./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/partial_mod_count_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-programs/partial_mod_count_1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a899e425fabfbfedb683b8dde873d61190b064645b1f5edf26c70c4b83dfe4a2 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 08:32:02,211 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 08:32:02,275 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 08:32:02,280 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 08:32:02,280 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 08:32:02,304 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 08:32:02,305 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 08:32:02,305 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 08:32:02,306 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 08:32:02,307 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 08:32:02,307 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 08:32:02,308 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 08:32:02,308 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 08:32:02,309 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 08:32:02,309 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 08:32:02,310 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 08:32:02,310 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 08:32:02,311 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 08:32:02,311 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 08:32:02,312 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 08:32:02,312 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 08:32:02,313 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 08:32:02,314 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 08:32:02,314 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 08:32:02,315 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 08:32:02,315 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 08:32:02,315 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 08:32:02,316 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 08:32:02,316 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 08:32:02,317 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 08:32:02,317 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 08:32:02,317 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 08:32:02,318 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 08:32:02,318 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 08:32:02,318 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 08:32:02,318 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 08:32:02,319 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 08:32:02,319 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 08:32:02,319 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 08:32:02,319 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 08:32:02,319 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 08:32:02,320 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 08:32:02,320 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 08:32:02,320 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 08:32:02,320 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 08:32:02,320 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 08:32:02,321 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 08:32:02,321 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_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a899e425fabfbfedb683b8dde873d61190b064645b1f5edf26c70c4b83dfe4a2 [2023-12-02 08:32:02,525 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 08:32:02,544 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 08:32:02,547 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 08:32:02,549 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 08:32:02,549 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 08:32:02,551 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/array-programs/partial_mod_count_1.c [2023-12-02 08:32:05,302 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 08:32:05,466 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 08:32:05,467 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/sv-benchmarks/c/array-programs/partial_mod_count_1.c [2023-12-02 08:32:05,472 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/data/fc04cf98c/a777feb07cdd4130b35269958293c2c0/FLAG45e2aa678 [2023-12-02 08:32:05,484 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/data/fc04cf98c/a777feb07cdd4130b35269958293c2c0 [2023-12-02 08:32:05,486 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 08:32:05,487 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 08:32:05,488 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 08:32:05,488 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 08:32:05,494 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 08:32:05,494 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:32:05" (1/1) ... [2023-12-02 08:32:05,496 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c5f2071 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:32:05, skipping insertion in model container [2023-12-02 08:32:05,496 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:32:05" (1/1) ... [2023-12-02 08:32:05,515 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 08:32:05,655 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/sv-benchmarks/c/array-programs/partial_mod_count_1.c[323,336] [2023-12-02 08:32:05,670 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 08:32:05,679 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 08:32:05,692 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/sv-benchmarks/c/array-programs/partial_mod_count_1.c[323,336] [2023-12-02 08:32:05,698 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 08:32:05,713 INFO L206 MainTranslator]: Completed translation [2023-12-02 08:32:05,713 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:32:05 WrapperNode [2023-12-02 08:32:05,713 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 08:32:05,715 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 08:32:05,715 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 08:32:05,715 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 08:32:05,721 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:32:05" (1/1) ... [2023-12-02 08:32:05,727 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:32:05" (1/1) ... [2023-12-02 08:32:05,744 INFO L138 Inliner]: procedures = 13, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 52 [2023-12-02 08:32:05,744 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 08:32:05,745 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 08:32:05,745 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 08:32:05,745 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 08:32:05,752 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:32:05" (1/1) ... [2023-12-02 08:32:05,753 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:32:05" (1/1) ... [2023-12-02 08:32:05,754 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:32:05" (1/1) ... [2023-12-02 08:32:05,755 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:32:05" (1/1) ... [2023-12-02 08:32:05,760 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:32:05" (1/1) ... [2023-12-02 08:32:05,763 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:32:05" (1/1) ... [2023-12-02 08:32:05,764 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:32:05" (1/1) ... [2023-12-02 08:32:05,765 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:32:05" (1/1) ... [2023-12-02 08:32:05,767 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 08:32:05,768 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 08:32:05,768 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 08:32:05,769 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 08:32:05,769 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:32:05" (1/1) ... [2023-12-02 08:32:05,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 08:32:05,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:32:05,800 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 08:32:05,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 08:32:05,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 08:32:05,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 08:32:05,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 08:32:05,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 08:32:05,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 08:32:05,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 08:32:05,826 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 08:32:05,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 08:32:05,891 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 08:32:05,893 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 08:32:06,019 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 08:32:06,080 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 08:32:06,080 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 08:32:06,082 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:32:06 BoogieIcfgContainer [2023-12-02 08:32:06,082 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 08:32:06,085 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 08:32:06,085 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 08:32:06,089 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 08:32:06,089 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 08:32:05" (1/3) ... [2023-12-02 08:32:06,090 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b0b11b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:32:06, skipping insertion in model container [2023-12-02 08:32:06,090 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:32:05" (2/3) ... [2023-12-02 08:32:06,090 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b0b11b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:32:06, skipping insertion in model container [2023-12-02 08:32:06,090 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:32:06" (3/3) ... [2023-12-02 08:32:06,092 INFO L112 eAbstractionObserver]: Analyzing ICFG partial_mod_count_1.c [2023-12-02 08:32:06,107 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 08:32:06,107 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 08:32:06,143 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 08:32:06,149 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@706ace43, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 08:32:06,149 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 08:32:06,154 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:32:06,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 08:32:06,159 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:32:06,160 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 08:32:06,160 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:32:06,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:32:06,164 INFO L85 PathProgramCache]: Analyzing trace with hash 84220407, now seen corresponding path program 1 times [2023-12-02 08:32:06,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:32:06,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323094730] [2023-12-02 08:32:06,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:32:06,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:32:06,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:32:06,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 08:32:06,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:32:06,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323094730] [2023-12-02 08:32:06,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323094730] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:32:06,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:32:06,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 08:32:06,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951184389] [2023-12-02 08:32:06,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:32:06,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:32:06,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:32:06,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:32:06,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 08:32:06,441 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:32:06,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:32:06,478 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2023-12-02 08:32:06,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:32:06,481 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-12-02 08:32:06,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:32:06,487 INFO L225 Difference]: With dead ends: 15 [2023-12-02 08:32:06,487 INFO L226 Difference]: Without dead ends: 8 [2023-12-02 08:32:06,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 08:32:06,494 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 08:32:06,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 08:32:06,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2023-12-02 08:32:06,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2023-12-02 08:32:06,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:32:06,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2023-12-02 08:32:06,520 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2023-12-02 08:32:06,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:32:06,521 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2023-12-02 08:32:06,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:32:06,521 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2023-12-02 08:32:06,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 08:32:06,522 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:32:06,522 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 08:32:06,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 08:32:06,523 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:32:06,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:32:06,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1681222870, now seen corresponding path program 1 times [2023-12-02 08:32:06,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:32:06,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202898014] [2023-12-02 08:32:06,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:32:06,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:32:06,546 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:32:06,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1619437737] [2023-12-02 08:32:06,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:32:06,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:32:06,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:32:06,552 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:32:06,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 08:32:06,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:32:06,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 08:32:06,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:32:06,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 08:32:06,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:32:06,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 08:32:06,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:32:06,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202898014] [2023-12-02 08:32:06,702 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:32:06,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619437737] [2023-12-02 08:32:06,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619437737] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:32:06,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1710135840] [2023-12-02 08:32:06,722 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-12-02 08:32:06,722 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:32:06,725 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:32:06,729 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:32:06,730 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:32:07,123 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:32:07,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1710135840] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:32:07,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:32:07,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3] total 8 [2023-12-02 08:32:07,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345587238] [2023-12-02 08:32:07,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:32:07,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 08:32:07,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:32:07,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 08:32:07,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-12-02 08:32:07,241 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:32:07,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:32:07,280 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2023-12-02 08:32:07,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 08:32:07,280 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-12-02 08:32:07,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:32:07,281 INFO L225 Difference]: With dead ends: 13 [2023-12-02 08:32:07,281 INFO L226 Difference]: Without dead ends: 11 [2023-12-02 08:32:07,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-12-02 08:32:07,283 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 08:32:07,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 5 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 08:32:07,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-12-02 08:32:07,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2023-12-02 08:32:07,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:32:07,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2023-12-02 08:32:07,287 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2023-12-02 08:32:07,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:32:07,288 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2023-12-02 08:32:07,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:32:07,288 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2023-12-02 08:32:07,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 08:32:07,289 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:32:07,289 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:32:07,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 08:32:07,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:32:07,490 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:32:07,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:32:07,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1691756212, now seen corresponding path program 1 times [2023-12-02 08:32:07,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:32:07,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268652070] [2023-12-02 08:32:07,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:32:07,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:32:07,504 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:32:07,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1763262727] [2023-12-02 08:32:07,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:32:07,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:32:07,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:32:07,506 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:32:07,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 08:32:07,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:32:07,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 08:32:07,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:32:07,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 08:32:07,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:32:07,609 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 08:32:07,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:32:07,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268652070] [2023-12-02 08:32:07,610 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:32:07,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763262727] [2023-12-02 08:32:07,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763262727] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:32:07,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [696295461] [2023-12-02 08:32:07,613 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-12-02 08:32:07,613 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:32:07,614 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:32:07,614 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:32:07,614 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:32:07,971 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:32:08,110 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '168#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~R~0#1| 1) (= ~N~0 1000000))' at error location [2023-12-02 08:32:08,110 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:32:08,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:32:08,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-12-02 08:32:08,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605859372] [2023-12-02 08:32:08,111 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:32:08,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 08:32:08,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:32:08,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 08:32:08,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-12-02 08:32:08,113 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:32:08,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:32:08,146 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2023-12-02 08:32:08,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 08:32:08,147 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-12-02 08:32:08,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:32:08,147 INFO L225 Difference]: With dead ends: 20 [2023-12-02 08:32:08,147 INFO L226 Difference]: Without dead ends: 13 [2023-12-02 08:32:08,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-12-02 08:32:08,149 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 08:32:08,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 08:32:08,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-12-02 08:32:08,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-12-02 08:32:08,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:32:08,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2023-12-02 08:32:08,155 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2023-12-02 08:32:08,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:32:08,155 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2023-12-02 08:32:08,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:32:08,156 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2023-12-02 08:32:08,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 08:32:08,156 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:32:08,156 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2023-12-02 08:32:08,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 08:32:08,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:32:08,360 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:32:08,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:32:08,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1409067361, now seen corresponding path program 2 times [2023-12-02 08:32:08,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:32:08,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169411396] [2023-12-02 08:32:08,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:32:08,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:32:08,374 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:32:08,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [719842981] [2023-12-02 08:32:08,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 08:32:08,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:32:08,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:32:08,376 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:32:08,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 08:32:08,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 08:32:08,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 08:32:08,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 08:32:08,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:32:08,695 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 08:32:08,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 62 [2023-12-02 08:32:08,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 08:32:08,792 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:32:09,192 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 08:32:09,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 107 [2023-12-02 08:32:09,601 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 08:32:09,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:32:09,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169411396] [2023-12-02 08:32:09,601 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:32:09,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719842981] [2023-12-02 08:32:09,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719842981] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:32:09,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1837345209] [2023-12-02 08:32:09,604 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-12-02 08:32:09,604 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:32:09,605 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:32:09,605 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:32:09,605 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:32:09,817 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:32:09,978 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '298#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~R~0#1| 1) (= ~N~0 1000000))' at error location [2023-12-02 08:32:09,979 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:32:09,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:32:09,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-12-02 08:32:09,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447278857] [2023-12-02 08:32:09,979 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:32:09,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 08:32:09,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:32:09,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 08:32:09,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-12-02 08:32:09,981 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:32:10,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:32:10,259 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2023-12-02 08:32:10,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 08:32:10,259 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-12-02 08:32:10,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:32:10,260 INFO L225 Difference]: With dead ends: 25 [2023-12-02 08:32:10,260 INFO L226 Difference]: Without dead ends: 23 [2023-12-02 08:32:10,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2023-12-02 08:32:10,262 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 8 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:32:10,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 8 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:32:10,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-02 08:32:10,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2023-12-02 08:32:10,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:32:10,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2023-12-02 08:32:10,271 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 12 [2023-12-02 08:32:10,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:32:10,272 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2023-12-02 08:32:10,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:32:10,272 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2023-12-02 08:32:10,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-02 08:32:10,273 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:32:10,273 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1] [2023-12-02 08:32:10,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 08:32:10,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:32:10,480 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:32:10,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:32:10,481 INFO L85 PathProgramCache]: Analyzing trace with hash -2018100041, now seen corresponding path program 3 times [2023-12-02 08:32:10,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:32:10,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982864607] [2023-12-02 08:32:10,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:32:10,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:32:10,497 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:32:10,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [936399779] [2023-12-02 08:32:10,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 08:32:10,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:32:10,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:32:10,498 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:32:10,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 08:32:10,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 08:32:10,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 08:32:10,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 08:32:10,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:32:10,634 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 08:32:10,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:32:10,700 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 08:32:10,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:32:10,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982864607] [2023-12-02 08:32:10,700 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:32:10,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936399779] [2023-12-02 08:32:10,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936399779] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:32:10,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [671517560] [2023-12-02 08:32:10,703 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-12-02 08:32:10,703 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:32:10,703 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:32:10,703 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:32:10,703 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:32:11,033 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:32:11,277 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '508#(and (<= 1 ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|))' at error location [2023-12-02 08:32:11,277 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:32:11,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:32:11,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-12-02 08:32:11,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952517104] [2023-12-02 08:32:11,278 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:32:11,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 08:32:11,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:32:11,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 08:32:11,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2023-12-02 08:32:11,280 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:32:11,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:32:11,326 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2023-12-02 08:32:11,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 08:32:11,327 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-12-02 08:32:11,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:32:11,328 INFO L225 Difference]: With dead ends: 44 [2023-12-02 08:32:11,328 INFO L226 Difference]: Without dead ends: 28 [2023-12-02 08:32:11,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2023-12-02 08:32:11,330 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 08:32:11,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 08:32:11,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-12-02 08:32:11,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-12-02 08:32:11,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:32:11,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2023-12-02 08:32:11,338 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 21 [2023-12-02 08:32:11,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:32:11,338 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2023-12-02 08:32:11,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:32:11,339 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2023-12-02 08:32:11,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 08:32:11,340 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:32:11,340 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 4, 4, 1, 1, 1, 1] [2023-12-02 08:32:11,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 08:32:11,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:32:11,544 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:32:11,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:32:11,544 INFO L85 PathProgramCache]: Analyzing trace with hash -950065193, now seen corresponding path program 4 times [2023-12-02 08:32:11,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:32:11,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075299053] [2023-12-02 08:32:11,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:32:11,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:32:11,564 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:32:11,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [561721314] [2023-12-02 08:32:11,565 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 08:32:11,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:32:11,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:32:11,566 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:32:11,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 08:32:11,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:32:11,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 08:32:11,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:32:11,811 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 08:32:11,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:32:12,042 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 08:32:12,042 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:32:12,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075299053] [2023-12-02 08:32:12,042 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:32:12,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561721314] [2023-12-02 08:32:12,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561721314] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:32:12,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1981396146] [2023-12-02 08:32:12,044 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-12-02 08:32:12,044 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:32:12,044 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:32:12,044 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:32:12,045 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:32:12,265 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:32:12,432 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '802#(and (<= 1 ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|))' at error location [2023-12-02 08:32:12,432 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:32:12,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:32:12,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2023-12-02 08:32:12,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909911935] [2023-12-02 08:32:12,433 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:32:12,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-02 08:32:12,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:32:12,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-02 08:32:12,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=523, Unknown=0, NotChecked=0, Total=812 [2023-12-02 08:32:12,435 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:32:12,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:32:12,493 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2023-12-02 08:32:12,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 08:32:12,494 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-12-02 08:32:12,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:32:12,495 INFO L225 Difference]: With dead ends: 56 [2023-12-02 08:32:12,495 INFO L226 Difference]: Without dead ends: 40 [2023-12-02 08:32:12,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=289, Invalid=523, Unknown=0, NotChecked=0, Total=812 [2023-12-02 08:32:12,496 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 12 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 [2023-12-02 08:32:12,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 12 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 08:32:12,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-12-02 08:32:12,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-12-02 08:32:12,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:32:12,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2023-12-02 08:32:12,505 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 27 [2023-12-02 08:32:12,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:32:12,506 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2023-12-02 08:32:12,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:32:12,506 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2023-12-02 08:32:12,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-02 08:32:12,507 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:32:12,507 INFO L195 NwaCegarLoop]: trace histogram [22, 5, 4, 4, 1, 1, 1, 1] [2023-12-02 08:32:12,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 08:32:12,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:32:12,708 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:32:12,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:32:12,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1187744233, now seen corresponding path program 5 times [2023-12-02 08:32:12,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:32:12,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845906927] [2023-12-02 08:32:12,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:32:12,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:32:12,734 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:32:12,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1075443658] [2023-12-02 08:32:12,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 08:32:12,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:32:12,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:32:12,735 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:32:12,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 08:32:12,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 08:32:12,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 08:32:12,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 08:32:12,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:32:13,591 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 08:32:13,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 116 treesize of output 180 [2023-12-02 08:32:13,781 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-12-02 08:32:13,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:32:16,187 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 08:32:16,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 415 treesize of output 567 [2023-12-02 08:32:20,636 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-12-02 08:32:20,636 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:32:20,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845906927] [2023-12-02 08:32:20,637 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:32:20,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075443658] [2023-12-02 08:32:20,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075443658] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:32:20,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1267943181] [2023-12-02 08:32:20,639 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-12-02 08:32:20,639 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:32:20,639 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:32:20,639 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:32:20,639 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:32:20,793 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:32:20,990 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1208#(and (<= 1 ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|))' at error location [2023-12-02 08:32:20,991 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:32:20,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:32:20,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-12-02 08:32:20,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064944254] [2023-12-02 08:32:20,991 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:32:20,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 08:32:20,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:32:20,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 08:32:20,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2023-12-02 08:32:20,993 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:32:22,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:32:22,431 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2023-12-02 08:32:22,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 08:32:22,432 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-12-02 08:32:22,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:32:22,433 INFO L225 Difference]: With dead ends: 61 [2023-12-02 08:32:22,433 INFO L226 Difference]: Without dead ends: 59 [2023-12-02 08:32:22,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=307, Invalid=749, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 08:32:22,434 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 17 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:32:22,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 14 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:32:22,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-12-02 08:32:22,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2023-12-02 08:32:22,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:32:22,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2023-12-02 08:32:22,446 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 39 [2023-12-02 08:32:22,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:32:22,446 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2023-12-02 08:32:22,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:32:22,446 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2023-12-02 08:32:22,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-02 08:32:22,447 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:32:22,448 INFO L195 NwaCegarLoop]: trace histogram [22, 11, 10, 10, 1, 1, 1, 1] [2023-12-02 08:32:22,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 08:32:22,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:32:22,648 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:32:22,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:32:22,649 INFO L85 PathProgramCache]: Analyzing trace with hash 594404119, now seen corresponding path program 6 times [2023-12-02 08:32:22,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:32:22,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629920505] [2023-12-02 08:32:22,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:32:22,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:32:22,674 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:32:22,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [947194536] [2023-12-02 08:32:22,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 08:32:22,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:32:22,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:32:22,675 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:32:22,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 08:32:22,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 08:32:22,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 08:32:22,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 08:32:22,828 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:32:23,169 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2023-12-02 08:32:23,169 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:32:23,850 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2023-12-02 08:32:23,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:32:23,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629920505] [2023-12-02 08:32:23,850 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:32:23,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947194536] [2023-12-02 08:32:23,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947194536] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:32:23,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1296965996] [2023-12-02 08:32:23,852 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-12-02 08:32:23,853 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:32:23,853 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:32:23,853 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:32:23,853 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:32:23,978 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:32:24,159 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1808#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~R~0#1| 1) (= ~N~0 1000000))' at error location [2023-12-02 08:32:24,159 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:32:24,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:32:24,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2023-12-02 08:32:24,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611806622] [2023-12-02 08:32:24,159 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:32:24,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-12-02 08:32:24,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:32:24,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-12-02 08:32:24,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1141, Invalid=1615, Unknown=0, NotChecked=0, Total=2756 [2023-12-02 08:32:24,163 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:32:24,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:32:24,295 INFO L93 Difference]: Finished difference Result 116 states and 141 transitions. [2023-12-02 08:32:24,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-12-02 08:32:24,296 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-12-02 08:32:24,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:32:24,297 INFO L225 Difference]: With dead ends: 116 [2023-12-02 08:32:24,297 INFO L226 Difference]: Without dead ends: 82 [2023-12-02 08:32:24,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1141, Invalid=1615, Unknown=0, NotChecked=0, Total=2756 [2023-12-02 08:32:24,299 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:32:24,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 18 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:32:24,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-12-02 08:32:24,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2023-12-02 08:32:24,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:32:24,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2023-12-02 08:32:24,317 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 57 [2023-12-02 08:32:24,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:32:24,317 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2023-12-02 08:32:24,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:32:24,318 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2023-12-02 08:32:24,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-02 08:32:24,320 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:32:24,320 INFO L195 NwaCegarLoop]: trace histogram [46, 11, 10, 10, 1, 1, 1, 1] [2023-12-02 08:32:24,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 08:32:24,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:32:24,521 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:32:24,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:32:24,521 INFO L85 PathProgramCache]: Analyzing trace with hash 828915607, now seen corresponding path program 7 times [2023-12-02 08:32:24,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:32:24,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077282887] [2023-12-02 08:32:24,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:32:24,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:32:24,558 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:32:24,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [598318156] [2023-12-02 08:32:24,558 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 08:32:24,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:32:24,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:32:24,559 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:32:24,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 08:32:24,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:32:24,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-02 08:32:24,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:32:25,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1236 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2023-12-02 08:32:25,865 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:32:28,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1236 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2023-12-02 08:32:28,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:32:28,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077282887] [2023-12-02 08:32:28,557 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:32:28,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598318156] [2023-12-02 08:32:28,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598318156] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:32:28,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1641446445] [2023-12-02 08:32:28,559 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-12-02 08:32:28,559 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:32:28,559 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:32:28,559 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:32:28,559 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:32:28,723 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:32:29,074 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2714#(and (<= 1 ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|))' at error location [2023-12-02 08:32:29,074 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:32:29,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:32:29,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 95 [2023-12-02 08:32:29,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151950083] [2023-12-02 08:32:29,075 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:32:29,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2023-12-02 08:32:29,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:32:29,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2023-12-02 08:32:29,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4573, Invalid=5527, Unknown=0, NotChecked=0, Total=10100 [2023-12-02 08:32:29,080 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 96 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 95 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:32:29,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:32:29,286 INFO L93 Difference]: Finished difference Result 164 states and 213 transitions. [2023-12-02 08:32:29,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-12-02 08:32:29,287 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 95 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2023-12-02 08:32:29,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:32:29,288 INFO L225 Difference]: With dead ends: 164 [2023-12-02 08:32:29,288 INFO L226 Difference]: Without dead ends: 130 [2023-12-02 08:32:29,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4573, Invalid=5527, Unknown=0, NotChecked=0, Total=10100 [2023-12-02 08:32:29,292 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:32:29,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 18 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:32:29,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-12-02 08:32:29,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2023-12-02 08:32:29,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.0155038759689923) internal successors, (131), 129 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:32:29,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2023-12-02 08:32:29,313 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 81 [2023-12-02 08:32:29,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:32:29,314 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2023-12-02 08:32:29,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 95 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:32:29,314 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2023-12-02 08:32:29,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-12-02 08:32:29,317 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:32:29,317 INFO L195 NwaCegarLoop]: trace histogram [94, 11, 10, 10, 1, 1, 1, 1] [2023-12-02 08:32:29,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 08:32:29,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:32:29,518 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:32:29,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:32:29,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1890289513, now seen corresponding path program 8 times [2023-12-02 08:32:29,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:32:29,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275892722] [2023-12-02 08:32:29,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:32:29,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:32:29,586 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:32:29,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1619335844] [2023-12-02 08:32:29,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 08:32:29,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:32:29,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:32:29,587 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:32:29,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 08:32:33,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-12-02 08:32:33,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 08:32:33,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 08:32:33,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:32:36,414 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 08:32:36,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 210 treesize of output 634 [2023-12-02 08:32:38,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4620 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2023-12-02 08:32:38,257 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:32:54,599 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 08:32:54,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 1178 treesize of output 2002 [2023-12-02 08:33:57,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4620 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2023-12-02 08:33:57,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:33:57,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275892722] [2023-12-02 08:33:57,952 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:33:57,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619335844] [2023-12-02 08:33:57,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619335844] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:33:57,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1197147569] [2023-12-02 08:33:57,953 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-12-02 08:33:57,954 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:33:57,954 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:33:57,954 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:33:57,954 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:33:58,119 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:33:58,456 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4032#(and (<= 1 ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|))' at error location [2023-12-02 08:33:58,456 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:33:58,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:33:58,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2023-12-02 08:33:58,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644815849] [2023-12-02 08:33:58,456 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:33:58,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-02 08:33:58,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:33:58,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-02 08:33:58,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=751, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 08:33:58,458 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:34:12,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:34:12,270 INFO L93 Difference]: Finished difference Result 169 states and 181 transitions. [2023-12-02 08:34:12,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-12-02 08:34:12,270 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2023-12-02 08:34:12,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:34:12,272 INFO L225 Difference]: With dead ends: 169 [2023-12-02 08:34:12,272 INFO L226 Difference]: Without dead ends: 167 [2023-12-02 08:34:12,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 352 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=1249, Invalid=2657, Unknown=0, NotChecked=0, Total=3906 [2023-12-02 08:34:12,275 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 35 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 08:34:12,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 28 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 08:34:12,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-12-02 08:34:12,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2023-12-02 08:34:12,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.0121212121212122) internal successors, (167), 165 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:34:12,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2023-12-02 08:34:12,313 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 129 [2023-12-02 08:34:12,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:34:12,314 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2023-12-02 08:34:12,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:34:12,314 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2023-12-02 08:34:12,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-12-02 08:34:12,317 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:34:12,317 INFO L195 NwaCegarLoop]: trace histogram [94, 23, 22, 22, 1, 1, 1, 1] [2023-12-02 08:34:12,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 08:34:12,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 08:34:12,517 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:34:12,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:34:12,518 INFO L85 PathProgramCache]: Analyzing trace with hash -961097065, now seen corresponding path program 9 times [2023-12-02 08:34:12,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:34:12,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573931571] [2023-12-02 08:34:12,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:34:12,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:34:12,592 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:34:12,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1548931679] [2023-12-02 08:34:12,592 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 08:34:12,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:34:12,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:34:12,593 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:34:12,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 08:34:13,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 08:34:13,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 08:34:13,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 1191 conjuncts, 97 conjunts are in the unsatisfiable core [2023-12-02 08:34:13,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:34:16,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5202 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2023-12-02 08:34:16,768 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:34:27,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5202 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2023-12-02 08:34:27,123 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:34:27,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573931571] [2023-12-02 08:34:27,123 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:34:27,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548931679] [2023-12-02 08:34:27,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548931679] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:34:27,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [503660523] [2023-12-02 08:34:27,125 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-12-02 08:34:27,125 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:34:27,125 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:34:27,126 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:34:27,126 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:34:27,291 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:34:27,797 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5844#(and (<= 1 ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|))' at error location [2023-12-02 08:34:27,797 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:34:27,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:34:27,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 191 [2023-12-02 08:34:27,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316036678] [2023-12-02 08:34:27,798 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:34:27,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2023-12-02 08:34:27,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:34:27,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2023-12-02 08:34:27,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18349, Invalid=20263, Unknown=0, NotChecked=0, Total=38612 [2023-12-02 08:34:27,815 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand has 192 states, 192 states have (on average 1.0260416666666667) internal successors, (197), 191 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:34:28,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:34:28,405 INFO L93 Difference]: Finished difference Result 332 states and 429 transitions. [2023-12-02 08:34:28,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2023-12-02 08:34:28,406 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 192 states have (on average 1.0260416666666667) internal successors, (197), 191 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2023-12-02 08:34:28,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:34:28,407 INFO L225 Difference]: With dead ends: 332 [2023-12-02 08:34:28,407 INFO L226 Difference]: Without dead ends: 262 [2023-12-02 08:34:28,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=18349, Invalid=20263, Unknown=0, NotChecked=0, Total=38612 [2023-12-02 08:34:28,411 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 08:34:28,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 30 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 08:34:28,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2023-12-02 08:34:28,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2023-12-02 08:34:28,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.0076628352490422) internal successors, (263), 261 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:34:28,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 263 transitions. [2023-12-02 08:34:28,473 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 263 transitions. Word has length 165 [2023-12-02 08:34:28,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:34:28,473 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 263 transitions. [2023-12-02 08:34:28,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 192 states have (on average 1.0260416666666667) internal successors, (197), 191 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:34:28,474 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 263 transitions. [2023-12-02 08:34:28,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2023-12-02 08:34:28,477 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:34:28,478 INFO L195 NwaCegarLoop]: trace histogram [190, 23, 22, 22, 1, 1, 1, 1] [2023-12-02 08:34:28,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-02 08:34:28,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-02 08:34:28,678 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:34:28,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:34:28,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1906066583, now seen corresponding path program 10 times [2023-12-02 08:34:28,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:34:28,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101647888] [2023-12-02 08:34:28,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:34:28,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:34:28,803 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:34:28,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331488807] [2023-12-02 08:34:28,804 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 08:34:28,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:34:28,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:34:28,805 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:34:28,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 08:34:29,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:34:29,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 2151 conjuncts, 193 conjunts are in the unsatisfiable core [2023-12-02 08:34:29,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:34:43,313 INFO L134 CoverageAnalysis]: Checked inductivity of 18882 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2023-12-02 08:34:43,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:35:24,910 INFO L134 CoverageAnalysis]: Checked inductivity of 18882 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2023-12-02 08:35:24,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:35:24,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101647888] [2023-12-02 08:35:24,911 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:35:24,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331488807] [2023-12-02 08:35:24,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331488807] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:35:24,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1945495923] [2023-12-02 08:35:24,913 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-12-02 08:35:24,913 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:35:24,913 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:35:24,913 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:35:24,913 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:35:25,038 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:35:25,630 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8838#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~R~0#1| 1) (= ~N~0 1000000))' at error location [2023-12-02 08:35:25,631 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:35:25,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:35:25,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192] total 383 [2023-12-02 08:35:25,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926121002] [2023-12-02 08:35:25,631 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:35:25,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 384 states [2023-12-02 08:35:25,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:35:25,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 384 interpolants. [2023-12-02 08:35:25,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73549, Invalid=77383, Unknown=0, NotChecked=0, Total=150932 [2023-12-02 08:35:25,649 INFO L87 Difference]: Start difference. First operand 262 states and 263 transitions. Second operand has 384 states, 384 states have (on average 1.0130208333333333) internal successors, (389), 383 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:35:28,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:35:28,197 INFO L93 Difference]: Finished difference Result 524 states and 717 transitions. [2023-12-02 08:35:28,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2023-12-02 08:35:28,198 INFO L78 Accepts]: Start accepts. Automaton has has 384 states, 384 states have (on average 1.0130208333333333) internal successors, (389), 383 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 261 [2023-12-02 08:35:28,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:35:28,200 INFO L225 Difference]: With dead ends: 524 [2023-12-02 08:35:28,200 INFO L226 Difference]: Without dead ends: 454 [2023-12-02 08:35:28,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 781 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 387 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2858 ImplicationChecksByTransitivity, 55.1s TimeCoverageRelationStatistics Valid=73549, Invalid=77383, Unknown=0, NotChecked=0, Total=150932 [2023-12-02 08:35:28,209 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 08:35:28,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 08:35:28,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2023-12-02 08:35:28,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 454. [2023-12-02 08:35:28,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.0044150110375276) internal successors, (455), 453 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:35:28,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 455 transitions. [2023-12-02 08:35:28,277 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 455 transitions. Word has length 261 [2023-12-02 08:35:28,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:35:28,278 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 455 transitions. [2023-12-02 08:35:28,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 384 states, 384 states have (on average 1.0130208333333333) internal successors, (389), 383 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:35:28,279 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 455 transitions. [2023-12-02 08:35:28,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-12-02 08:35:28,288 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:35:28,288 INFO L195 NwaCegarLoop]: trace histogram [382, 23, 22, 22, 1, 1, 1, 1] [2023-12-02 08:35:28,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 08:35:28,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 08:35:28,489 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:35:28,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:35:28,489 INFO L85 PathProgramCache]: Analyzing trace with hash 853485719, now seen corresponding path program 11 times [2023-12-02 08:35:28,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:35:28,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692263710] [2023-12-02 08:35:28,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:35:28,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:35:28,769 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:35:28,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [278448225] [2023-12-02 08:35:28,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 08:35:28,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:35:28,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:35:28,776 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:35:28,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b7098d-0fde-4f41-ad7e-5bdfab667ed4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process