 12:31:28,922 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 12:31:28,945 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 12:31:28,945 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 12:31:28,946 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 12:31:28,946 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 12:31:28,947 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 12:31:28,947 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 12:31:28,948 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 12:31:28,948 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 12:31:28,949 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 12:31:28,949 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 12:31:28,950 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 12:31:28,950 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 12:31:28,951 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 12:31:28,951 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 12:31:28,952 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 12:31:28,953 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 12:31:28,953 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 12:31:28,954 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 12:31:28,955 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 12:31:28,955 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 12:31:28,955 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 12:31:28,956 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 12:31:28,956 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 12:31:28,957 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 12:31:28,957 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 12:31:28,957 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 12:31:28,958 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 12:31:28,958 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 12:31:28,958 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 12:31:28,958 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 12:31:28,958 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 12:31:28,959 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 12:31:28,959 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:31:28,959 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 12:31:28,959 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 12:31:28,959 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 12:31:28,960 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 12:31:28,960 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 12:31:28,960 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 12:31:28,960 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 12:31:28,960 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 12:31:28,961 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 12:31:28,961 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 870f3f117c59e986b23526e49a2d44ed8c8e543941d3d310e77e3939c7927e70 [2023-12-02 12:31:29,166 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 12:31:29,186 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 12:31:29,189 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 12:31:29,190 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 12:31:29,191 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 12:31:29,192 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c [2023-12-02 12:31:32,034 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 12:31:32,206 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 12:31:32,207 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c [2023-12-02 12:31:32,214 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/data/b1bd6d1f3/443c35fa2afe48398c540dde6d6968fb/FLAG26b1a7fca [2023-12-02 12:31:32,227 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/data/b1bd6d1f3/443c35fa2afe48398c540dde6d6968fb [2023-12-02 12:31:32,230 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 12:31:32,231 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 12:31:32,232 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 12:31:32,232 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 12:31:32,237 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 12:31:32,238 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:31:32" (1/1) ... [2023-12-02 12:31:32,239 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@242d2aa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:31:32, skipping insertion in model container [2023-12-02 12:31:32,239 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:31:32" (1/1) ... [2023-12-02 12:31:32,260 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 12:31:32,393 WARN L240 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_a92f14cc-b99d-4952-ada4-96d0aa55cce4/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c[458,471] [2023-12-02 12:31:32,409 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:31:32,417 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 12:31:32,427 WARN L240 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_a92f14cc-b99d-4952-ada4-96d0aa55cce4/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c[458,471] [2023-12-02 12:31:32,434 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:31:32,447 INFO L206 MainTranslator]: Completed translation [2023-12-02 12:31:32,447 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:31:32 WrapperNode [2023-12-02 12:31:32,447 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 12:31:32,448 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 12:31:32,448 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 12:31:32,448 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 12:31:32,454 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:31:32" (1/1) ... [2023-12-02 12:31:32,459 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:31:32" (1/1) ... [2023-12-02 12:31:32,473 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 39 [2023-12-02 12:31:32,474 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 12:31:32,475 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 12:31:32,475 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 12:31:32,475 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 12:31:32,481 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:31:32" (1/1) ... [2023-12-02 12:31:32,481 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:31:32" (1/1) ... [2023-12-02 12:31:32,482 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:31:32" (1/1) ... [2023-12-02 12:31:32,482 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:31:32" (1/1) ... [2023-12-02 12:31:32,485 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:31:32" (1/1) ... [2023-12-02 12:31:32,488 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:31:32" (1/1) ... [2023-12-02 12:31:32,489 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:31:32" (1/1) ... [2023-12-02 12:31:32,490 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:31:32" (1/1) ... [2023-12-02 12:31:32,491 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 12:31:32,492 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 12:31:32,492 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 12:31:32,493 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 12:31:32,493 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:31:32" (1/1) ... [2023-12-02 12:31:32,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:31:32,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:31:32,527 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 12:31:32,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 12:31:32,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 12:31:32,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 12:31:32,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 12:31:32,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 12:31:32,560 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 12:31:32,560 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 12:31:32,619 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 12:31:32,621 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 12:31:32,729 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 12:31:32,752 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 12:31:32,752 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 12:31:32,754 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:31:32 BoogieIcfgContainer [2023-12-02 12:31:32,754 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 12:31:32,757 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 12:31:32,757 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 12:31:32,760 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 12:31:32,760 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:31:32" (1/3) ... [2023-12-02 12:31:32,761 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@626d8167 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:31:32, skipping insertion in model container [2023-12-02 12:31:32,761 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:31:32" (2/3) ... [2023-12-02 12:31:32,761 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@626d8167 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:31:32, skipping insertion in model container [2023-12-02 12:31:32,761 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:31:32" (3/3) ... [2023-12-02 12:31:32,762 INFO L112 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound50.c [2023-12-02 12:31:32,777 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 12:31:32,777 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 12:31:32,818 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 12:31:32,823 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=LoopHeads, 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;@5a78fe18, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 12:31:32,824 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 12:31:32,827 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 12:31:32,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 12:31:32,833 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:31:32,834 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 12:31:32,834 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:31:32,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:31:32,839 INFO L85 PathProgramCache]: Analyzing trace with hash -2070802916, now seen corresponding path program 1 times [2023-12-02 12:31:32,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:31:32,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508224471] [2023-12-02 12:31:32,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:31:32,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:31:32,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:31:32,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:31:32,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508224471] [2023-12-02 12:31:32,936 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-02 12:31:32,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103416690] [2023-12-02 12:31:32,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:31:32,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:31:32,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:31:32,940 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:31:32,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 12:31:32,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:31:32,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-02 12:31:32,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:31:33,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:31:33,019 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:31:33,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103416690] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:31:33,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:31:33,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 12:31:33,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013148383] [2023-12-02 12:31:33,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:31:33,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 12:31:33,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:31:33,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 12:31:33,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 12:31:33,051 INFO L87 Difference]: Start difference. First operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 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) [2023-12-02 12:31:33,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:31:33,071 INFO L93 Difference]: Finished difference Result 29 states and 42 transitions. [2023-12-02 12:31:33,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 12:31:33,073 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 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 [2023-12-02 12:31:33,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:31:33,078 INFO L225 Difference]: With dead ends: 29 [2023-12-02 12:31:33,078 INFO L226 Difference]: Without dead ends: 13 [2023-12-02 12:31:33,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 12:31:33,084 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:31:33,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:31:33,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-12-02 12:31:33,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-12-02 12:31:33,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 12:31:33,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2023-12-02 12:31:33,112 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 6 [2023-12-02 12:31:33,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:31:33,112 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2023-12-02 12:31:33,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 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) [2023-12-02 12:31:33,113 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2023-12-02 12:31:33,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 12:31:33,114 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:31:33,122 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:31:33,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 12:31:33,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-02 12:31:33,324 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:31:33,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:31:33,325 INFO L85 PathProgramCache]: Analyzing trace with hash -170804699, now seen corresponding path program 1 times [2023-12-02 12:31:33,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:31:33,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962745561] [2023-12-02 12:31:33,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:31:33,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:31:33,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:31:33,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:31:33,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962745561] [2023-12-02 12:31:33,358 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-02 12:31:33,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880371368] [2023-12-02 12:31:33,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:31:33,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:31:33,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:31:33,360 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:31:33,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 12:31:33,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:31:33,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 12:31:33,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:31:33,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:31:33,448 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:31:33,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880371368] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:31:33,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:31:33,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:31:33,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277633972] [2023-12-02 12:31:33,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:31:33,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:31:33,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:31:33,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:31:33,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:31:33,451 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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) [2023-12-02 12:31:33,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:31:33,468 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2023-12-02 12:31:33,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:31:33,468 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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 7 [2023-12-02 12:31:33,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:31:33,469 INFO L225 Difference]: With dead ends: 23 [2023-12-02 12:31:33,469 INFO L226 Difference]: Without dead ends: 15 [2023-12-02 12:31:33,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:31:33,471 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:31:33,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:31:33,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-12-02 12:31:33,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-12-02 12:31:33,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 12:31:33,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2023-12-02 12:31:33,477 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 7 [2023-12-02 12:31:33,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:31:33,477 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2023-12-02 12:31:33,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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) [2023-12-02 12:31:33,478 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2023-12-02 12:31:33,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 12:31:33,478 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:31:33,478 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:31:33,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 12:31:33,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:31:33,679 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:31:33,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:31:33,680 INFO L85 PathProgramCache]: Analyzing trace with hash -169017239, now seen corresponding path program 1 times [2023-12-02 12:31:33,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:31:33,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727453009] [2023-12-02 12:31:33,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:31:33,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:31:33,692 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:31:33,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1671969567] [2023-12-02 12:31:33,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:31:33,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:31:33,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:31:33,694 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:31:33,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 12:31:33,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:31:33,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 12:31:33,736 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:31:33,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:31:33,787 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:31:33,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:31:33,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727453009] [2023-12-02 12:31:33,788 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:31:33,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671969567] [2023-12-02 12:31:33,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671969567] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:31:33,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:31:33,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 12:31:33,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716765034] [2023-12-02 12:31:33,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:31:33,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 12:31:33,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:31:33,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 12:31:33,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 12:31:33,790 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 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) [2023-12-02 12:31:33,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:31:33,846 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2023-12-02 12:31:33,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 12:31:33,847 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 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 7 [2023-12-02 12:31:33,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:31:33,847 INFO L225 Difference]: With dead ends: 25 [2023-12-02 12:31:33,848 INFO L226 Difference]: Without dead ends: 21 [2023-12-02 12:31:33,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:31:33,850 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:31:33,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 45 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:31:33,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-02 12:31:33,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-12-02 12:31:33,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 12:31:33,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2023-12-02 12:31:33,857 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 7 [2023-12-02 12:31:33,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:31:33,858 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2023-12-02 12:31:33,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 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) [2023-12-02 12:31:33,858 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2023-12-02 12:31:33,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 12:31:33,859 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:31:33,859 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:31:33,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-02 12:31:34,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:31:34,064 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:31:34,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:31:34,065 INFO L85 PathProgramCache]: Analyzing trace with hash 867499275, now seen corresponding path program 1 times [2023-12-02 12:31:34,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:31:34,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208572272] [2023-12-02 12:31:34,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:31:34,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:31:34,075 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:31:34,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [812746284] [2023-12-02 12:31:34,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:31:34,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:31:34,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:31:34,077 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:31:34,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 12:31:34,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:31:34,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 12:31:34,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:31:34,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:31:34,161 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:31:34,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:31:34,207 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:31:34,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208572272] [2023-12-02 12:31:34,207 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:31:34,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812746284] [2023-12-02 12:31:34,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812746284] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:31:34,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1533398818] [2023-12-02 12:31:34,227 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-12-02 12:31:34,227 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:31:34,230 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:31:34,236 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:31:34,237 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:31:35,350 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 78 for LOIs [2023-12-02 12:31:35,543 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:31:36,619 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '348#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (or (exists ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_10| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_10| Int)) (and (exists ((|v_ULTIMATE.start_main_#t~post5#1_22| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 0 (+ |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_10| 32768)) (<= 1 ~counter~0) (<= 0 |v_ULTIMATE.start_main_#t~post5#1_22|) (<= |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_10| 32767) (<= 0 |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_11|) (<= |v_ULTIMATE.start_main_#t~post5#1_22| 49) (<= 0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11|) (<= 0 |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_10|))) (not (= (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_11| 4) (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11|) (* (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11|) 2)))))) (exists ((|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_8| Int)) (and (<= 0 |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_7|) (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|) (<= |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_7| 32767) (<= 1 ~counter~0) (<= 0 |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_8|) (<= 0 (+ |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_7| 32768)) (not (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|) (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_7| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|)))))))' at error location [2023-12-02 12:31:36,619 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:31:36,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:31:36,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-12-02 12:31:36,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704865002] [2023-12-02 12:31:36,620 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:31:36,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 12:31:36,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:31:36,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 12:31:36,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2023-12-02 12:31:36,623 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 12:31:36,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:31:36,735 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2023-12-02 12:31:36,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 12:31:36,735 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2023-12-02 12:31:36,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:31:36,736 INFO L225 Difference]: With dead ends: 55 [2023-12-02 12:31:36,736 INFO L226 Difference]: Without dead ends: 47 [2023-12-02 12:31:36,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2023-12-02 12:31:36,739 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:31:36,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 69 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:31:36,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-12-02 12:31:36,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2023-12-02 12:31:36,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.25) internal successors, (35), 31 states have internal predecessors, (35), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 12:31:36,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2023-12-02 12:31:36,749 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 15 [2023-12-02 12:31:36,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:31:36,750 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2023-12-02 12:31:36,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 12:31:36,750 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2023-12-02 12:31:36,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 12:31:36,751 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:31:36,751 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:31:36,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-02 12:31:36,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:31:36,953 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:31:36,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:31:36,953 INFO L85 PathProgramCache]: Analyzing trace with hash 869286735, now seen corresponding path program 1 times [2023-12-02 12:31:36,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:31:36,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808237283] [2023-12-02 12:31:36,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:31:36,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:31:36,960 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:31:36,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1915874676] [2023-12-02 12:31:36,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:31:36,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:31:36,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:31:36,962 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:31:36,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 12:31:37,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:31:37,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 12:31:37,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:31:37,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:31:37,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:31:37,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:31:37,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:31:37,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808237283] [2023-12-02 12:31:37,164 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:31:37,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915874676] [2023-12-02 12:31:37,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915874676] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:31:37,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1821332515] [2023-12-02 12:31:37,167 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 12:31:37,167 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:31:37,167 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:31:37,168 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:31:37,168 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:31:37,607 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 51 for LOIs [2023-12-02 12:31:37,666 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:31:38,327 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '597#(and (exists ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_23| Int) (|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_19| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_23| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_19| Int)) (and (exists ((|v_ULTIMATE.start_main_#t~post5#1_27| Int)) (and (<= 0 (+ |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_19| 32768)) (<= |v_ULTIMATE.start_main_#t~post5#1_27| 49) (<= 1 |#StackHeapBarrier|) (<= |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_19| 32767) (<= 0 |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_19|) (<= 0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_23|) (<= 0 |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_23|) (<= 0 |v_ULTIMATE.start_main_#t~post5#1_27|) (<= 1 ~counter~0))) (not (= (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_23| 4) (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_23| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_23|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_23| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_23| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_23| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_23|) (* 2 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_23| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_23| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_23|))))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 12:31:38,327 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:31:38,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:31:38,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2023-12-02 12:31:38,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44244879] [2023-12-02 12:31:38,328 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:31:38,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 12:31:38,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:31:38,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 12:31:38,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-12-02 12:31:38,330 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 12:31:38,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:31:38,432 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2023-12-02 12:31:38,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 12:31:38,433 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2023-12-02 12:31:38,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:31:38,434 INFO L225 Difference]: With dead ends: 57 [2023-12-02 12:31:38,434 INFO L226 Difference]: Without dead ends: 46 [2023-12-02 12:31:38,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2023-12-02 12:31:38,436 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:31:38,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 53 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:31:38,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-12-02 12:31:38,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2023-12-02 12:31:38,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 12:31:38,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2023-12-02 12:31:38,447 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 15 [2023-12-02 12:31:38,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:31:38,448 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2023-12-02 12:31:38,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 12:31:38,448 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2023-12-02 12:31:38,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-02 12:31:38,449 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:31:38,449 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-12-02 12:31:38,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 12:31:38,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:31:38,650 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:31:38,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:31:38,650 INFO L85 PathProgramCache]: Analyzing trace with hash 24753612, now seen corresponding path program 1 times [2023-12-02 12:31:38,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:31:38,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505431385] [2023-12-02 12:31:38,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:31:38,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:31:38,659 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:31:38,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [666058006] [2023-12-02 12:31:38,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:31:38,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:31:38,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:31:38,660 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:31:38,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 12:31:38,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:31:38,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 12:31:38,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:31:38,850 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 12:31:38,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:31:39,095 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 12:31:39,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:31:39,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505431385] [2023-12-02 12:31:39,096 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:31:39,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666058006] [2023-12-02 12:31:39,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666058006] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:31:39,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [469295031] [2023-12-02 12:31:39,098 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-12-02 12:31:39,098 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:31:39,099 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:31:39,099 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:31:39,099 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:31:39,616 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 87 for LOIs [2023-12-02 12:31:39,854 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:31:40,982 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '879#(and (or (exists ((|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_36| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_31| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_37| Int) (|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_32| Int)) (and (= (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_36| 4) (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_37| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_37|) (* (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_37| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_37| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_37|) 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_37| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_37| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_37| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_37|))) (<= |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_31| |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_32|) (not (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_37| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_31|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_37| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_37|))) (exists ((|v_ULTIMATE.start_main_#t~post5#1_33| Int)) (and (<= 1 |#StackHeapBarrier|) (<= |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_31| 32767) (<= 0 |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_32|) (<= 0 (+ |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_31| 32768)) (<= 1 ~counter~0) (<= |v_ULTIMATE.start_main_#t~post5#1_33| 49) (<= 0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_37|) (<= 0 |v_ULTIMATE.start_main_#t~post5#1_33|))))) (exists ((|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_37| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_32| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_38| Int) (|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_33| Int)) (and (not (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_38| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_38|) (* 2 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_38| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_38| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_38|)) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_38| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_38| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_38| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_38|)) (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_37| 4))) (exists ((|v_ULTIMATE.start_main_#t~post5#1_33| Int)) (and (<= 0 (+ |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_32| 32768)) (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_38|) (<= 1 ~counter~0) (<= |v_ULTIMATE.start_main_#t~post5#1_33| 49) (<= |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_32| 32767) (<= 0 |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_33|) (<= 0 |v_ULTIMATE.start_main_#t~post5#1_33|) (<= 0 |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_37|)))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 12:31:40,982 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:31:40,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:31:40,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-12-02 12:31:40,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272196893] [2023-12-02 12:31:40,982 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:31:40,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 12:31:40,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:31:40,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 12:31:40,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2023-12-02 12:31:40,984 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 16 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 12:31:41,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:31:41,237 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2023-12-02 12:31:41,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 12:31:41,238 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 21 [2023-12-02 12:31:41,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:31:41,239 INFO L225 Difference]: With dead ends: 49 [2023-12-02 12:31:41,239 INFO L226 Difference]: Without dead ends: 42 [2023-12-02 12:31:41,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2023-12-02 12:31:41,240 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 20 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:31:41,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 71 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:31:41,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-12-02 12:31:41,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2023-12-02 12:31:41,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 12:31:41,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2023-12-02 12:31:41,247 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 21 [2023-12-02 12:31:41,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:31:41,247 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2023-12-02 12:31:41,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 12:31:41,248 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2023-12-02 12:31:41,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-02 12:31:41,249 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:31:41,249 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2023-12-02 12:31:41,253 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 12:31:41,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:31:41,450 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:31:41,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:31:41,450 INFO L85 PathProgramCache]: Analyzing trace with hash -795795011, now seen corresponding path program 2 times [2023-12-02 12:31:41,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:31:41,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323795447] [2023-12-02 12:31:41,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:31:41,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:31:41,457 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:31:41,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1413255395] [2023-12-02 12:31:41,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:31:41,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:31:41,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:31:41,458 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:31:41,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 12:31:41,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 12:31:41,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:31:41,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 12:31:41,516 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:31:41,570 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:31:41,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:31:41,645 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 12:31:41,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:31:41,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323795447] [2023-12-02 12:31:41,645 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:31:41,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413255395] [2023-12-02 12:31:41,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413255395] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:31:41,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [736996987] [2023-12-02 12:31:41,647 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-12-02 12:31:41,648 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:31:41,648 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:31:41,648 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:31:41,648 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:31:42,067 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 78 for LOIs [2023-12-02 12:31:42,203 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:31:43,194 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1269#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (or (exists ((|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_47| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_42| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48| Int) (|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_43| Int)) (and (not (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48|) (* 2 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48|))) (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_47| 4))) (exists ((|v_ULTIMATE.start_main_#t~post5#1_44| Int)) (and (<= 1 |#StackHeapBarrier|) (<= |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_42| 32767) (<= 0 (+ |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_42| 32768)) (<= |v_ULTIMATE.start_main_#t~post5#1_44| 49) (<= 1 ~counter~0) (<= 0 |v_ULTIMATE.start_main_#t~post5#1_44|) (<= 0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48|) (<= 0 |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_47|) (<= 0 |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_43|))))) (exists ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_45| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_44| Int) (|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_40| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_39| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_40|) (<= 0 (+ |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_39| 32768)) (<= |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_39| 32767) (<= 0 |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_44|) (<= 1 ~counter~0) (<= 0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_45|) (not (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_45| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_39|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_45| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_45|)))))))' at error location [2023-12-02 12:31:43,194 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:31:43,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:31:43,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-12-02 12:31:43,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207854886] [2023-12-02 12:31:43,194 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:31:43,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 12:31:43,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:31:43,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 12:31:43,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2023-12-02 12:31:43,197 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 12:31:43,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:31:43,405 INFO L93 Difference]: Finished difference Result 118 states and 124 transitions. [2023-12-02 12:31:43,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-02 12:31:43,405 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 39 [2023-12-02 12:31:43,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:31:43,406 INFO L225 Difference]: With dead ends: 118 [2023-12-02 12:31:43,407 INFO L226 Difference]: Without dead ends: 113 [2023-12-02 12:31:43,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2023-12-02 12:31:43,408 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 49 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:31:43,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 96 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:31:43,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-12-02 12:31:43,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 88. [2023-12-02 12:31:43,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.106060606060606) internal successors, (73), 66 states have internal predecessors, (73), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 12:31:43,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2023-12-02 12:31:43,420 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 39 [2023-12-02 12:31:43,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:31:43,420 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2023-12-02 12:31:43,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 12:31:43,420 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2023-12-02 12:31:43,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 12:31:43,421 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:31:43,421 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1] [2023-12-02 12:31:43,426 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 12:31:43,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-12-02 12:31:43,622 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:31:43,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:31:43,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1312813826, now seen corresponding path program 2 times [2023-12-02 12:31:43,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:31:43,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140616531] [2023-12-02 12:31:43,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:31:43,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:31:43,631 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:31:43,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1978084986] [2023-12-02 12:31:43,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:31:43,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:31:43,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:31:43,633 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:31:43,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 12:31:43,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 12:31:43,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:31:43,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-02 12:31:43,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:31:43,816 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 21 proven. 41 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 12:31:43,816 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:32:09,990 WARN L876 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_45| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| 3)) 4) 0) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_45|))))) is different from true [2023-12-02 12:32:28,032 WARN L876 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_45| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| 3)) 4) 0) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_45|)))) (= c___VERIFIER_assert_~cond 0)) is different from true [2023-12-02 12:32:36,089 WARN L854 $PredicateComparison]: unable to prove that (or (= (+ |c_ULTIMATE.start_main_~y~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (+ |c_ULTIMATE.start_main_~c~0#1| (* |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2023-12-02 12:32:46,139 WARN L854 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0)) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2)) (+ (* |c_ULTIMATE.start_main_~c~0#1| 2) (* |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~y~0#1|)))) is different from false [2023-12-02 12:32:56,188 WARN L854 $PredicateComparison]: unable to prove that (or (= (+ (* |c_ULTIMATE.start_main_~c~0#1| 3) (* |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 3))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2023-12-02 12:33:06,237 WARN L854 $PredicateComparison]: unable to prove that (or (= (+ (* |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~c~0#1| 4)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 4))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2023-12-02 12:33:12,277 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 41 not checked. [2023-12-02 12:33:12,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:33:12,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140616531] [2023-12-02 12:33:12,278 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:33:12,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978084986] [2023-12-02 12:33:12,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978084986] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:33:12,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1562160222] [2023-12-02 12:33:12,279 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-12-02 12:33:12,279 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:33:12,279 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:33:12,279 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:33:12,280 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:33:12,747 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 87 for LOIs [2023-12-02 12:33:12,903 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:33:14,046 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1866#(and (or (exists ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_54| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_57| Int) (|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_62| Int)) (and (<= |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_54| |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_62|) (exists ((|v_ULTIMATE.start_main_#t~post5#1_53| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 0 (+ |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_54| 32768)) (<= 0 |v_ULTIMATE.start_main_#t~post5#1_53|) (<= 0 |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_62|) (<= 1 ~counter~0) (<= 0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68|) (<= |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_54| 32767) (<= |v_ULTIMATE.start_main_#t~post5#1_53| 49))) (not (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_54|))) (= (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_57| 4) (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68|) (* (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68|) 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68|))))) (exists ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_58| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_55| Int) (|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_63| Int)) (and (exists ((|v_ULTIMATE.start_main_#t~post5#1_53| Int)) (and (<= 0 |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_58|) (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_main_#t~post5#1_53|) (<= |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_55| 32767) (<= 1 ~counter~0) (<= 0 (+ |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_55| 32768)) (<= 0 |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_63|) (<= 0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69|) (<= |v_ULTIMATE.start_main_#t~post5#1_53| 49))) (not (= (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_58| 4) (+ (* 2 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69|)) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69|))))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 12:33:14,046 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:33:14,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:33:14,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2023-12-02 12:33:14,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303983006] [2023-12-02 12:33:14,047 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:33:14,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-02 12:33:14,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:33:14,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-02 12:33:14,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=529, Unknown=7, NotChecked=306, Total=930 [2023-12-02 12:33:14,049 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand has 22 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 12:33:14,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:33:14,339 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2023-12-02 12:33:14,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 12:33:14,340 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 45 [2023-12-02 12:33:14,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:33:14,341 INFO L225 Difference]: With dead ends: 93 [2023-12-02 12:33:14,341 INFO L226 Difference]: Without dead ends: 88 [2023-12-02 12:33:14,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=125, Invalid=822, Unknown=7, NotChecked=378, Total=1332 [2023-12-02 12:33:14,343 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:33:14,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 247 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 184 Invalid, 0 Unknown, 184 Unchecked, 0.1s Time] [2023-12-02 12:33:14,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-12-02 12:33:14,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-12-02 12:33:14,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 66 states have internal predecessors, (72), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 12:33:14,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2023-12-02 12:33:14,356 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 45 [2023-12-02 12:33:14,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:33:14,356 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2023-12-02 12:33:14,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 12:33:14,356 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2023-12-02 12:33:14,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-02 12:33:14,358 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:33:14,358 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1] [2023-12-02 12:33:14,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 12:33:14,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:33:14,558 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:33:14,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:33:14,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1140847460, now seen corresponding path program 3 times [2023-12-02 12:33:14,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:33:14,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406840599] [2023-12-02 12:33:14,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:33:14,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:33:14,565 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:33:14,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [550366076] [2023-12-02 12:33:14,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 12:33:14,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:33:14,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:33:14,567 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:33:14,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 12:33:14,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 12:33:14,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:33:14,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-02 12:33:14,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:33:14,807 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 11 proven. 76 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 12:33:14,807 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:33:19,037 WARN L854 $PredicateComparison]: unable to prove that (or (= (+ (* |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~c~0#1| 5)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 5))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2023-12-02 12:33:37,087 WARN L876 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82| Int) (|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_75| Int)) (or (= (+ (* |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_75| 5) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82| |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_75|)) (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82| 5) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82|))) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82| 2)) 4) 0)))) is different from true [2023-12-02 12:33:55,131 WARN L876 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (= c___VERIFIER_assert_~cond 0) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82| Int) (|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_75| Int)) (or (= (+ (* |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_75| 5) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82| |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_75|)) (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82| 5) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82|))) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_82| 2)) 4) 0)))) is different from true [2023-12-02 12:33:59,151 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 11 proven. 45 refuted. 15 times theorem prover too weak. 45 trivial. 16 not checked. [2023-12-02 12:33:59,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:33:59,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406840599] [2023-12-02 12:33:59,152 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:33:59,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550366076] [2023-12-02 12:33:59,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550366076] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:33:59,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [910131003] [2023-12-02 12:33:59,154 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-12-02 12:33:59,154 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:33:59,154 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:33:59,154 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:33:59,154 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:33:59,569 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 87 for LOIs [2023-12-02 12:33:59,720 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:34:01,031 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2474#(and (or (exists ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_67| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_68| Int) (|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_84| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_91| Int)) (and (not (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_91| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_67|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_91| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_91|))) (= (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_68| 4) (+ (* 2 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_91| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_91| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_91|)) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_91| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_91| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_91| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_91|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_91| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_91|))) (exists ((|v_ULTIMATE.start_main_#t~post5#1_63| Int)) (and (<= |v_ULTIMATE.start_main_#t~post5#1_63| 49) (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_84|) (<= 1 ~counter~0) (<= |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_67| 32767) (<= 0 (+ |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_67| 32768)) (<= 0 |v_ULTIMATE.start_main_#t~post5#1_63|) (<= 0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_91|))) (<= |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_67| |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_84|))) (exists ((|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_69| Int) (|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_85| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_92| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_68| Int)) (and (exists ((|v_ULTIMATE.start_main_#t~post5#1_63| Int)) (and (<= 0 |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_69|) (<= |v_ULTIMATE.start_main_#t~post5#1_63| 49) (<= 1 |#StackHeapBarrier|) (<= |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_68| 32767) (<= 0 (+ |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_68| 32768)) (<= 0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_92|) (<= 0 |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_85|) (<= 1 ~counter~0) (<= 0 |v_ULTIMATE.start_main_#t~post5#1_63|))) (not (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_92| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_92|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_92| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_92| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_92| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_92|) (* 2 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_92| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_92| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_92|))) (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_69| 4)))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 12:34:01,031 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:34:01,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:34:01,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2023-12-02 12:34:01,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369143640] [2023-12-02 12:34:01,032 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:34:01,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-02 12:34:01,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:34:01,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-02 12:34:01,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=767, Unknown=3, NotChecked=174, Total=1056 [2023-12-02 12:34:01,034 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand has 24 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 12:34:01,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:34:01,579 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2023-12-02 12:34:01,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 12:34:01,579 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 53 [2023-12-02 12:34:01,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:34:01,580 INFO L225 Difference]: With dead ends: 94 [2023-12-02 12:34:01,581 INFO L226 Difference]: Without dead ends: 88 [2023-12-02 12:34:01,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=211, Invalid=1358, Unknown=3, NotChecked=234, Total=1806 [2023-12-02 12:34:01,582 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 28 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:34:01,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 241 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 199 Invalid, 0 Unknown, 126 Unchecked, 0.2s Time] [2023-12-02 12:34:01,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-12-02 12:34:01,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-12-02 12:34:01,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 12:34:01,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2023-12-02 12:34:01,594 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 53 [2023-12-02 12:34:01,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:34:01,595 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2023-12-02 12:34:01,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 12:34:01,595 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2023-12-02 12:34:01,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-12-02 12:34:01,596 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:34:01,596 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2023-12-02 12:34:01,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 12:34:01,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:34:01,797 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:34:01,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:34:01,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1242040609, now seen corresponding path program 3 times [2023-12-02 12:34:01,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:34:01,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082035882] [2023-12-02 12:34:01,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:34:01,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:34:01,804 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:34:01,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [633676090] [2023-12-02 12:34:01,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 12:34:01,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:34:01,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:34:01,806 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:34:01,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 12:34:02,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 12:34:02,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:34:02,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-02 12:34:02,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:34:02,204 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:34:02,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:34:02,427 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 200 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-12-02 12:34:02,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:34:02,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082035882] [2023-12-02 12:34:02,427 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:34:02,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633676090] [2023-12-02 12:34:02,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633676090] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:34:02,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1371253238] [2023-12-02 12:34:02,429 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-12-02 12:34:02,429 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:34:02,430 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:34:02,430 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:34:02,430 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:34:02,798 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 78 for LOIs [2023-12-02 12:34:02,889 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:34:03,769 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3298#(and (or (exists ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_78| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_102| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_79| Int) (|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_95| Int)) (and (not (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_102| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_102| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_102| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_102|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_102| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_102|) (* 2 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_102| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_102| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_102|))) (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_79| 4))) (exists ((|v_ULTIMATE.start_main_#t~post5#1_80| Int)) (and (<= 0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_102|) (<= 1 |#StackHeapBarrier|) (<= |v_ULTIMATE.start_main_#t~post5#1_80| 49) (<= 0 |v_ULTIMATE.start_main_#t~post5#1_80|) (<= 0 |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_79|) (<= 0 |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_95|) (<= 1 ~counter~0) (<= 0 (+ |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_78| 32768)) (<= |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_78| 32767))))) (exists ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_75| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_99| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_76| Int) (|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_92| Int)) (and (<= 0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_99|) (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_76|) (<= 1 ~counter~0) (not (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_75|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_99|))) (<= |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_75| 32767) (<= 0 |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_92|) (<= 0 (+ |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_75| 32768))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 12:34:03,769 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:34:03,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:34:03,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2023-12-02 12:34:03,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912228570] [2023-12-02 12:34:03,769 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:34:03,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-02 12:34:03,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:34:03,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-02 12:34:03,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=880, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 12:34:03,772 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-12-02 12:34:04,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:34:04,303 INFO L93 Difference]: Finished difference Result 189 states and 200 transitions. [2023-12-02 12:34:04,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-12-02 12:34:04,304 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 87 [2023-12-02 12:34:04,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:34:04,306 INFO L225 Difference]: With dead ends: 189 [2023-12-02 12:34:04,306 INFO L226 Difference]: Without dead ends: 184 [2023-12-02 12:34:04,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=825, Invalid=2255, Unknown=0, NotChecked=0, Total=3080 [2023-12-02 12:34:04,308 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 89 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:34:04,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 130 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:34:04,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-12-02 12:34:04,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2023-12-02 12:34:04,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 138 states have (on average 1.0072463768115942) internal successors, (139), 138 states have internal predecessors, (139), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-12-02 12:34:04,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 184 transitions. [2023-12-02 12:34:04,347 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 184 transitions. Word has length 87 [2023-12-02 12:34:04,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:34:04,347 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 184 transitions. [2023-12-02 12:34:04,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-12-02 12:34:04,348 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 184 transitions. [2023-12-02 12:34:04,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-12-02 12:34:04,351 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:34:04,351 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1] [2023-12-02 12:34:04,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 12:34:04,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 12:34:04,554 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:34:04,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:34:04,555 INFO L85 PathProgramCache]: Analyzing trace with hash 539512809, now seen corresponding path program 4 times [2023-12-02 12:34:04,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:34:04,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866642081] [2023-12-02 12:34:04,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:34:04,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:34:04,566 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:34:04,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1978956609] [2023-12-02 12:34:04,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 12:34:04,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:34:04,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:34:04,567 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:34:04,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 12:34:04,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:34:04,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 47 conjunts are in the unsatisfiable core [2023-12-02 12:34:04,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:34:05,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 44 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:34:05,107 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:34:05,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 44 proven. 968 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2023-12-02 12:34:05,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:34:05,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866642081] [2023-12-02 12:34:05,834 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:34:05,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978956609] [2023-12-02 12:34:05,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978956609] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:34:05,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [942872332] [2023-12-02 12:34:05,836 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-12-02 12:34:05,836 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:34:05,836 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:34:05,836 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:34:05,836 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:34:06,212 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 78 for LOIs [2023-12-02 12:34:06,297 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:34:07,377 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5004#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (or (exists ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_88| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_112| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_89| Int) (|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_105| Int)) (and (not (= (+ (* 2 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_112| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_112| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_112|)) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_112| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_112| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_112| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_112|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_112| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_112|)) (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_89| 4))) (exists ((|v_ULTIMATE.start_main_#t~post5#1_109| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 0 (+ |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_88| 32768)) (<= 0 |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_89|) (<= |v_ULTIMATE.start_main_#t~post5#1_109| 49) (<= 1 ~counter~0) (<= 0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_112|) (<= |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_88| 32767) (<= 0 |v_ULTIMATE.start_main_#t~post5#1_109|) (<= 0 |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_105|))))) (exists ((|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_102| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_85| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_86| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_109| Int)) (and (not (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_109| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_85|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_109| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_109|))) (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_102|) (<= 1 ~counter~0) (<= 0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_109|) (<= 0 (+ |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_85| 32768)) (<= 0 |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_86|) (<= |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_85| 32767)))))' at error location [2023-12-02 12:34:07,377 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:34:07,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:34:07,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 50 [2023-12-02 12:34:07,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995531300] [2023-12-02 12:34:07,377 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:34:07,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-12-02 12:34:07,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:34:07,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-12-02 12:34:07,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1162, Invalid=2260, Unknown=0, NotChecked=0, Total=3422 [2023-12-02 12:34:07,382 INFO L87 Difference]: Start difference. First operand 184 states and 184 transitions. Second operand has 50 states, 50 states have (on average 4.2) internal successors, (210), 50 states have internal predecessors, (210), 45 states have call successors, (45), 24 states have call predecessors, (45), 23 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2023-12-02 12:34:08,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:34:08,999 INFO L93 Difference]: Finished difference Result 381 states and 404 transitions. [2023-12-02 12:34:08,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2023-12-02 12:34:09,000 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.2) internal successors, (210), 50 states have internal predecessors, (210), 45 states have call successors, (45), 24 states have call predecessors, (45), 23 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) Word has length 183 [2023-12-02 12:34:09,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:34:09,003 INFO L225 Difference]: With dead ends: 381 [2023-12-02 12:34:09,003 INFO L226 Difference]: Without dead ends: 376 [2023-12-02 12:34:09,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2095 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3345, Invalid=7367, Unknown=0, NotChecked=0, Total=10712 [2023-12-02 12:34:09,008 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 239 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:34:09,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 217 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:34:09,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2023-12-02 12:34:09,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 376. [2023-12-02 12:34:09,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 282 states have (on average 1.00354609929078) internal successors, (283), 282 states have internal predecessors, (283), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2023-12-02 12:34:09,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 376 transitions. [2023-12-02 12:34:09,081 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 376 transitions. Word has length 183 [2023-12-02 12:34:09,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:34:09,081 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 376 transitions. [2023-12-02 12:34:09,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.2) internal successors, (210), 50 states have internal predecessors, (210), 45 states have call successors, (45), 24 states have call predecessors, (45), 23 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2023-12-02 12:34:09,082 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 376 transitions. [2023-12-02 12:34:09,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2023-12-02 12:34:09,094 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:34:09,095 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1] [2023-12-02 12:34:09,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 12:34:09,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:34:09,295 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:34:09,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:34:09,296 INFO L85 PathProgramCache]: Analyzing trace with hash -890061447, now seen corresponding path program 5 times [2023-12-02 12:34:09,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:34:09,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143709404] [2023-12-02 12:34:09,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:34:09,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:34:09,314 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:34:09,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [368854020] [2023-12-02 12:34:09,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:34:09,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:34:09,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:34:09,315 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:34:09,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 12:34:43,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2023-12-02 12:34:43,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:34:43,219 INFO L262 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 95 conjunts are in the unsatisfiable core [2023-12-02 12:34:43,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:34:44,408 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 92 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:34:44,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:34:45,602 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 92 proven. 4232 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2023-12-02 12:34:45,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:34:45,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143709404] [2023-12-02 12:34:45,603 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:34:45,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368854020] [2023-12-02 12:34:45,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368854020] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:34:45,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1656791529] [2023-12-02 12:34:45,605 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-12-02 12:34:45,605 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:34:45,605 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:34:45,605 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:34:45,605 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:34:45,984 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 78 for LOIs [2023-12-02 12:34:46,074 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:34:47,633 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8442#(and (or (exists ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_98| Int) (|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_115| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_122| Int)) (and (not (= (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| 4) (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_122| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_122|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_122| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_122| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_122| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_122|) (* 2 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_122| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_122| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_122|))))) (exists ((|v_ULTIMATE.start_main_#t~post5#1_162| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (<= 0 |v_ULTIMATE.start_main_#t~post5#1_162|) (<= 0 |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_115|) (<= |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_98| 32767) (<= 0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_122|) (<= |v_ULTIMATE.start_main_#t~post5#1_162| 49) (<= 0 (+ |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_98| 32768)) (<= 0 |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99|))))) (exists ((|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_112| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_95| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_96| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_119| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 0 (+ |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_95| 32768)) (<= 0 |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_96|) (<= 0 |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_112|) (<= 1 ~counter~0) (<= 0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_119|) (not (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_119| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_119|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_119| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_95|))) (<= |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_95| 32767)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 12:34:47,633 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:34:47,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:34:47,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50] total 54 [2023-12-02 12:34:47,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558117606] [2023-12-02 12:34:47,633 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:34:47,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-12-02 12:34:47,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:34:47,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-12-02 12:34:47,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1360, Invalid=2546, Unknown=0, NotChecked=0, Total=3906 [2023-12-02 12:34:47,638 INFO L87 Difference]: Start difference. First operand 376 states and 376 transitions. Second operand has 54 states, 54 states have (on average 5.5) internal successors, (297), 54 states have internal predecessors, (297), 50 states have call successors, (93), 48 states have call predecessors, (93), 47 states have return successors, (92), 49 states have call predecessors, (92), 49 states have call successors, (92) [2023-12-02 12:34:49,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:34:49,397 INFO L93 Difference]: Finished difference Result 413 states and 416 transitions. [2023-12-02 12:34:49,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2023-12-02 12:34:49,398 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 5.5) internal successors, (297), 54 states have internal predecessors, (297), 50 states have call successors, (93), 48 states have call predecessors, (93), 47 states have return successors, (92), 49 states have call predecessors, (92), 49 states have call successors, (92) Word has length 375 [2023-12-02 12:34:49,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:34:49,401 INFO L225 Difference]: With dead ends: 413 [2023-12-02 12:34:49,401 INFO L226 Difference]: Without dead ends: 408 [2023-12-02 12:34:49,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1172 GetRequests, 1018 SyntacticMatches, 44 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3029 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3955, Invalid=8477, Unknown=0, NotChecked=0, Total=12432 [2023-12-02 12:34:49,406 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:34:49,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 237 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:34:49,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2023-12-02 12:34:49,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 408. [2023-12-02 12:34:49,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 306 states have (on average 1.0032679738562091) internal successors, (307), 306 states have internal predecessors, (307), 51 states have call successors, (51), 51 states have call predecessors, (51), 50 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2023-12-02 12:34:49,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 408 transitions. [2023-12-02 12:34:49,467 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 408 transitions. Word has length 375 [2023-12-02 12:34:49,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:34:49,467 INFO L495 AbstractCegarLoop]: Abstraction has 408 states and 408 transitions. [2023-12-02 12:34:49,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 5.5) internal successors, (297), 54 states have internal predecessors, (297), 50 states have call successors, (93), 48 states have call predecessors, (93), 47 states have return successors, (92), 49 states have call predecessors, (92), 49 states have call successors, (92) [2023-12-02 12:34:49,468 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 408 transitions. [2023-12-02 12:34:49,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2023-12-02 12:34:49,473 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:34:49,474 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 50, 50, 50, 50, 50, 50, 1, 1, 1, 1, 1] [2023-12-02 12:34:49,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 12:34:49,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:34:49,674 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:34:49,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:34:49,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1280322287, now seen corresponding path program 6 times [2023-12-02 12:34:49,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:34:49,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692865443] [2023-12-02 12:34:49,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:34:49,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:34:49,695 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:34:49,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [599212525] [2023-12-02 12:34:49,695 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 12:34:49,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:34:49,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:34:49,696 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:34:49,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 12:37:41,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 12:37:41,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2023-12-02 12:37:41,135 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 12:37:49,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 12:37:49,722 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 12:37:49,722 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 12:37:49,724 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-02 12:37:49,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 12:37:49,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 12:37:49,928 INFO L445 BasicCegarLoop]: Path program histogram: [6, 3, 1, 1, 1, 1] [2023-12-02 12:37:49,933 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 12:37:49,985 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:49,986 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:49,987 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:49,987 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:49,988 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:49,989 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:49,989 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:49,990 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:49,991 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:49,991 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:49,992 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:49,993 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:49,994 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:49,994 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:49,995 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:49,996 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:49,996 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:49,997 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:49,997 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:49,998 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:49,999 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,000 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,000 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,001 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,001 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,002 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,003 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,003 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,004 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,004 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,005 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,006 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,006 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,007 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,007 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,007 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,008 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,008 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,009 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,009 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,010 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,010 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,011 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,011 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,011 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,012 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,012 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,013 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,013 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,013 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,014 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,051 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 12:37:50 BoogieIcfgContainer [2023-12-02 12:37:50,051 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 12:37:50,052 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 12:37:50,052 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 12:37:50,052 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 12:37:50,052 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:31:32" (3/4) ... [2023-12-02 12:37:50,053 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-12-02 12:37:50,068 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,068 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,069 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,069 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,070 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,070 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,071 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,071 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,071 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,072 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,072 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,072 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,073 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,073 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,073 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,074 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,074 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,075 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,075 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,075 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,076 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,076 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,076 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,077 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,077 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,077 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,078 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,078 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,078 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,079 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,079 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,079 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,080 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,080 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,080 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,081 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,081 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,081 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,082 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,082 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,082 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,082 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,082 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,083 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,083 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,083 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,083 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,084 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,084 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,084 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,084 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 12:37:50,179 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/witness.graphml [2023-12-02 12:37:50,180 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 12:37:50,180 INFO L158 Benchmark]: Toolchain (without parser) took 377949.30ms. Allocated memory was 153.1MB in the beginning and 222.3MB in the end (delta: 69.2MB). Free memory was 114.0MB in the beginning and 96.9MB in the end (delta: 17.2MB). Peak memory consumption was 87.6MB. Max. memory is 16.1GB. [2023-12-02 12:37:50,180 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 109.1MB. Free memory is still 60.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 12:37:50,181 INFO L158 Benchmark]: CACSL2BoogieTranslator took 215.07ms. Allocated memory is still 153.1MB. Free memory was 113.7MB in the beginning and 103.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-12-02 12:37:50,181 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.04ms. Allocated memory is still 153.1MB. Free memory was 103.1MB in the beginning and 101.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 12:37:50,181 INFO L158 Benchmark]: Boogie Preprocessor took 16.91ms. Allocated memory is still 153.1MB. Free memory was 101.4MB in the beginning and 100.7MB in the end (delta: 786.2kB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 12:37:50,182 INFO L158 Benchmark]: RCFGBuilder took 261.87ms. Allocated memory is still 153.1MB. Free memory was 100.7MB in the beginning and 90.1MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-12-02 12:37:50,182 INFO L158 Benchmark]: TraceAbstraction took 377294.76ms. Allocated memory was 153.1MB in the beginning and 222.3MB in the end (delta: 69.2MB). Free memory was 89.3MB in the beginning and 111.6MB in the end (delta: -22.3MB). Peak memory consumption was 47.7MB. Max. memory is 16.1GB. [2023-12-02 12:37:50,183 INFO L158 Benchmark]: Witness Printer took 127.83ms. Allocated memory is still 222.3MB. Free memory was 111.6MB in the beginning and 96.9MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-12-02 12:37:50,185 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 109.1MB. Free memory is still 60.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 215.07ms. Allocated memory is still 153.1MB. Free memory was 113.7MB in the beginning and 103.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.04ms. Allocated memory is still 153.1MB. Free memory was 103.1MB in the beginning and 101.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 16.91ms. Allocated memory is still 153.1MB. Free memory was 101.4MB in the beginning and 100.7MB in the end (delta: 786.2kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 261.87ms. Allocated memory is still 153.1MB. Free memory was 100.7MB in the beginning and 90.1MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 377294.76ms. Allocated memory was 153.1MB in the beginning and 222.3MB in the end (delta: 69.2MB). Free memory was 89.3MB in the beginning and 111.6MB in the end (delta: -22.3MB). Peak memory consumption was 47.7MB. Max. memory is 16.1GB. * Witness Printer took 127.83ms. Allocated memory is still 222.3MB. Free memory was 111.6MB in the beginning and 96.9MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * 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 - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L23] y = 0 [L24] x = 0 [L25] c = 0 VAL [c=0, counter=0, k=51, x=0, y=0] [L27] EXPR counter++ VAL [c=0, counter=1, k=51, x=0, y=0] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=1] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=0, counter=1, k=51, x=0, y=0] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=1, counter=1, k=51, x=1, y=1] [L27] EXPR counter++ VAL [c=1, counter=2, k=51, x=1, y=1] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=2] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=1, counter=2, k=51, x=1, y=1] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=2, counter=2, k=51, x=9, y=2] [L27] EXPR counter++ VAL [c=2, counter=3, k=51, x=9, y=2] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=3] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=2, counter=3, k=51, x=9, y=2] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=3, counter=3, k=51, x=36, y=3] [L27] EXPR counter++ VAL [c=3, counter=4, k=51, x=36, y=3] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=4] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=3, counter=4, k=51, x=36, y=3] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=4, counter=4, k=51, x=100, y=4] [L27] EXPR counter++ VAL [c=4, counter=5, k=51, x=100, y=4] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=5] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=4, counter=5, k=51, x=100, y=4] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=5, counter=5, k=51, x=225, y=5] [L27] EXPR counter++ VAL [c=5, counter=6, k=51, x=225, y=5] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=6] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=5, counter=6, k=51, x=225, y=5] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=6, counter=6, k=51, x=441, y=6] [L27] EXPR counter++ VAL [c=6, counter=7, k=51, x=441, y=6] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=7] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=6, counter=7, k=51, x=441, y=6] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=7, counter=7, k=51, x=784, y=7] [L27] EXPR counter++ VAL [c=7, counter=8, k=51, x=784, y=7] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=8] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=7, counter=8, k=51, x=784, y=7] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=8, counter=8, k=51, x=1296, y=8] [L27] EXPR counter++ VAL [c=8, counter=9, k=51, x=1296, y=8] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=9] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=8, counter=9, k=51, x=1296, y=8] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=9, counter=9, k=51, x=2025, y=9] [L27] EXPR counter++ VAL [c=9, counter=10, k=51, x=2025, y=9] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=10] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=9, counter=10, k=51, x=2025, y=9] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=10, counter=10, k=51, x=3025, y=10] [L27] EXPR counter++ VAL [c=10, counter=11, k=51, x=3025, y=10] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=11] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=11] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=10, counter=11, k=51, x=3025, y=10] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=11, counter=11, k=51, x=4356, y=11] [L27] EXPR counter++ VAL [c=11, counter=12, k=51, x=4356, y=11] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=12] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=12] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=11, counter=12, k=51, x=4356, y=11] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=12, counter=12, k=51, x=6084, y=12] [L27] EXPR counter++ VAL [c=12, counter=13, k=51, x=6084, y=12] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=13] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=13] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=12, counter=13, k=51, x=6084, y=12] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=13, counter=13, k=51, x=8281, y=13] [L27] EXPR counter++ VAL [c=13, counter=14, k=51, x=8281, y=13] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=14] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=14] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=13, counter=14, k=51, x=8281, y=13] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=14, counter=14, k=51, x=11025, y=14] [L27] EXPR counter++ VAL [c=14, counter=15, k=51, x=11025, y=14] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=15] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=15] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=14, counter=15, k=51, x=11025, y=14] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=15, counter=15, k=51, x=14400, y=15] [L27] EXPR counter++ VAL [c=15, counter=16, k=51, x=14400, y=15] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=16] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=16] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=15, counter=16, k=51, x=14400, y=15] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=16, counter=16, k=51, x=18496, y=16] [L27] EXPR counter++ VAL [c=16, counter=17, k=51, x=18496, y=16] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=17] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=17] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=16, counter=17, k=51, x=18496, y=16] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=17, counter=17, k=51, x=23409, y=17] [L27] EXPR counter++ VAL [c=17, counter=18, k=51, x=23409, y=17] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=18] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=18] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=17, counter=18, k=51, x=23409, y=17] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=18, counter=18, k=51, x=29241, y=18] [L27] EXPR counter++ VAL [c=18, counter=19, k=51, x=29241, y=18] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=19] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=19] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=18, counter=19, k=51, x=29241, y=18] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=19, counter=19, k=51, x=36100, y=19] [L27] EXPR counter++ VAL [c=19, counter=20, k=51, x=36100, y=19] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=20] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=20] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=19, counter=20, k=51, x=36100, y=19] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=20, counter=20, k=51, x=44100, y=20] [L27] EXPR counter++ VAL [c=20, counter=21, k=51, x=44100, y=20] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=21] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=21] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=20, counter=21, k=51, x=44100, y=20] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=21, counter=21, k=51, x=53361, y=21] [L27] EXPR counter++ VAL [c=21, counter=22, k=51, x=53361, y=21] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=22] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=22] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=21, counter=22, k=51, x=53361, y=21] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=22, counter=22, k=51, x=64009, y=22] [L27] EXPR counter++ VAL [c=22, counter=23, k=51, x=64009, y=22] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=23] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=23] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=22, counter=23, k=51, x=64009, y=22] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=23, counter=23, k=51, x=76176, y=23] [L27] EXPR counter++ VAL [c=23, counter=24, k=51, x=76176, y=23] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=24] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=24] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=23, counter=24, k=51, x=76176, y=23] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=24, counter=24, k=51, x=90000, y=24] [L27] EXPR counter++ VAL [c=24, counter=25, k=51, x=90000, y=24] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=25] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=25] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=24, counter=25, k=51, x=90000, y=24] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=25, counter=25, k=51, x=105625, y=25] [L27] EXPR counter++ VAL [c=25, counter=26, k=51, x=105625, y=25] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=26] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=26] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=25, counter=26, k=51, x=105625, y=25] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=26, counter=26, k=51, x=123201, y=26] [L27] EXPR counter++ VAL [c=26, counter=27, k=51, x=123201, y=26] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=27] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=27] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=26, counter=27, k=51, x=123201, y=26] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=27, counter=27, k=51, x=142884, y=27] [L27] EXPR counter++ VAL [c=27, counter=28, k=51, x=142884, y=27] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=28] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=28] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=27, counter=28, k=51, x=142884, y=27] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=28, counter=28, k=51, x=164836, y=28] [L27] EXPR counter++ VAL [c=28, counter=29, k=51, x=164836, y=28] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=29] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=29] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=28, counter=29, k=51, x=164836, y=28] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=29, counter=29, k=51, x=189225, y=29] [L27] EXPR counter++ VAL [c=29, counter=30, k=51, x=189225, y=29] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=30] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=30] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=29, counter=30, k=51, x=189225, y=29] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=30, counter=30, k=51, x=216225, y=30] [L27] EXPR counter++ VAL [c=30, counter=31, k=51, x=216225, y=30] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=31] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=31] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=30, counter=31, k=51, x=216225, y=30] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=31, counter=31, k=51, x=246016, y=31] [L27] EXPR counter++ VAL [c=31, counter=32, k=51, x=246016, y=31] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=32] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=32] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=31, counter=32, k=51, x=246016, y=31] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=32, counter=32, k=51, x=278784, y=32] [L27] EXPR counter++ VAL [c=32, counter=33, k=51, x=278784, y=32] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=33] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=33] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=32, counter=33, k=51, x=278784, y=32] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=33, counter=33, k=51, x=314721, y=33] [L27] EXPR counter++ VAL [c=33, counter=34, k=51, x=314721, y=33] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=34] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=34] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=33, counter=34, k=51, x=314721, y=33] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=34, counter=34, k=51, x=354025, y=34] [L27] EXPR counter++ VAL [c=34, counter=35, k=51, x=354025, y=34] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=35] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=35] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=34, counter=35, k=51, x=354025, y=34] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=35, counter=35, k=51, x=396900, y=35] [L27] EXPR counter++ VAL [c=35, counter=36, k=51, x=396900, y=35] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=36] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=36] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=35, counter=36, k=51, x=396900, y=35] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=36, counter=36, k=51, x=443556, y=36] [L27] EXPR counter++ VAL [c=36, counter=37, k=51, x=443556, y=36] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=37] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=37] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=36, counter=37, k=51, x=443556, y=36] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=37, counter=37, k=51, x=494209, y=37] [L27] EXPR counter++ VAL [c=37, counter=38, k=51, x=494209, y=37] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=38] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=38] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=37, counter=38, k=51, x=494209, y=37] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=38, counter=38, k=51, x=549081, y=38] [L27] EXPR counter++ VAL [c=38, counter=39, k=51, x=549081, y=38] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=39] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=39] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=38, counter=39, k=51, x=549081, y=38] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=39, counter=39, k=51, x=608400, y=39] [L27] EXPR counter++ VAL [c=39, counter=40, k=51, x=608400, y=39] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=40] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=40] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=39, counter=40, k=51, x=608400, y=39] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=40, counter=40, k=51, x=672400, y=40] [L27] EXPR counter++ VAL [c=40, counter=41, k=51, x=672400, y=40] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=41] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=41] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=40, counter=41, k=51, x=672400, y=40] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=41, counter=41, k=51, x=741321, y=41] [L27] EXPR counter++ VAL [c=41, counter=42, k=51, x=741321, y=41] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=42] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=42] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=41, counter=42, k=51, x=741321, y=41] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=42, counter=42, k=51, x=815409, y=42] [L27] EXPR counter++ VAL [c=42, counter=43, k=51, x=815409, y=42] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=43] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=43] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=42, counter=43, k=51, x=815409, y=42] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=43, counter=43, k=51, x=894916, y=43] [L27] EXPR counter++ VAL [c=43, counter=44, k=51, x=894916, y=43] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=44] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=44] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=43, counter=44, k=51, x=894916, y=43] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=44, counter=44, k=51, x=980100, y=44] [L27] EXPR counter++ VAL [c=44, counter=45, k=51, x=980100, y=44] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=45] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=45] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=44, counter=45, k=51, x=980100, y=44] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=45, counter=45, k=51, x=1071225, y=45] [L27] EXPR counter++ VAL [c=45, counter=46, k=51, x=1071225, y=45] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=46] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=46] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=45, counter=46, k=51, x=1071225, y=45] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=46, counter=46, k=51, x=1168561, y=46] [L27] EXPR counter++ VAL [c=46, counter=47, k=51, x=1168561, y=46] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=47] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=47] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=46, counter=47, k=51, x=1168561, y=46] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=47, counter=47, k=51, x=1272384, y=47] [L27] EXPR counter++ VAL [c=47, counter=48, k=51, x=1272384, y=47] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=48] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=48] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=47, counter=48, k=51, x=1272384, y=47] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=48, counter=48, k=51, x=1382976, y=48] [L27] EXPR counter++ VAL [c=48, counter=49, k=51, x=1382976, y=48] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=49] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=49] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=48, counter=49, k=51, x=1382976, y=48] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=49, counter=49, k=51, x=1500625, y=49] [L27] EXPR counter++ VAL [c=49, counter=50, k=51, x=1500625, y=49] [L27] COND TRUE counter++<50 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=50] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=50] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=49, counter=50, k=51, x=1500625, y=49] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=50, counter=50, k=51, x=1625625, y=50] [L27] EXPR counter++ VAL [c=50, counter=51, k=51, x=1625625, y=50] [L27] COND FALSE !(counter++<50) [L37] CALL __VERIFIER_assert(k*y - (y*y) == 0) VAL [\old(cond)=0, counter=51] [L10] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=51] [L12] reach_error() VAL [\old(cond)=0, cond=0, counter=51] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 377.1s, OverallIterations: 13, TraceHistogramMax: 51, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 5.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 512 SdHoareTripleChecker+Valid, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 507 mSDsluCounter, 1460 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 310 IncrementalHoareTripleChecker+Unchecked, 1300 mSDsCounter, 107 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1125 IncrementalHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 107 mSolverCounterUnsat, 160 mSDtfsCounter, 1125 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2654 GetRequests, 2162 SyntacticMatches, 48 SemanticMatches, 444 ConstructedPredicates, 9 IntricatePredicates, 5 DeprecatedPredicates, 6703 ImplicationChecksByTransitivity, 40.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=408occurred in iteration=12, InterpolantAutomatonStates: 335, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 12 MinimizatonAttempts, 35 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 205.7s SatisfiabilityAnalysisTime, 137.9s InterpolantComputationTime, 1273 NumberOfCodeBlocks, 1273 NumberOfCodeBlocksAsserted, 72 NumberOfCheckSat, 1665 ConstructedInterpolants, 6 QuantifiedInterpolants, 5833 SizeOfPredicates, 104 NumberOfNonLiveVariables, 2540 ConjunctsInSsa, 311 ConjunctsInUnsatCore, 21 InterpolantComputations, 3 PerfectInterpolantSequences, 5828/22214 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: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-12-02 12:37:50,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a92f14cc-b99d-4952-ada4-96d0aa55cce4/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE