./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje --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 7f97a505fe6488215cf15708661c3a7c87a5132fbff317a4b6f7f9cc44d66008 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 04:48:39,025 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 04:48:39,091 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 04:48:39,096 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 04:48:39,096 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 04:48:39,129 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 04:48:39,130 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 04:48:39,131 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 04:48:39,132 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 04:48:39,133 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 04:48:39,134 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 04:48:39,134 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 04:48:39,135 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 04:48:39,136 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 04:48:39,136 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 04:48:39,136 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 04:48:39,137 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 04:48:39,137 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 04:48:39,138 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 04:48:39,138 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 04:48:39,139 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 04:48:39,143 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 04:48:39,143 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 04:48:39,144 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 04:48:39,144 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 04:48:39,145 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 04:48:39,145 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 04:48:39,145 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 04:48:39,146 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 04:48:39,146 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 04:48:39,146 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 04:48:39,147 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 04:48:39,147 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 04:48:39,148 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 04:48:39,148 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 04:48:39,148 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 04:48:39,149 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 04:48:39,149 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 04:48:39,149 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:48:39,150 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 04:48:39,150 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 04:48:39,150 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 04:48:39,151 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 04:48:39,151 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 04:48:39,152 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 04:48:39,152 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 04:48:39,152 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 04:48:39,152 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_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f97a505fe6488215cf15708661c3a7c87a5132fbff317a4b6f7f9cc44d66008 [2024-11-09 04:48:39,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 04:48:39,494 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 04:48:39,499 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 04:48:39,502 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 04:48:39,503 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 04:48:39,504 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound5.c Unable to find full path for "g++" [2024-11-09 04:48:41,584 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 04:48:41,809 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 04:48:41,810 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound5.c [2024-11-09 04:48:41,819 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/data/f0a05a58f/6f5134a2cd684ab6a111ecb34c3c37e8/FLAG3254b8589 [2024-11-09 04:48:42,148 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/data/f0a05a58f/6f5134a2cd684ab6a111ecb34c3c37e8 [2024-11-09 04:48:42,151 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 04:48:42,153 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 04:48:42,154 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 04:48:42,155 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 04:48:42,162 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 04:48:42,163 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:48:42" (1/1) ... [2024-11-09 04:48:42,164 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79fc41ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:48:42, skipping insertion in model container [2024-11-09 04:48:42,164 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:48:42" (1/1) ... [2024-11-09 04:48:42,191 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 04:48:42,394 WARN L250 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_5b7b27ed-6c18-4fe7-82f6-f488b170a315/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound5.c[535,548] [2024-11-09 04:48:42,435 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:48:42,449 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 04:48:42,467 WARN L250 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_5b7b27ed-6c18-4fe7-82f6-f488b170a315/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound5.c[535,548] [2024-11-09 04:48:42,489 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:48:42,513 INFO L204 MainTranslator]: Completed translation [2024-11-09 04:48:42,514 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:48:42 WrapperNode [2024-11-09 04:48:42,514 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 04:48:42,515 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 04:48:42,516 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 04:48:42,517 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 04:48:42,525 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:48:42" (1/1) ... [2024-11-09 04:48:42,533 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:48:42" (1/1) ... [2024-11-09 04:48:42,555 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 65 [2024-11-09 04:48:42,557 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 04:48:42,558 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 04:48:42,558 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 04:48:42,559 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 04:48:42,568 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:48:42" (1/1) ... [2024-11-09 04:48:42,568 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:48:42" (1/1) ... [2024-11-09 04:48:42,570 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:48:42" (1/1) ... [2024-11-09 04:48:42,570 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:48:42" (1/1) ... [2024-11-09 04:48:42,577 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:48:42" (1/1) ... [2024-11-09 04:48:42,585 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:48:42" (1/1) ... [2024-11-09 04:48:42,589 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:48:42" (1/1) ... [2024-11-09 04:48:42,590 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:48:42" (1/1) ... [2024-11-09 04:48:42,592 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 04:48:42,597 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 04:48:42,597 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 04:48:42,597 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 04:48:42,598 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:48:42" (1/1) ... [2024-11-09 04:48:42,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:48:42,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:48:42,645 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 04:48:42,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 04:48:42,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 04:48:42,688 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-09 04:48:42,689 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-09 04:48:42,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 04:48:42,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 04:48:42,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 04:48:42,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-09 04:48:42,689 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-09 04:48:42,793 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 04:48:42,796 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 04:48:42,998 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-11-09 04:48:42,998 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 04:48:43,035 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 04:48:43,038 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-09 04:48:43,039 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:48:43 BoogieIcfgContainer [2024-11-09 04:48:43,040 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 04:48:43,044 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 04:48:43,045 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 04:48:43,049 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 04:48:43,050 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 04:48:42" (1/3) ... [2024-11-09 04:48:43,051 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5612e13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:48:43, skipping insertion in model container [2024-11-09 04:48:43,052 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:48:42" (2/3) ... [2024-11-09 04:48:43,054 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5612e13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:48:43, skipping insertion in model container [2024-11-09 04:48:43,054 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:48:43" (3/3) ... [2024-11-09 04:48:43,056 INFO L112 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound5.c [2024-11-09 04:48:43,076 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 04:48:43,077 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 04:48:43,153 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 04:48:43,161 INFO L333 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, 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;@79ffccc3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 04:48:43,161 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 04:48:43,165 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 04:48:43,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 04:48:43,171 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:48:43,172 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:48:43,173 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:48:43,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:48:43,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1025185628, now seen corresponding path program 1 times [2024-11-09 04:48:43,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:48:43,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218979639] [2024-11-09 04:48:43,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:48:43,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:48:43,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:48:43,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 04:48:43,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:48:43,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218979639] [2024-11-09 04:48:43,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218979639] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:48:43,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:48:43,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 04:48:43,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889802862] [2024-11-09 04:48:43,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:48:43,359 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-09 04:48:43,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:48:43,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-09 04:48:43,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 04:48:43,383 INFO L87 Difference]: Start difference. First operand has 27 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:48:43,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:48:43,419 INFO L93 Difference]: Finished difference Result 48 states and 77 transitions. [2024-11-09 04:48:43,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-09 04:48:43,421 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2024-11-09 04:48:43,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:48:43,428 INFO L225 Difference]: With dead ends: 48 [2024-11-09 04:48:43,428 INFO L226 Difference]: Without dead ends: 25 [2024-11-09 04:48:43,430 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 04:48:43,434 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:48:43,435 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 04:48:43,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-09 04:48:43,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-09 04:48:43,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-09 04:48:43,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2024-11-09 04:48:43,470 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 13 [2024-11-09 04:48:43,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:48:43,472 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2024-11-09 04:48:43,472 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:48:43,473 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2024-11-09 04:48:43,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-09 04:48:43,474 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:48:43,474 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:48:43,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 04:48:43,475 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:48:43,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:48:43,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1130602194, now seen corresponding path program 1 times [2024-11-09 04:48:43,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:48:43,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597841853] [2024-11-09 04:48:43,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:48:43,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:48:43,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:48:43,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 04:48:43,716 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:48:43,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597841853] [2024-11-09 04:48:43,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597841853] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:48:43,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:48:43,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 04:48:43,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518213314] [2024-11-09 04:48:43,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:48:43,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:48:43,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:48:43,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:48:43,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:48:43,726 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:48:43,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:48:43,786 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2024-11-09 04:48:43,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:48:43,793 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2024-11-09 04:48:43,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:48:43,794 INFO L225 Difference]: With dead ends: 34 [2024-11-09 04:48:43,794 INFO L226 Difference]: Without dead ends: 27 [2024-11-09 04:48:43,795 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:48:43,799 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 3 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:48:43,800 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 82 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 04:48:43,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-09 04:48:43,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-09 04:48:43,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-09 04:48:43,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2024-11-09 04:48:43,811 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 14 [2024-11-09 04:48:43,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:48:43,812 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2024-11-09 04:48:43,812 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:48:43,812 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2024-11-09 04:48:43,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-09 04:48:43,813 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:48:43,813 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:48:43,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 04:48:43,814 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:48:43,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:48:43,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1132270490, now seen corresponding path program 1 times [2024-11-09 04:48:43,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:48:43,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755562583] [2024-11-09 04:48:43,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:48:43,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:48:43,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 04:48:43,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1655930690] [2024-11-09 04:48:43,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:48:43,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:48:43,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:48:43,877 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:48:43,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 04:48:43,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:48:43,948 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 04:48:43,955 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:48:44,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 04:48:44,316 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:48:44,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:48:44,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755562583] [2024-11-09 04:48:44,318 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 04:48:44,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655930690] [2024-11-09 04:48:44,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655930690] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:48:44,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:48:44,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 04:48:44,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350012511] [2024-11-09 04:48:44,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:48:44,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 04:48:44,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:48:44,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 04:48:44,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:48:44,322 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:48:46,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:48:46,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:48:46,458 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2024-11-09 04:48:46,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 04:48:46,459 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2024-11-09 04:48:46,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:48:46,460 INFO L225 Difference]: With dead ends: 46 [2024-11-09 04:48:46,461 INFO L226 Difference]: Without dead ends: 44 [2024-11-09 04:48:46,461 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:48:46,462 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:48:46,463 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 85 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-09 04:48:46,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-09 04:48:46,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2024-11-09 04:48:46,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 31 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-09 04:48:46,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 60 transitions. [2024-11-09 04:48:46,494 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 60 transitions. Word has length 14 [2024-11-09 04:48:46,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:48:46,494 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 60 transitions. [2024-11-09 04:48:46,495 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:48:46,495 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 60 transitions. [2024-11-09 04:48:46,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-09 04:48:46,496 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:48:46,500 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:48:46,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 04:48:46,701 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:48:46,702 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:48:46,702 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:48:46,702 INFO L85 PathProgramCache]: Analyzing trace with hash -2116354911, now seen corresponding path program 1 times [2024-11-09 04:48:46,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:48:46,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328333678] [2024-11-09 04:48:46,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:48:46,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:48:46,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:48:46,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 04:48:46,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:48:46,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328333678] [2024-11-09 04:48:46,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328333678] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:48:46,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905137707] [2024-11-09 04:48:46,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:48:46,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:48:46,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:48:47,000 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:48:47,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 04:48:47,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:48:47,074 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 04:48:47,077 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:48:47,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 04:48:47,185 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:48:47,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 04:48:47,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905137707] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:48:47,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1977032822] [2024-11-09 04:48:47,432 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 04:48:47,432 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:48:47,437 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:48:47,443 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:48:47,444 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:48:48,360 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 103 for LOIs [2024-11-09 04:48:52,536 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 92 for LOIs [2024-11-09 04:48:52,582 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:49:01,910 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (= c_~counter~0 1)) (.cse1 (<= 1 |c_#StackHeapBarrier|)) (.cse2 (= |c___VERIFIER_assert_#in~cond| 1))) (and (or (and .cse0 .cse1) (and .cse0 .cse1 .cse2)) (let ((.cse17 (select |c_#memory_int| 1))) (let ((.cse3 (= (select |c_#valid| 0) 0)) (.cse4 (= (select |c_#valid| 3) 1)) (.cse5 (= 2 (select |c_#length| 1))) (.cse6 (= (select |c_#valid| 1) 1)) (.cse7 (= (select |c_#valid| 2) 1)) (.cse8 (= (select .cse17 1) 0)) (.cse12 (= (select |c_#length| 3) 12)) (.cse13 (= 48 (select .cse17 0))) (.cse14 (= (select |c_#length| 2) 13))) (or (and .cse3 .cse4 .cse0 .cse5 .cse6 .cse1 .cse7 .cse8 (exists ((|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_7| Int)) (let ((.cse11 (div (+ (* (- 1) |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_7|) 1) 2))) (let ((.cse9 (* .cse11 .cse11))) (and (= (mod (+ |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_5| .cse9) 2) 1) (let ((.cse10 (= (+ (* |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_7| |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_7|) 1) (+ (* 2 |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_7|) (* .cse9 4))))) (or (and (not .cse10) (= |c___VERIFIER_assert_#in~cond| 0)) (and .cse10 .cse2))) (<= |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_5| .cse9) (<= 0 (+ 2147483647 .cse11)) (<= .cse11 2147483648) (= (mod (+ |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_7| 1) 2) 0) (<= .cse9 (+ 2147483647 |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_5|)) (<= (+ |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_5| 3) |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_7|))))) .cse12 .cse13 .cse14) (and .cse3 .cse4 .cse0 .cse5 (exists ((|v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_6| Int)) (let ((.cse16 (div (+ (* (- 1) |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_6|) 1) 2))) (let ((.cse15 (* .cse16 .cse16))) (and (= (mod (+ |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_6| 1) 2) 0) (= (+ (* |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_6| |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_6|) 1) (+ (* 2 |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_6|) (* 4 .cse15))) (= (mod .cse15 2) 1) (<= .cse15 2147483647) (<= 3 |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_6|) (<= .cse16 2147483648) (<= 0 .cse15) (<= 0 (+ .cse16 2147483647)))))) .cse6 .cse1 .cse7 .cse8 .cse12 .cse13 .cse2 .cse14)))))) is different from false [2024-11-09 04:49:14,715 WARN L286 SmtUtils]: Spent 6.04s on a formula simplification. DAG size of input: 105 DAG size of output: 75 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:49:30,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1977032822] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:49:30,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:49:30,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [7, 8, 8] total 24 [2024-11-09 04:49:30,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871531988] [2024-11-09 04:49:30,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:49:30,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 04:49:30,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:49:30,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 04:49:30,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=428, Unknown=5, NotChecked=42, Total=552 [2024-11-09 04:49:30,933 INFO L87 Difference]: Start difference. First operand 43 states and 60 transitions. Second operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 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) [2024-11-09 04:49:32,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-09 04:49:34,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-09 04:49:36,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-09 04:49:38,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-09 04:49:40,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-09 04:49:42,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-09 04:49:42,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:49:42,677 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2024-11-09 04:49:42,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 04:49:42,679 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 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) Word has length 20 [2024-11-09 04:49:42,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:49:42,680 INFO L225 Difference]: With dead ends: 57 [2024-11-09 04:49:42,682 INFO L226 Difference]: Without dead ends: 50 [2024-11-09 04:49:42,682 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 38.5s TimeCoverageRelationStatistics Valid=77, Invalid=428, Unknown=5, NotChecked=42, Total=552 [2024-11-09 04:49:42,686 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 1 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 1 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2024-11-09 04:49:42,687 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 165 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 157 Invalid, 5 Unknown, 36 Unchecked, 11.7s Time] [2024-11-09 04:49:42,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-09 04:49:42,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2024-11-09 04:49:42,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 35 states have internal predecessors, (47), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-09 04:49:42,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 66 transitions. [2024-11-09 04:49:42,703 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 66 transitions. Word has length 20 [2024-11-09 04:49:42,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:49:42,704 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 66 transitions. [2024-11-09 04:49:42,704 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 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) [2024-11-09 04:49:42,705 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 66 transitions. [2024-11-09 04:49:42,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-09 04:49:42,706 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:49:42,706 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:49:42,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 04:49:42,909 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:49:42,910 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:49:42,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:49:42,910 INFO L85 PathProgramCache]: Analyzing trace with hash -771087956, now seen corresponding path program 1 times [2024-11-09 04:49:42,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:49:42,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248907038] [2024-11-09 04:49:42,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:49:42,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:49:42,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:49:43,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 04:49:43,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:49:43,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248907038] [2024-11-09 04:49:43,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248907038] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:49:43,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:49:43,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 04:49:43,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42342527] [2024-11-09 04:49:43,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:49:43,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 04:49:43,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:49:43,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 04:49:43,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:49:43,098 INFO L87 Difference]: Start difference. First operand 49 states and 66 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 04:49:43,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:49:43,189 INFO L93 Difference]: Finished difference Result 86 states and 120 transitions. [2024-11-09 04:49:43,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:49:43,190 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2024-11-09 04:49:43,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:49:43,191 INFO L225 Difference]: With dead ends: 86 [2024-11-09 04:49:43,191 INFO L226 Difference]: Without dead ends: 51 [2024-11-09 04:49:43,192 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:49:43,193 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 7 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:49:43,193 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 118 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:49:43,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-09 04:49:43,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-11-09 04:49:43,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 37 states have internal predecessors, (49), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-09 04:49:43,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2024-11-09 04:49:43,221 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 26 [2024-11-09 04:49:43,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:49:43,221 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2024-11-09 04:49:43,223 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 04:49:43,223 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2024-11-09 04:49:43,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-09 04:49:43,224 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:49:43,225 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:49:43,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 04:49:43,225 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:49:43,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:49:43,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1133160267, now seen corresponding path program 1 times [2024-11-09 04:49:43,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:49:43,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153627527] [2024-11-09 04:49:43,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:49:43,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:49:43,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 04:49:43,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1174686755] [2024-11-09 04:49:43,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:49:43,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:49:43,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:49:43,271 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:49:43,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 04:49:43,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:49:43,331 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 04:49:43,333 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:49:43,672 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 04:49:43,673 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:49:43,909 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 04:49:43,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:49:43,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153627527] [2024-11-09 04:49:43,910 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 04:49:43,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174686755] [2024-11-09 04:49:43,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174686755] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:49:43,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [438462126] [2024-11-09 04:49:43,913 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 04:49:43,913 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:49:43,913 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:49:43,914 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:49:43,914 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:49:45,362 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 100 for LOIs [2024-11-09 04:49:45,551 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 96 for LOIs [2024-11-09 04:49:45,583 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:50:02,815 WARN L286 SmtUtils]: Spent 6.40s on a formula simplification. DAG size of input: 100 DAG size of output: 85 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:50:19,324 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1113#(and (<= 2 ~counter~0) (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_18| Int) (|v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_20| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_22| Int) (|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_30| Int)) (and (not (= (+ (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_22| 2) (* |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_20| |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_20|)) (+ (* |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_18| 4) (* |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_30| 4) (* 2 |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_20|) (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_22| |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_22|)))) (<= 1 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_22|) (<= |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_30| 2147483647) (<= 0 |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_30|))) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 04:50:19,324 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:50:19,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 04:50:19,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 11 [2024-11-09 04:50:19,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758769894] [2024-11-09 04:50:19,325 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 04:50:19,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 04:50:19,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:50:19,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 04:50:19,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=616, Unknown=4, NotChecked=0, Total=702 [2024-11-09 04:50:19,327 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-09 04:50:19,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:50:19,853 INFO L93 Difference]: Finished difference Result 73 states and 98 transitions. [2024-11-09 04:50:19,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 04:50:19,854 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 30 [2024-11-09 04:50:19,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:50:19,855 INFO L225 Difference]: With dead ends: 73 [2024-11-09 04:50:19,855 INFO L226 Difference]: Without dead ends: 69 [2024-11-09 04:50:19,856 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 34.1s TimeCoverageRelationStatistics Valid=89, Invalid=663, Unknown=4, NotChecked=0, Total=756 [2024-11-09 04:50:19,856 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 44 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 04:50:19,857 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 153 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 04:50:19,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-09 04:50:19,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 37. [2024-11-09 04:50:19,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 04:50:19,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2024-11-09 04:50:19,874 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 30 [2024-11-09 04:50:19,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:50:19,874 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2024-11-09 04:50:19,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-09 04:50:19,875 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2024-11-09 04:50:19,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-09 04:50:19,875 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:50:19,875 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:50:19,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 04:50:20,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:50:20,076 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:50:20,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:50:20,077 INFO L85 PathProgramCache]: Analyzing trace with hash -694319226, now seen corresponding path program 1 times [2024-11-09 04:50:20,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:50:20,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4815049] [2024-11-09 04:50:20,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:50:20,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:50:20,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:50:20,204 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 04:50:20,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:50:20,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4815049] [2024-11-09 04:50:20,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4815049] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:50:20,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:50:20,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-09 04:50:20,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470568378] [2024-11-09 04:50:20,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:50:20,206 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 04:50:20,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:50:20,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 04:50:20,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:50:20,207 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 04:50:20,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:50:20,273 INFO L93 Difference]: Finished difference Result 67 states and 84 transitions. [2024-11-09 04:50:20,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 04:50:20,274 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2024-11-09 04:50:20,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:50:20,275 INFO L225 Difference]: With dead ends: 67 [2024-11-09 04:50:20,275 INFO L226 Difference]: Without dead ends: 46 [2024-11-09 04:50:20,275 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:50:20,276 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 13 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:50:20,277 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 106 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 04:50:20,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-09 04:50:20,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2024-11-09 04:50:20,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-09 04:50:20,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2024-11-09 04:50:20,296 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 32 [2024-11-09 04:50:20,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:50:20,296 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2024-11-09 04:50:20,297 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 04:50:20,297 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2024-11-09 04:50:20,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-09 04:50:20,298 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:50:20,298 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:50:20,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 04:50:20,298 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:50:20,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:50:20,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1006119861, now seen corresponding path program 1 times [2024-11-09 04:50:20,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:50:20,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120399218] [2024-11-09 04:50:20,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:50:20,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:50:20,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:50:20,422 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 04:50:20,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:50:20,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120399218] [2024-11-09 04:50:20,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120399218] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:50:20,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446969931] [2024-11-09 04:50:20,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:50:20,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:50:20,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:50:20,427 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:50:20,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 04:50:20,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:50:20,495 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 04:50:20,497 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:50:20,568 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 04:50:20,568 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:50:20,650 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 04:50:20,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446969931] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:50:20,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [167798261] [2024-11-09 04:50:20,653 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-09 04:50:20,653 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:50:20,653 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:50:20,653 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:50:20,654 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:50:22,037 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2024-11-09 04:50:22,043 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 92 for LOIs [2024-11-09 04:50:22,067 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:50:40,986 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1683#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 04:50:40,986 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:50:40,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:50:40,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 11 [2024-11-09 04:50:40,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443155072] [2024-11-09 04:50:40,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:50:40,987 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 04:50:40,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:50:40,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 04:50:40,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=774, Unknown=2, NotChecked=0, Total=930 [2024-11-09 04:50:40,989 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 7 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-09 04:50:41,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:50:41,174 INFO L93 Difference]: Finished difference Result 101 states and 129 transitions. [2024-11-09 04:50:41,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 04:50:41,175 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 7 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 34 [2024-11-09 04:50:41,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:50:41,176 INFO L225 Difference]: With dead ends: 101 [2024-11-09 04:50:41,176 INFO L226 Difference]: Without dead ends: 80 [2024-11-09 04:50:41,177 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=174, Invalid=946, Unknown=2, NotChecked=0, Total=1122 [2024-11-09 04:50:41,178 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 45 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:50:41,178 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 167 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:50:41,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-09 04:50:41,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2024-11-09 04:50:41,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 52 states have (on average 1.25) internal successors, (65), 53 states have internal predecessors, (65), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-09 04:50:41,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2024-11-09 04:50:41,210 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 34 [2024-11-09 04:50:41,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:50:41,210 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2024-11-09 04:50:41,210 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 7 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-09 04:50:41,211 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2024-11-09 04:50:41,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-09 04:50:41,212 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:50:41,212 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:50:41,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 04:50:41,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-09 04:50:41,416 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:50:41,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:50:41,416 INFO L85 PathProgramCache]: Analyzing trace with hash -990667283, now seen corresponding path program 1 times [2024-11-09 04:50:41,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:50:41,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494802933] [2024-11-09 04:50:41,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:50:41,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:50:41,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:50:41,520 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-09 04:50:41,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:50:41,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494802933] [2024-11-09 04:50:41,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494802933] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:50:41,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:50:41,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 04:50:41,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525030526] [2024-11-09 04:50:41,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:50:41,522 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:50:41,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:50:41,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:50:41,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:50:41,524 INFO L87 Difference]: Start difference. First operand 72 states and 90 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-09 04:50:41,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:50:41,627 INFO L93 Difference]: Finished difference Result 125 states and 167 transitions. [2024-11-09 04:50:41,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:50:41,628 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2024-11-09 04:50:41,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:50:41,631 INFO L225 Difference]: With dead ends: 125 [2024-11-09 04:50:41,635 INFO L226 Difference]: Without dead ends: 94 [2024-11-09 04:50:41,636 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:50:41,637 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 16 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:50:41,637 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 113 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:50:41,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-09 04:50:41,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2024-11-09 04:50:41,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 68 states have internal predecessors, (85), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-09 04:50:41,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 120 transitions. [2024-11-09 04:50:41,689 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 120 transitions. Word has length 38 [2024-11-09 04:50:41,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:50:41,690 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 120 transitions. [2024-11-09 04:50:41,692 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-09 04:50:41,692 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 120 transitions. [2024-11-09 04:50:41,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-09 04:50:41,693 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:50:41,693 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:50:41,695 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 04:50:41,695 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:50:41,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:50:41,696 INFO L85 PathProgramCache]: Analyzing trace with hash -2057484398, now seen corresponding path program 1 times [2024-11-09 04:50:41,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:50:41,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230003247] [2024-11-09 04:50:41,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:50:41,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:50:41,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:50:41,890 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-09 04:50:41,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:50:41,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230003247] [2024-11-09 04:50:41,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230003247] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:50:41,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387478388] [2024-11-09 04:50:41,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:50:41,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:50:41,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:50:41,893 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:50:41,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 04:50:41,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:50:41,958 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 04:50:41,959 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:50:42,048 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 04:50:42,049 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:50:42,163 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-09 04:50:42,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387478388] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:50:42,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [381544956] [2024-11-09 04:50:42,166 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-09 04:50:42,166 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:50:42,166 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:50:42,167 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:50:42,167 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:50:44,533 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 78 for LOIs [2024-11-09 04:50:44,630 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 96 for LOIs [2024-11-09 04:50:44,650 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:51:05,103 WARN L286 SmtUtils]: Spent 5.58s on a formula simplification. DAG size of input: 80 DAG size of output: 75 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:51:28,461 WARN L286 SmtUtils]: Spent 22.42s on a formula simplification. DAG size of input: 83 DAG size of output: 78 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:51:33,276 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2547#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 04:51:33,276 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:51:33,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:51:33,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 11 [2024-11-09 04:51:33,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532189429] [2024-11-09 04:51:33,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:51:33,277 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 04:51:33,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:51:33,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 04:51:33,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=771, Unknown=1, NotChecked=0, Total=930 [2024-11-09 04:51:33,278 INFO L87 Difference]: Start difference. First operand 92 states and 120 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 7 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2024-11-09 04:51:33,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:51:33,461 INFO L93 Difference]: Finished difference Result 141 states and 192 transitions. [2024-11-09 04:51:33,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 04:51:33,461 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 7 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 40 [2024-11-09 04:51:33,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:51:33,463 INFO L225 Difference]: With dead ends: 141 [2024-11-09 04:51:33,463 INFO L226 Difference]: Without dead ends: 96 [2024-11-09 04:51:33,463 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 90 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 48.8s TimeCoverageRelationStatistics Valid=170, Invalid=885, Unknown=1, NotChecked=0, Total=1056 [2024-11-09 04:51:33,464 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 16 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:51:33,464 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 168 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:51:33,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-09 04:51:33,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2024-11-09 04:51:33,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 70 states have internal predecessors, (88), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-09 04:51:33,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 123 transitions. [2024-11-09 04:51:33,502 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 123 transitions. Word has length 40 [2024-11-09 04:51:33,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:51:33,503 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 123 transitions. [2024-11-09 04:51:33,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 7 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2024-11-09 04:51:33,503 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 123 transitions. [2024-11-09 04:51:33,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-09 04:51:33,504 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:51:33,504 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:51:33,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 04:51:33,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 04:51:33,706 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:51:33,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:51:33,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1336812793, now seen corresponding path program 1 times [2024-11-09 04:51:33,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:51:33,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418552530] [2024-11-09 04:51:33,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:51:33,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:51:33,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:51:33,860 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-09 04:51:33,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:51:33,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418552530] [2024-11-09 04:51:33,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418552530] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:51:33,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799115425] [2024-11-09 04:51:33,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:51:33,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:51:33,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:51:33,862 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:51:33,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 04:51:33,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:51:33,914 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 04:51:33,916 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:51:34,021 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 04:51:34,021 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:51:34,128 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-09 04:51:34,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799115425] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:51:34,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [954283110] [2024-11-09 04:51:34,131 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-09 04:51:34,131 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:51:34,131 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:51:34,131 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:51:34,131 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:51:36,590 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2024-11-09 04:51:36,597 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 92 for LOIs [2024-11-09 04:51:36,651 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:52:13,769 WARN L286 SmtUtils]: Spent 11.37s on a formula simplification. DAG size of input: 81 DAG size of output: 71 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:52:26,734 WARN L286 SmtUtils]: Spent 11.95s on a formula simplification. DAG size of input: 84 DAG size of output: 74 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:52:28,816 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3206#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 04:52:28,816 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:52:28,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:52:28,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 10 [2024-11-09 04:52:28,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305178924] [2024-11-09 04:52:28,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:52:28,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 04:52:28,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:52:28,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 04:52:28,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=784, Unknown=2, NotChecked=0, Total=930 [2024-11-09 04:52:28,818 INFO L87 Difference]: Start difference. First operand 95 states and 123 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 7 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2024-11-09 04:52:28,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:52:28,934 INFO L93 Difference]: Finished difference Result 102 states and 130 transitions. [2024-11-09 04:52:28,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 04:52:28,935 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 7 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 46 [2024-11-09 04:52:28,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:52:28,936 INFO L225 Difference]: With dead ends: 102 [2024-11-09 04:52:28,936 INFO L226 Difference]: Without dead ends: 97 [2024-11-09 04:52:28,937 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 109 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 52.2s TimeCoverageRelationStatistics Valid=144, Invalid=784, Unknown=2, NotChecked=0, Total=930 [2024-11-09 04:52:28,938 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 20 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:52:28,938 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 127 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:52:28,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-09 04:52:28,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2024-11-09 04:52:28,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 72 states have (on average 1.25) internal successors, (90), 72 states have internal predecessors, (90), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-09 04:52:28,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 125 transitions. [2024-11-09 04:52:28,979 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 125 transitions. Word has length 46 [2024-11-09 04:52:28,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:52:28,979 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 125 transitions. [2024-11-09 04:52:28,979 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 7 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2024-11-09 04:52:28,980 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 125 transitions. [2024-11-09 04:52:28,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-09 04:52:28,984 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:52:28,985 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:52:29,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 04:52:29,188 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-09 04:52:29,189 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:52:29,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:52:29,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1086065032, now seen corresponding path program 1 times [2024-11-09 04:52:29,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:52:29,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027741139] [2024-11-09 04:52:29,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:52:29,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:52:29,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:52:29,461 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-09 04:52:29,461 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:52:29,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027741139] [2024-11-09 04:52:29,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027741139] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:52:29,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728880394] [2024-11-09 04:52:29,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:52:29,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:52:29,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:52:29,463 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:52:29,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 04:52:29,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:52:29,512 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 04:52:29,514 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:52:29,638 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-09 04:52:29,638 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:52:29,813 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-09 04:52:29,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728880394] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:52:29,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1314395927] [2024-11-09 04:52:29,815 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-09 04:52:29,815 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:52:29,816 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:52:29,816 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:52:29,816 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:52:33,140 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2024-11-09 04:52:33,145 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 92 for LOIs [2024-11-09 04:52:33,163 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:52:48,016 WARN L286 SmtUtils]: Spent 6.51s on a formula simplification. DAG size of input: 76 DAG size of output: 72 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:53:08,539 WARN L286 SmtUtils]: Spent 5.01s on a formula simplification. DAG size of input: 78 DAG size of output: 70 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:53:14,134 WARN L286 SmtUtils]: Spent 5.44s on a formula simplification. DAG size of input: 81 DAG size of output: 74 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:53:23,119 WARN L286 SmtUtils]: Spent 5.66s on a formula simplification. DAG size of input: 80 DAG size of output: 75 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:53:32,913 WARN L286 SmtUtils]: Spent 9.45s on a formula simplification. DAG size of input: 83 DAG size of output: 75 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:53:40,029 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3847#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 04:53:40,029 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:53:40,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:53:40,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 15 [2024-11-09 04:53:40,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967165042] [2024-11-09 04:53:40,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:53:40,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 04:53:40,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:53:40,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 04:53:40,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1042, Unknown=4, NotChecked=0, Total=1190 [2024-11-09 04:53:40,031 INFO L87 Difference]: Start difference. First operand 97 states and 125 transitions. Second operand has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 11 states have internal predecessors, (37), 5 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (11), 7 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-09 04:53:40,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:53:40,530 INFO L93 Difference]: Finished difference Result 171 states and 235 transitions. [2024-11-09 04:53:40,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 04:53:40,531 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 11 states have internal predecessors, (37), 5 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (11), 7 states have call predecessors, (11), 4 states have call successors, (11) Word has length 52 [2024-11-09 04:53:40,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:53:40,532 INFO L225 Difference]: With dead ends: 171 [2024-11-09 04:53:40,532 INFO L226 Difference]: Without dead ends: 114 [2024-11-09 04:53:40,533 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 127 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 67.1s TimeCoverageRelationStatistics Valid=161, Invalid=1167, Unknown=4, NotChecked=0, Total=1332 [2024-11-09 04:53:40,534 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 53 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:53:40,534 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 266 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 04:53:40,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-09 04:53:40,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 101. [2024-11-09 04:53:40,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.2266666666666666) internal successors, (92), 75 states have internal predecessors, (92), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-11-09 04:53:40,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 129 transitions. [2024-11-09 04:53:40,569 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 129 transitions. Word has length 52 [2024-11-09 04:53:40,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:53:40,570 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 129 transitions. [2024-11-09 04:53:40,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 11 states have internal predecessors, (37), 5 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (11), 7 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-09 04:53:40,570 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 129 transitions. [2024-11-09 04:53:40,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-09 04:53:40,571 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:53:40,572 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:53:40,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 04:53:40,772 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 04:53:40,772 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:53:40,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:53:40,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1977163771, now seen corresponding path program 2 times [2024-11-09 04:53:40,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:53:40,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322642703] [2024-11-09 04:53:40,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:53:40,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:53:40,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 04:53:40,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [145467039] [2024-11-09 04:53:40,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:53:40,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:53:40,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:53:40,812 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:53:40,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 04:53:40,884 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-09 04:53:40,885 INFO L228 tOrderPrioritization]: Conjunction of SSA is sat [2024-11-09 04:53:40,885 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-09 04:53:40,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 04:53:40,929 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2024-11-09 04:53:40,929 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-09 04:53:40,930 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-09 04:53:40,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 04:53:41,132 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:53:41,135 INFO L407 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:53:41,164 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-09 04:53:41,168 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 04:53:41 BoogieIcfgContainer [2024-11-09 04:53:41,168 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-09 04:53:41,169 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-09 04:53:41,169 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-09 04:53:41,169 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-09 04:53:41,170 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:48:43" (3/4) ... [2024-11-09 04:53:41,171 INFO L136 WitnessPrinter]: Generating witness for reachability counterexample [2024-11-09 04:53:41,224 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/witness.graphml [2024-11-09 04:53:41,225 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-09 04:53:41,225 INFO L158 Benchmark]: Toolchain (without parser) took 299072.90ms. Allocated memory was 146.8MB in the beginning and 295.7MB in the end (delta: 148.9MB). Free memory was 113.0MB in the beginning and 92.2MB in the end (delta: 20.8MB). Peak memory consumption was 171.8MB. Max. memory is 16.1GB. [2024-11-09 04:53:41,226 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 146.8MB. Free memory was 90.8MB in the beginning and 90.6MB in the end (delta: 159.9kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 04:53:41,226 INFO L158 Benchmark]: CACSL2BoogieTranslator took 360.26ms. Allocated memory is still 146.8MB. Free memory was 112.5MB in the beginning and 99.5MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-11-09 04:53:41,227 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.05ms. Allocated memory is still 146.8MB. Free memory was 99.5MB in the beginning and 97.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-09 04:53:41,227 INFO L158 Benchmark]: Boogie Preprocessor took 38.50ms. Allocated memory is still 146.8MB. Free memory was 97.8MB in the beginning and 96.9MB in the end (delta: 987.8kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 04:53:41,227 INFO L158 Benchmark]: RCFGBuilder took 442.93ms. Allocated memory is still 146.8MB. Free memory was 96.9MB in the beginning and 83.8MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-11-09 04:53:41,228 INFO L158 Benchmark]: TraceAbstraction took 298124.20ms. Allocated memory was 146.8MB in the beginning and 295.7MB in the end (delta: 148.9MB). Free memory was 83.2MB in the beginning and 95.3MB in the end (delta: -12.2MB). Peak memory consumption was 138.3MB. Max. memory is 16.1GB. [2024-11-09 04:53:41,228 INFO L158 Benchmark]: Witness Printer took 56.26ms. Allocated memory is still 295.7MB. Free memory was 94.3MB in the beginning and 92.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-09 04:53:41,230 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 146.8MB. Free memory was 90.8MB in the beginning and 90.6MB in the end (delta: 159.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 360.26ms. Allocated memory is still 146.8MB. Free memory was 112.5MB in the beginning and 99.5MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.05ms. Allocated memory is still 146.8MB. Free memory was 99.5MB in the beginning and 97.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 38.50ms. Allocated memory is still 146.8MB. Free memory was 97.8MB in the beginning and 96.9MB in the end (delta: 987.8kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 442.93ms. Allocated memory is still 146.8MB. Free memory was 96.9MB in the beginning and 83.8MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 298124.20ms. Allocated memory was 146.8MB in the beginning and 295.7MB in the end (delta: 148.9MB). Free memory was 83.2MB in the beginning and 95.3MB in the end (delta: -12.2MB). Peak memory consumption was 138.3MB. Max. memory is 16.1GB. * Witness Printer took 56.26ms. Allocated memory is still 295.7MB. Free memory was 94.3MB in the beginning and 92.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L25] CALL assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [\old(cond)=1, counter=0] [L9] COND FALSE !(!cond) [L25] RET assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [A=3, R=0, counter=0] [L27] CALL assume_abort_if_not(A % 2 == 1) VAL [\old(cond)=1, counter=0] [L9] COND FALSE !(!cond) [L27] RET assume_abort_if_not(A % 2 == 1) VAL [A=3, R=0, counter=0] [L29] u = ((long long) 2 * R) + 1 [L30] v = 1 [L31] r = ((long long) R * R) - A VAL [A=3, counter=0, r=-3, u=1, v=1] [L34] EXPR counter++ VAL [A=3, counter=1, r=-3, u=1, v=1] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=1] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=3, counter=1, r=-3, u=1, v=1] [L36] COND FALSE !(!(r != 0)) VAL [A=3, counter=1, r=-3, u=1, v=1] [L39] EXPR counter++ VAL [A=3, counter=2, r=-3, u=1, v=1] [L39] COND TRUE counter++<5 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=2] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=2] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=3, counter=2, r=-3, u=1, v=1] [L41] COND TRUE !(r > 0) VAL [A=3, counter=2, r=-3, u=1, v=1] [L47] EXPR counter++ VAL [A=3, counter=3, r=-3, u=1, v=1] [L47] COND TRUE counter++<5 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=3] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=3] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=3, counter=3, r=-3, u=1, v=1] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [A=3, counter=3, r=-2, u=3, v=1] [L47] EXPR counter++ VAL [A=3, counter=4, r=-2, u=3, v=1] [L47] COND TRUE counter++<5 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=4] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=4] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=3, counter=4, r=-2, u=3, v=1] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [A=3, counter=4, r=1, u=5, v=1] [L47] EXPR counter++ VAL [A=3, counter=5, r=1, u=5, v=1] [L47] COND TRUE counter++<5 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=5] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=5] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=3, counter=5, r=1, u=5, v=1] [L49] COND TRUE !(r < 0) VAL [A=3, counter=5, r=1, u=5, v=1] [L34] EXPR counter++ VAL [A=3, counter=6, r=1, u=5, v=1] [L34] COND FALSE !(counter++<5) [L56] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=0, counter=6] [L12] COND TRUE !(cond) VAL [\old(cond)=0, counter=6] [L14] reach_error() VAL [\old(cond)=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 298.0s, OverallIterations: 13, TraceHistogramMax: 6, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 15.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 5 mSolverCounterUnknown, 249 SdHoareTripleChecker+Valid, 15.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 231 mSDsluCounter, 1583 SdHoareTripleChecker+Invalid, 15.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 36 IncrementalHoareTripleChecker+Unchecked, 1218 mSDsCounter, 60 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 837 IncrementalHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 60 mSolverCounterUnsat, 365 mSDtfsCounter, 837 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 743 GetRequests, 525 SyntacticMatches, 26 SemanticMatches, 192 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1810 ImplicationChecksByTransitivity, 259.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=101occurred in iteration=12, InterpolantAutomatonStates: 93, 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, 59 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.7s InterpolantComputationTime, 703 NumberOfCodeBlocks, 703 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 750 ConstructedInterpolants, 0 QuantifiedInterpolants, 2321 SizeOfPredicates, 13 NumberOfNonLiveVariables, 695 ConjunctsInSsa, 70 ConjunctsInUnsatCore, 23 InterpolantComputations, 6 PerfectInterpolantSequences, 408/498 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 5.2s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 3, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 17, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 14, TOOLS_POST_TIME: 0.4s, TOOLS_POST_CALL_APPLICATIONS: 10, TOOLS_POST_CALL_TIME: 0.4s, TOOLS_POST_RETURN_APPLICATIONS: 6, TOOLS_POST_RETURN_TIME: 0.1s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 30, TOOLS_QUANTIFIERELIM_TIME: 0.9s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 46, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 10, DOMAIN_JOIN_TIME: 0.2s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 17, DOMAIN_ISBOTTOM_TIME: 4.0s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 6, CALL_SUMMARIZER_CACHE_MISSES: 2, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 146, DAG_COMPRESSION_RETAINED_NODES: 50, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2024-11-09 04:53:41,443 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2024-11-09 04:53:41,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b7b27ed-6c18-4fe7-82f6-f488b170a315/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE