./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/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_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/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_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/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 4c9c46abbea18888bba6501dfe6c704a11e8fe399c985999e1e07c66bb12b728 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 17:20:04,681 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 17:20:04,743 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 17:20:04,748 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 17:20:04,749 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 17:20:04,772 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 17:20:04,773 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 17:20:04,774 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 17:20:04,774 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 17:20:04,775 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 17:20:04,776 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 17:20:04,776 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 17:20:04,777 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 17:20:04,777 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 17:20:04,778 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 17:20:04,778 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 17:20:04,779 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 17:20:04,779 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 17:20:04,780 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 17:20:04,780 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 17:20:04,781 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 17:20:04,781 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 17:20:04,782 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 17:20:04,783 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 17:20:04,783 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 17:20:04,784 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 17:20:04,784 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 17:20:04,784 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 17:20:04,785 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 17:20:04,785 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 17:20:04,786 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 17:20:04,786 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 17:20:04,786 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 17:20:04,787 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 17:20:04,787 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 17:20:04,788 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 17:20:04,788 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 17:20:04,788 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:20:04,788 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 17:20:04,789 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 17:20:04,789 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 17:20:04,789 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 17:20:04,789 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 17:20:04,790 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 17:20:04,790 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 17:20:04,790 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 17:20:04,790 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 17:20:04,790 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_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4c9c46abbea18888bba6501dfe6c704a11e8fe399c985999e1e07c66bb12b728 [2023-12-02 17:20:04,999 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 17:20:05,020 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 17:20:05,023 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 17:20:05,024 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 17:20:05,025 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 17:20:05,026 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i [2023-12-02 17:20:07,783 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 17:20:07,941 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 17:20:07,941 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i [2023-12-02 17:20:07,949 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/data/d2084c465/9541ced456814819bd76c15f3d3c6775/FLAGd38d50c5e [2023-12-02 17:20:07,960 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/data/d2084c465/9541ced456814819bd76c15f3d3c6775 [2023-12-02 17:20:07,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 17:20:07,963 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 17:20:07,964 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 17:20:07,965 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 17:20:07,970 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 17:20:07,971 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:20:07" (1/1) ... [2023-12-02 17:20:07,972 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58f4ca81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:20:07, skipping insertion in model container [2023-12-02 17:20:07,972 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:20:07" (1/1) ... [2023-12-02 17:20:07,995 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 17:20:08,122 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_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i[832,845] [2023-12-02 17:20:08,141 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:20:08,150 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 17:20:08,163 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_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i[832,845] [2023-12-02 17:20:08,175 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:20:08,187 INFO L206 MainTranslator]: Completed translation [2023-12-02 17:20:08,188 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:20:08 WrapperNode [2023-12-02 17:20:08,188 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 17:20:08,189 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 17:20:08,189 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 17:20:08,189 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 17:20:08,197 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:20:08" (1/1) ... [2023-12-02 17:20:08,203 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:20:08" (1/1) ... [2023-12-02 17:20:08,222 INFO L138 Inliner]: procedures = 18, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 138 [2023-12-02 17:20:08,222 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 17:20:08,223 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 17:20:08,223 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 17:20:08,223 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 17:20:08,231 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:20:08" (1/1) ... [2023-12-02 17:20:08,232 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:20:08" (1/1) ... [2023-12-02 17:20:08,235 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:20:08" (1/1) ... [2023-12-02 17:20:08,235 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:20:08" (1/1) ... [2023-12-02 17:20:08,241 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:20:08" (1/1) ... [2023-12-02 17:20:08,245 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:20:08" (1/1) ... [2023-12-02 17:20:08,246 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:20:08" (1/1) ... [2023-12-02 17:20:08,247 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:20:08" (1/1) ... [2023-12-02 17:20:08,249 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 17:20:08,250 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 17:20:08,250 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 17:20:08,250 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 17:20:08,250 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:20:08" (1/1) ... [2023-12-02 17:20:08,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:20:08,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:20:08,276 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 17:20:08,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 17:20:08,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 17:20:08,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 17:20:08,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 17:20:08,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 17:20:08,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 17:20:08,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 17:20:08,308 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 17:20:08,308 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 17:20:08,308 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 17:20:08,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 17:20:08,386 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 17:20:08,387 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 17:20:08,577 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 17:20:08,655 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 17:20:08,655 INFO L309 CfgBuilder]: Removed 8 assume(true) statements. [2023-12-02 17:20:08,657 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:20:08 BoogieIcfgContainer [2023-12-02 17:20:08,657 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 17:20:08,659 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 17:20:08,660 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 17:20:08,663 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 17:20:08,663 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:20:07" (1/3) ... [2023-12-02 17:20:08,664 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bee66ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:20:08, skipping insertion in model container [2023-12-02 17:20:08,664 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:20:08" (2/3) ... [2023-12-02 17:20:08,664 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bee66ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:20:08, skipping insertion in model container [2023-12-02 17:20:08,665 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:20:08" (3/3) ... [2023-12-02 17:20:08,666 INFO L112 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_ground-1.i [2023-12-02 17:20:08,685 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 17:20:08,685 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 17:20:08,733 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 17:20:08,740 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;@97d745a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 17:20:08,741 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 17:20:08,745 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 17:20:08,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 17:20:08,753 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:20:08,753 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:20:08,754 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:20:08,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:20:08,759 INFO L85 PathProgramCache]: Analyzing trace with hash -917584139, now seen corresponding path program 1 times [2023-12-02 17:20:08,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:20:08,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693350579] [2023-12-02 17:20:08,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:20:08,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:20:08,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:20:08,986 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 17:20:08,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:20:08,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693350579] [2023-12-02 17:20:08,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693350579] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:20:08,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:20:08,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 17:20:08,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529350429] [2023-12-02 17:20:08,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:20:08,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:20:08,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:20:09,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:20:09,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:20:09,036 INFO L87 Difference]: Start difference. First operand has 22 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:20:09,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:20:09,124 INFO L93 Difference]: Finished difference Result 56 states and 90 transitions. [2023-12-02 17:20:09,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:20:09,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-12-02 17:20:09,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:20:09,133 INFO L225 Difference]: With dead ends: 56 [2023-12-02 17:20:09,133 INFO L226 Difference]: Without dead ends: 35 [2023-12-02 17:20:09,135 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 17:20:09,139 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 15 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:20:09,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 25 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:20:09,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-12-02 17:20:09,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2023-12-02 17:20:09,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 17:20:09,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2023-12-02 17:20:09,171 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 8 [2023-12-02 17:20:09,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:20:09,172 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2023-12-02 17:20:09,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:20:09,172 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2023-12-02 17:20:09,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 17:20:09,173 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:20:09,173 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:20:09,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 17:20:09,174 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:20:09,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:20:09,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1778615702, now seen corresponding path program 1 times [2023-12-02 17:20:09,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:20:09,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930820717] [2023-12-02 17:20:09,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:20:09,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:20:09,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:20:09,261 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 17:20:09,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:20:09,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930820717] [2023-12-02 17:20:09,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930820717] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:20:09,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950512117] [2023-12-02 17:20:09,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:20:09,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:20:09,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:20:09,264 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:20:09,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 17:20:09,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:20:09,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 17:20:09,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:20:09,379 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 17:20:09,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:20:09,399 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 17:20:09,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950512117] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:20:09,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [723810676] [2023-12-02 17:20:09,420 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 17:20:09,420 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:20:09,423 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:20:09,427 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:20:09,427 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:20:09,750 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:20:09,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [723810676] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:20:09,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:20:09,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3] total 8 [2023-12-02 17:20:09,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140334356] [2023-12-02 17:20:09,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:20:09,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:20:09,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:20:09,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:20:09,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2023-12-02 17:20:09,805 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:20:09,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:20:09,861 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2023-12-02 17:20:09,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 17:20:09,861 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-12-02 17:20:09,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:20:09,862 INFO L225 Difference]: With dead ends: 43 [2023-12-02 17:20:09,862 INFO L226 Difference]: Without dead ends: 23 [2023-12-02 17:20:09,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2023-12-02 17:20:09,864 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:20:09,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 29 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:20:09,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-02 17:20:09,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2023-12-02 17:20:09,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 17:20:09,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2023-12-02 17:20:09,870 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 9 [2023-12-02 17:20:09,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:20:09,871 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2023-12-02 17:20:09,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:20:09,871 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2023-12-02 17:20:09,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 17:20:09,872 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:20:09,872 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:20:09,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 17:20:10,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-12-02 17:20:10,077 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:20:10,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:20:10,077 INFO L85 PathProgramCache]: Analyzing trace with hash 523252138, now seen corresponding path program 1 times [2023-12-02 17:20:10,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:20:10,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865624700] [2023-12-02 17:20:10,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:20:10,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:20:10,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:20:10,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 17:20:10,161 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:20:10,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865624700] [2023-12-02 17:20:10,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865624700] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:20:10,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078733863] [2023-12-02 17:20:10,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:20:10,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:20:10,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:20:10,163 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:20:10,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 17:20:10,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:20:10,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 17:20:10,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:20:10,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 17:20:10,248 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:20:10,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078733863] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:20:10,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:20:10,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-12-02 17:20:10,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126208926] [2023-12-02 17:20:10,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:20:10,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:20:10,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:20:10,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:20:10,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:20:10,250 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:20:10,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:20:10,287 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2023-12-02 17:20:10,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:20:10,287 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-12-02 17:20:10,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:20:10,288 INFO L225 Difference]: With dead ends: 39 [2023-12-02 17:20:10,288 INFO L226 Difference]: Without dead ends: 24 [2023-12-02 17:20:10,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:20:10,290 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 5 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:20:10,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 22 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:20:10,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-12-02 17:20:10,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2023-12-02 17:20:10,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 17:20:10,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2023-12-02 17:20:10,296 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 15 [2023-12-02 17:20:10,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:20:10,296 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2023-12-02 17:20:10,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:20:10,297 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2023-12-02 17:20:10,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 17:20:10,297 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:20:10,297 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:20:10,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 17:20:10,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:20:10,503 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:20:10,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:20:10,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1766431364, now seen corresponding path program 1 times [2023-12-02 17:20:10,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:20:10,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371184425] [2023-12-02 17:20:10,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:20:10,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:20:10,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:20:10,574 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 17:20:10,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:20:10,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371184425] [2023-12-02 17:20:10,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371184425] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:20:10,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317059385] [2023-12-02 17:20:10,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:20:10,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:20:10,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:20:10,577 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:20:10,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 17:20:10,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:20:10,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 17:20:10,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:20:10,668 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 17:20:10,668 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:20:10,684 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 17:20:10,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317059385] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:20:10,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1163585064] [2023-12-02 17:20:10,688 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-12-02 17:20:10,688 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:20:10,688 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:20:10,688 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:20:10,688 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:20:11,084 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:20:11,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1163585064] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:20:11,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:20:11,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3, 3] total 12 [2023-12-02 17:20:11,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324605125] [2023-12-02 17:20:11,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:20:11,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 17:20:11,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:20:11,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 17:20:11,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2023-12-02 17:20:11,489 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:20:11,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:20:11,929 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2023-12-02 17:20:11,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 17:20:11,929 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-12-02 17:20:11,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:20:11,930 INFO L225 Difference]: With dead ends: 41 [2023-12-02 17:20:11,930 INFO L226 Difference]: Without dead ends: 27 [2023-12-02 17:20:11,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=103, Invalid=137, Unknown=0, NotChecked=0, Total=240 [2023-12-02 17:20:11,932 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 6 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:20:11,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 37 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:20:11,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-12-02 17:20:11,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2023-12-02 17:20:11,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 17:20:11,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2023-12-02 17:20:11,940 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 16 [2023-12-02 17:20:11,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:20:11,940 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2023-12-02 17:20:11,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:20:11,941 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2023-12-02 17:20:11,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 17:20:11,941 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:20:11,941 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:20:11,946 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 17:20:12,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:20:12,142 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:20:12,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:20:12,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1666995883, now seen corresponding path program 1 times [2023-12-02 17:20:12,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:20:12,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867628709] [2023-12-02 17:20:12,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:20:12,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:20:12,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:20:12,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 17:20:12,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:20:12,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867628709] [2023-12-02 17:20:12,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867628709] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:20:12,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367897056] [2023-12-02 17:20:12,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:20:12,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:20:12,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:20:12,219 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:20:12,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 17:20:12,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:20:12,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 17:20:12,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:20:12,314 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 17:20:12,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:20:12,329 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 17:20:12,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367897056] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:20:12,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [783144652] [2023-12-02 17:20:12,332 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 17:20:12,332 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:20:12,333 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:20:12,333 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:20:12,333 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:20:13,238 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 109 for LOIs [2023-12-02 17:20:13,314 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:20:14,115 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_insert_~size#1_25| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_insert_~set#1.base_25| Int) (|v_ULTIMATE.start_main_#t~ret15#1_32| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_24| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_elem_exists_~size#1_24| Int) (|v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_insert_#in~value#1_24| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_21| Int) (|v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_1| Int) (|v_#memory_int_63| (Array Int (Array Int Int))) (|v_ULTIMATE.start_insert_#in~set#1.offset_24| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_elem_exists_~value#1_24| Int) (|v_ULTIMATE.start_insert_~value#1_25| Int) (|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~n~0#1_52| Int) (|v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_#t~mem14#1_34| Int) (|v_ULTIMATE.start_insert_~set#1.offset_25| Int) (|v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_insert_#in~size#1_24| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_21| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_31| Int) (|v_ULTIMATE.start_insert_#res#1_23| Int)) (let ((.cse4 (= |v_ULTIMATE.start_elem_exists_~i~0#1_31| 0)) (.cse5 (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_1| 0))) (let ((.cse2 (and .cse4 .cse5 (<= |v_ULTIMATE.start_elem_exists_~size#1_24| 0))) (.cse3 (<= 1 |v_ULTIMATE.start_elem_exists_~size#1_24|))) (and (let ((.cse0 (let ((.cse1 (select |c_#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_1|))) (= (select .cse1 (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_1| 4)) (select .cse1 |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_1|))))) (or (and .cse0 (= |c___VERIFIER_assert_#in~cond| 0)) (and (not .cse0) (= |c___VERIFIER_assert_#in~cond| 1)))) (<= 0 (+ |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_1| 2147483648)) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_1|) (or .cse2 (and .cse3 .cse4 .cse5 (= (select (select |v_#memory_int_63| |v_ULTIMATE.start_elem_exists_~set#1.base_21|) |v_ULTIMATE.start_elem_exists_~set#1.offset_21|) |v_ULTIMATE.start_elem_exists_~value#1_24|))) (or (and (= |v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_1| |v_ULTIMATE.start_insert_#in~value#1_24|) (= |v_ULTIMATE.start_insert_~value#1_25| |v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_1|) (= |v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_1| |v_ULTIMATE.start_insert_~size#1_25|) (= |v_#memory_int_63| |c_#memory_int|) (= |v_ULTIMATE.start_insert_#in~set#1.base_24| |v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_1|) (= |v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_1| |v_ULTIMATE.start_insert_~set#1.offset_25|) (= |v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_1| |v_ULTIMATE.start_insert_#in~size#1_24|) (= |v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_1| |v_ULTIMATE.start_insert_~set#1.base_25|) (= |v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_1| |v_ULTIMATE.start_insert_#in~set#1.offset_24|) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_1| |v_ULTIMATE.start_insert_#res#1_23|) (= |v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_1| |v_ULTIMATE.start_main_#t~ret15#1_32|) (not .cse5) (= |v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_1| |v_ULTIMATE.start_main_#t~mem14#1_34|) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_1| |v_ULTIMATE.start_main_~n~0#1_52|)) (and (<= 0 (+ |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_1| 2147483648)) (= (store |v_#memory_int_63| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_1| (store (select |v_#memory_int_63| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_1|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_1| (* |v_ULTIMATE.start_main_~n~0#1_52| 4)) (select (select |v_#memory_int_63| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_1|) (+ (- 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_1| (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_1| 4))))) |c_#memory_int|) (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_1| 2147483647) .cse5 (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_1| (+ |v_ULTIMATE.start_main_~n~0#1_52| 1)) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_1| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_1|))) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_1|) (or .cse2 (and .cse3 .cse4 .cse5)) (<= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_1| 2147483647))))) is different from true [2023-12-02 17:20:14,307 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '774#(and (exists ((|v_#memory_int_63| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_elem_exists_~value#1_24| Int) (|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~n~0#1_52| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_elem_exists_~size#1_24| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_21| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_21| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_31| Int)) (and (= |v_ULTIMATE.start_elem_exists_~i~0#1_31| 0) (= |#memory_int| (store |v_#memory_int_63| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_1| (store (select |v_#memory_int_63| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_1|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_1| (* |v_ULTIMATE.start_main_~n~0#1_52| 4)) (select (select |v_#memory_int_63| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_1|) (+ (- 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_1| (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_1| 4)))))) (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_1| 2147483647) (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_1| 0) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_1|) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_1|) |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_1|) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_1|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_1| 4))) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_1| (+ |v_ULTIMATE.start_main_~n~0#1_52| 1)) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_1| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_1|) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_1|) (or (< |v_ULTIMATE.start_elem_exists_~size#1_24| 1) (= (select (select |v_#memory_int_63| |v_ULTIMATE.start_elem_exists_~set#1.base_21|) |v_ULTIMATE.start_elem_exists_~set#1.offset_21|) |v_ULTIMATE.start_elem_exists_~value#1_24|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 17:20:14,308 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:20:14,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:20:14,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-12-02 17:20:14,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023537480] [2023-12-02 17:20:14,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:20:14,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 17:20:14,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:20:14,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 17:20:14,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=259, Unknown=10, NotChecked=34, Total=380 [2023-12-02 17:20:14,310 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:20:14,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:20:14,366 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2023-12-02 17:20:14,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 17:20:14,367 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-12-02 17:20:14,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:20:14,367 INFO L225 Difference]: With dead ends: 66 [2023-12-02 17:20:14,367 INFO L226 Difference]: Without dead ends: 44 [2023-12-02 17:20:14,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=77, Invalid=259, Unknown=10, NotChecked=34, Total=380 [2023-12-02 17:20:14,369 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 36 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:20:14,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 24 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:20:14,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-12-02 17:20:14,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 28. [2023-12-02 17:20:14,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 17:20:14,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2023-12-02 17:20:14,377 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 20 [2023-12-02 17:20:14,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:20:14,377 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2023-12-02 17:20:14,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:20:14,377 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2023-12-02 17:20:14,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 17:20:14,378 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:20:14,378 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:20:14,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 17:20:14,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:20:14,580 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:20:14,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:20:14,581 INFO L85 PathProgramCache]: Analyzing trace with hash -964089174, now seen corresponding path program 2 times [2023-12-02 17:20:14,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:20:14,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835078682] [2023-12-02 17:20:14,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:20:14,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:20:14,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:20:14,656 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 17:20:14,656 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:20:14,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835078682] [2023-12-02 17:20:14,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835078682] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:20:14,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270425534] [2023-12-02 17:20:14,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:20:14,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:20:14,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:20:14,659 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:20:14,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 17:20:14,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 17:20:14,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:20:14,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 17:20:14,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:20:14,753 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 17:20:14,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:20:14,770 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 17:20:14,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270425534] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:20:14,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [258915174] [2023-12-02 17:20:14,773 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 17:20:14,773 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:20:14,773 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:20:14,773 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:20:14,774 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:20:15,541 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 109 for LOIs [2023-12-02 17:20:15,609 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:20:16,335 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_elem_exists_~value#1_32| Int) (|v_#memory_int_76| (Array Int (Array Int Int))) (|v_ULTIMATE.start_insert_#in~set#1.offset_30| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_insert_~value#1_31| Int) (|v_ULTIMATE.start_main_#t~mem14#1_40| Int) (|v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_29| Int) (|v_ULTIMATE.start_insert_#in~size#1_30| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_#t~ret15#1_38| Int) (|v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_insert_~set#1.offset_31| Int) (|v_ULTIMATE.start_insert_~set#1.base_31| Int) (|v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_insert_~size#1_31| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_39| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~n~0#1_58| Int) (|v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_29| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_30| Int) (|v_ULTIMATE.start_elem_exists_~size#1_32| Int) (|v_ULTIMATE.start_insert_#res#1_29| Int) (|v_ULTIMATE.start_insert_#in~value#1_30| Int) (|v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_2| Int)) (let ((.cse1 (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_2| 0)) (.cse3 (= |v_ULTIMATE.start_elem_exists_~i~0#1_39| 0))) (let ((.cse0 (and .cse1 .cse3 (<= |v_ULTIMATE.start_elem_exists_~size#1_32| 0))) (.cse2 (<= 1 |v_ULTIMATE.start_elem_exists_~size#1_32|))) (and (or .cse0 (and .cse1 .cse2 .cse3 (= (select (select |v_#memory_int_76| |v_ULTIMATE.start_elem_exists_~set#1.base_29|) |v_ULTIMATE.start_elem_exists_~set#1.offset_29|) |v_ULTIMATE.start_elem_exists_~value#1_32|))) (let ((.cse4 (let ((.cse5 (select |c_#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_2|))) (= (select .cse5 (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_2| 4)) (select .cse5 |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_2|))))) (or (and .cse4 (= |c___VERIFIER_assert_#in~cond| 0)) (and (not .cse4) (= |c___VERIFIER_assert_#in~cond| 1)))) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_2|) (or (and .cse1 (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_2| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_2|) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_2| (+ |v_ULTIMATE.start_main_~n~0#1_58| 1)) (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_2| 2147483647) (<= 0 (+ |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_2| 2147483648)) (= (store |v_#memory_int_76| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_2| (store (select |v_#memory_int_76| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_2|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_2| (* |v_ULTIMATE.start_main_~n~0#1_58| 4)) (select (select |v_#memory_int_76| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_2|) (+ (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_2| 4) (- 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_2|)))) |c_#memory_int|)) (and (= |v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_2| |v_ULTIMATE.start_main_#t~mem14#1_40|) (not .cse1) (= |v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_2| |v_ULTIMATE.start_insert_#in~set#1.offset_30|) (= |v_ULTIMATE.start_insert_#in~set#1.base_30| |v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_2|) (= |v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_2| |v_ULTIMATE.start_insert_~set#1.base_31|) (= |v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_2| |v_ULTIMATE.start_main_#t~ret15#1_38|) (= |v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_2| |v_ULTIMATE.start_insert_~set#1.offset_31|) (= |v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_2| |v_ULTIMATE.start_insert_#in~value#1_30|) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_2| |v_ULTIMATE.start_insert_#res#1_29|) (= |v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_2| |v_ULTIMATE.start_insert_~size#1_31|) (= |v_#memory_int_76| |c_#memory_int|) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_2| |v_ULTIMATE.start_main_~n~0#1_58|) (= |v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_2| |v_ULTIMATE.start_insert_#in~size#1_30|) (= |v_ULTIMATE.start_insert_~value#1_31| |v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_2|))) (<= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_2| 2147483647) (or .cse0 (and .cse1 .cse2 .cse3)) (<= 0 (+ |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_2| 2147483648)) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_2|))))) is different from true [2023-12-02 17:20:16,498 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1081#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_elem_exists_~value#1_32| Int) (|v_#memory_int_76| (Array Int (Array Int Int))) (|v_ULTIMATE.start_elem_exists_~i~0#1_39| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~n~0#1_58| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_29| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_29| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_elem_exists_~size#1_32| Int)) (and (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_2| 0) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_2|) (= (store |v_#memory_int_76| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_2| (store (select |v_#memory_int_76| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_2|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_2| (* |v_ULTIMATE.start_main_~n~0#1_58| 4)) (select (select |v_#memory_int_76| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_2|) (+ (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_2| 4) (- 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_2|)))) |#memory_int|) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_2| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_2|) (= |v_ULTIMATE.start_elem_exists_~i~0#1_39| 0) (or (= (select (select |v_#memory_int_76| |v_ULTIMATE.start_elem_exists_~set#1.base_29|) |v_ULTIMATE.start_elem_exists_~set#1.offset_29|) |v_ULTIMATE.start_elem_exists_~value#1_32|) (< |v_ULTIMATE.start_elem_exists_~size#1_32| 1)) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_2| (+ |v_ULTIMATE.start_main_~n~0#1_58| 1)) (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_2| 2147483647) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_2|) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_2|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_2| 4)) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_2|) |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_2|)))))' at error location [2023-12-02 17:20:16,498 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:20:16,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:20:16,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-12-02 17:20:16,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724213646] [2023-12-02 17:20:16,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:20:16,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 17:20:16,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:20:16,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 17:20:16,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=284, Unknown=10, NotChecked=34, Total=380 [2023-12-02 17:20:16,500 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:20:16,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:20:16,551 INFO L93 Difference]: Finished difference Result 66 states and 89 transitions. [2023-12-02 17:20:16,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 17:20:16,552 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-12-02 17:20:16,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:20:16,553 INFO L225 Difference]: With dead ends: 66 [2023-12-02 17:20:16,553 INFO L226 Difference]: Without dead ends: 47 [2023-12-02 17:20:16,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=284, Unknown=10, NotChecked=34, Total=380 [2023-12-02 17:20:16,554 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:20:16,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 35 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:20:16,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-12-02 17:20:16,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2023-12-02 17:20:16,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 17:20:16,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2023-12-02 17:20:16,565 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 23 [2023-12-02 17:20:16,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:20:16,565 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2023-12-02 17:20:16,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:20:16,565 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2023-12-02 17:20:16,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 17:20:16,566 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:20:16,567 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:20:16,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 17:20:16,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:20:16,767 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:20:16,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:20:16,768 INFO L85 PathProgramCache]: Analyzing trace with hash 2101592878, now seen corresponding path program 3 times [2023-12-02 17:20:16,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:20:16,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904711495] [2023-12-02 17:20:16,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:20:16,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:20:16,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:20:16,912 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 17:20:16,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:20:16,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904711495] [2023-12-02 17:20:16,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904711495] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:20:16,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615099760] [2023-12-02 17:20:16,913 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:20:16,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:20:16,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:20:16,914 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:20:16,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 17:20:17,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:20:17,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:20:17,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 17:20:17,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:20:17,049 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 17:20:17,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:20:17,096 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 17:20:17,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615099760] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:20:17,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1883261818] [2023-12-02 17:20:17,099 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 17:20:17,099 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:20:17,099 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:20:17,099 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:20:17,099 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:20:17,635 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 109 for LOIs [2023-12-02 17:20:17,718 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:20:18,362 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_#memory_int_98| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_insert_~value#1_39| Int) (|v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_#t~mem14#1_48| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~n~0#1_66| Int) (|v_ULTIMATE.start_insert_#in~set#1.offset_38| Int) (|v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_insert_~set#1.offset_39| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_elem_exists_~size#1_44| Int) (|v_ULTIMATE.start_insert_#in~size#1_38| Int) (|v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_41| Int) (|v_ULTIMATE.start_insert_#res#1_37| Int) (|v_ULTIMATE.start_elem_exists_~value#1_44| Int) (|v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_insert_#in~value#1_38| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_insert_~set#1.base_39| Int) (|v_ULTIMATE.start_insert_~size#1_39| Int) (|v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_#t~ret15#1_46| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_51| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_41| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_38| Int) (|v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_3| Int)) (let ((.cse1 (= |v_ULTIMATE.start_elem_exists_~i~0#1_51| 0)) (.cse3 (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_3| 0))) (let ((.cse2 (<= 1 |v_ULTIMATE.start_elem_exists_~size#1_44|)) (.cse0 (and .cse1 .cse3 (<= |v_ULTIMATE.start_elem_exists_~size#1_44| 0)))) (and (or .cse0 (and .cse1 .cse2 .cse3 (= |v_ULTIMATE.start_elem_exists_~value#1_44| (select (select |v_#memory_int_98| |v_ULTIMATE.start_elem_exists_~set#1.base_41|) |v_ULTIMATE.start_elem_exists_~set#1.offset_41|)))) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_3|) (<= 0 (+ |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_3| 2147483648)) (or (and (<= 0 (+ |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_3| 2147483648)) (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_3| 2147483647) .cse3 (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_3| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_3|) (= (store |v_#memory_int_98| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_3| (store (select |v_#memory_int_98| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_3|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_3| (* |v_ULTIMATE.start_main_~n~0#1_66| 4)) (select (select |v_#memory_int_98| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_3|) (+ (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_3| 4) (- 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_3|)))) |c_#memory_int|) (= (+ |v_ULTIMATE.start_main_~n~0#1_66| 1) |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_3|)) (and (= |v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_3| |v_ULTIMATE.start_insert_#in~value#1_38|) (= |v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_3| |v_ULTIMATE.start_main_#t~ret15#1_46|) (= |v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_3| |v_ULTIMATE.start_insert_~set#1.offset_39|) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_3| |v_ULTIMATE.start_main_~n~0#1_66|) (= |v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_3| |v_ULTIMATE.start_main_#t~mem14#1_48|) (= |v_ULTIMATE.start_insert_~value#1_39| |v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_3|) (= |v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_3| |v_ULTIMATE.start_insert_#in~size#1_38|) (= |v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_3| |v_ULTIMATE.start_insert_~set#1.base_39|) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_3| |v_ULTIMATE.start_insert_#res#1_37|) (= |v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_3| |v_ULTIMATE.start_insert_#in~set#1.offset_38|) (= |v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_3| |v_ULTIMATE.start_insert_~size#1_39|) (= |v_#memory_int_98| |c_#memory_int|) (= |v_ULTIMATE.start_insert_#in~set#1.base_38| |v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_3|) (not .cse3))) (<= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_3| 2147483647) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_3|) (or (and .cse1 .cse2 .cse3) .cse0) (let ((.cse4 (let ((.cse5 (select |c_#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_3|))) (= (select .cse5 |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_3|) (select .cse5 (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_3| 4)))))) (or (and (= |c___VERIFIER_assert_#in~cond| 1) (not .cse4)) (and .cse4 (= |c___VERIFIER_assert_#in~cond| 0)))))))) is different from true [2023-12-02 17:20:18,521 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1473#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_elem_exists_~value#1_44| Int) (|v_#memory_int_98| (Array Int (Array Int Int))) (|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~n~0#1_66| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_elem_exists_~size#1_44| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_51| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_41| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_41| Int)) (and (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_3|) (= |v_ULTIMATE.start_elem_exists_~i~0#1_51| 0) (= |#memory_int| (store |v_#memory_int_98| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_3| (store (select |v_#memory_int_98| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_3|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_3| (* |v_ULTIMATE.start_main_~n~0#1_66| 4)) (select (select |v_#memory_int_98| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_3|) (+ (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_3| 4) (- 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_3|))))) (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_3| 2147483647) (or (< |v_ULTIMATE.start_elem_exists_~size#1_44| 1) (= |v_ULTIMATE.start_elem_exists_~value#1_44| (select (select |v_#memory_int_98| |v_ULTIMATE.start_elem_exists_~set#1.base_41|) |v_ULTIMATE.start_elem_exists_~set#1.offset_41|))) (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_3| 0) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_3|) |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_3|) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_3|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_3| 4))) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_3|) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_3| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_3|) (= (+ |v_ULTIMATE.start_main_~n~0#1_66| 1) |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_3|))))' at error location [2023-12-02 17:20:18,522 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:20:18,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:20:18,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-12-02 17:20:18,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426635093] [2023-12-02 17:20:18,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:20:18,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 17:20:18,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:20:18,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 17:20:18,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=430, Unknown=10, NotChecked=46, Total=650 [2023-12-02 17:20:18,524 INFO L87 Difference]: Start difference. First operand 45 states and 58 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:20:18,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:20:18,627 INFO L93 Difference]: Finished difference Result 130 states and 181 transitions. [2023-12-02 17:20:18,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 17:20:18,628 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-12-02 17:20:18,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:20:18,629 INFO L225 Difference]: With dead ends: 130 [2023-12-02 17:20:18,629 INFO L226 Difference]: Without dead ends: 91 [2023-12-02 17:20:18,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=164, Invalid=430, Unknown=10, NotChecked=46, Total=650 [2023-12-02 17:20:18,631 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 65 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:20:18,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 35 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:20:18,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-12-02 17:20:18,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 51. [2023-12-02 17:20:18,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 48 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 17:20:18,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2023-12-02 17:20:18,645 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 32 [2023-12-02 17:20:18,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:20:18,645 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2023-12-02 17:20:18,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:20:18,645 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2023-12-02 17:20:18,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-02 17:20:18,646 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:20:18,646 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:20:18,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 17:20:18,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:20:18,847 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:20:18,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:20:18,847 INFO L85 PathProgramCache]: Analyzing trace with hash -987236594, now seen corresponding path program 4 times [2023-12-02 17:20:18,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:20:18,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10982617] [2023-12-02 17:20:18,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:20:18,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:20:18,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:20:19,091 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 17:20:19,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:20:19,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10982617] [2023-12-02 17:20:19,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10982617] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:20:19,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933610394] [2023-12-02 17:20:19,092 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:20:19,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:20:19,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:20:19,093 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:20:19,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 17:20:19,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:20:19,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 17:20:19,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:20:19,246 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 17:20:19,246 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:20:19,429 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 17:20:19,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933610394] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:20:19,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1846092499] [2023-12-02 17:20:19,431 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 17:20:19,432 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:20:19,432 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:20:19,432 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:20:19,432 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:20:20,012 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 109 for LOIs [2023-12-02 17:20:20,095 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:20:20,829 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_elem_exists_~value#1_56| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_insert_~size#1_47| Int) (|v_ULTIMATE.start_insert_~set#1.base_47| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_#t~ret15#1_54| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_46| Int) (|v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_63| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_insert_#in~value#1_46| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_53| Int) (|v_ULTIMATE.start_insert_#in~set#1.offset_46| Int) (|v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_4| Int) (|v_#memory_int_126| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~n~0#1_74| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_insert_~value#1_47| Int) (|v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_#t~mem14#1_56| Int) (|v_ULTIMATE.start_insert_~set#1.offset_47| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_insert_#in~size#1_46| Int) (|v_ULTIMATE.start_elem_exists_~size#1_56| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_53| Int) (|v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_insert_#res#1_45| Int)) (let ((.cse2 (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_4| 0)) (.cse4 (= |v_ULTIMATE.start_elem_exists_~i~0#1_63| 0))) (let ((.cse3 (<= 1 |v_ULTIMATE.start_elem_exists_~size#1_56|)) (.cse5 (and (<= |v_ULTIMATE.start_elem_exists_~size#1_56| 0) .cse2 .cse4))) (and (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_4|) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_4|) (let ((.cse0 (let ((.cse1 (select |c_#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_4|))) (= (select .cse1 (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_4| 4)) (select .cse1 |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_4|))))) (or (and .cse0 (= |c___VERIFIER_assert_#in~cond| 0)) (and (not .cse0) (= |c___VERIFIER_assert_#in~cond| 1)))) (or (and (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_4| (+ |v_ULTIMATE.start_main_~n~0#1_74| 1)) .cse2 (<= 0 (+ |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_4| 2147483648)) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_4| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_4|) (= |c_#memory_int| (store |v_#memory_int_126| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_4| (store (select |v_#memory_int_126| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_4|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_4| (* |v_ULTIMATE.start_main_~n~0#1_74| 4)) (select (select |v_#memory_int_126| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_4|) (+ (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_4| 4) (- 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_4|))))) (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_4| 2147483647)) (and (= |v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_4| |v_ULTIMATE.start_insert_~set#1.base_47|) (= |v_ULTIMATE.start_insert_#in~set#1.base_46| |v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_4|) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_4| |v_ULTIMATE.start_main_~n~0#1_74|) (= |c_#memory_int| |v_#memory_int_126|) (= |v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_4| |v_ULTIMATE.start_insert_#in~set#1.offset_46|) (= |v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_4| |v_ULTIMATE.start_main_#t~ret15#1_54|) (= |v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_4| |v_ULTIMATE.start_insert_#in~value#1_46|) (= |v_ULTIMATE.start_insert_~value#1_47| |v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_4|) (not .cse2) (= |v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_4| |v_ULTIMATE.start_insert_~size#1_47|) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_4| |v_ULTIMATE.start_insert_#res#1_45|) (= |v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_4| |v_ULTIMATE.start_insert_#in~size#1_46|) (= |v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_4| |v_ULTIMATE.start_insert_~set#1.offset_47|) (= |v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_4| |v_ULTIMATE.start_main_#t~mem14#1_56|))) (or (and .cse2 .cse3 .cse4) .cse5) (<= 0 (+ |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_4| 2147483648)) (<= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_4| 2147483647) (or (and (= (select (select |v_#memory_int_126| |v_ULTIMATE.start_elem_exists_~set#1.base_53|) |v_ULTIMATE.start_elem_exists_~set#1.offset_53|) |v_ULTIMATE.start_elem_exists_~value#1_56|) .cse2 .cse3 .cse4) .cse5))))) is different from true [2023-12-02 17:20:20,987 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2038#(and (exists ((|v_ULTIMATE.start_elem_exists_~value#1_56| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_4| Int) (|v_#memory_int_126| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~n~0#1_74| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_63| Int) (|v_ULTIMATE.start_elem_exists_~size#1_56| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_53| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_53| Int)) (and (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_4|) (or (< |v_ULTIMATE.start_elem_exists_~size#1_56| 1) (= (select (select |v_#memory_int_126| |v_ULTIMATE.start_elem_exists_~set#1.base_53|) |v_ULTIMATE.start_elem_exists_~set#1.offset_53|) |v_ULTIMATE.start_elem_exists_~value#1_56|)) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_4|) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_4| (+ |v_ULTIMATE.start_main_~n~0#1_74| 1)) (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_4| 0) (= |#memory_int| (store |v_#memory_int_126| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_4| (store (select |v_#memory_int_126| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_4|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_4| (* |v_ULTIMATE.start_main_~n~0#1_74| 4)) (select (select |v_#memory_int_126| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_4|) (+ (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_4| 4) (- 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_4|))))) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_4| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_4|) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_4|) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_4|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_4| 4))) (= |v_ULTIMATE.start_elem_exists_~i~0#1_63| 0) (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_4| 2147483647))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 17:20:20,987 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:20:20,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:20:20,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-12-02 17:20:20,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88547077] [2023-12-02 17:20:20,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:20:20,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-02 17:20:20,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:20:20,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-02 17:20:20,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=446, Invalid=880, Unknown=10, NotChecked=70, Total=1406 [2023-12-02 17:20:20,989 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:20:21,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:20:21,202 INFO L93 Difference]: Finished difference Result 190 states and 271 transitions. [2023-12-02 17:20:21,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 17:20:21,202 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-12-02 17:20:21,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:20:21,204 INFO L225 Difference]: With dead ends: 190 [2023-12-02 17:20:21,204 INFO L226 Difference]: Without dead ends: 151 [2023-12-02 17:20:21,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=446, Invalid=880, Unknown=10, NotChecked=70, Total=1406 [2023-12-02 17:20:21,206 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 193 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:20:21,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 24 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:20:21,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-12-02 17:20:21,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 63. [2023-12-02 17:20:21,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 60 states have (on average 1.2333333333333334) internal successors, (74), 60 states have internal predecessors, (74), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 17:20:21,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2023-12-02 17:20:21,225 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 38 [2023-12-02 17:20:21,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:20:21,226 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2023-12-02 17:20:21,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:20:21,226 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2023-12-02 17:20:21,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-02 17:20:21,228 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:20:21,228 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:20:21,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-02 17:20:21,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:20:21,429 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:20:21,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:20:21,429 INFO L85 PathProgramCache]: Analyzing trace with hash 404956878, now seen corresponding path program 5 times [2023-12-02 17:20:21,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:20:21,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482527020] [2023-12-02 17:20:21,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:20:21,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:20:21,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:20:22,097 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 17:20:22,098 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:20:22,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482527020] [2023-12-02 17:20:22,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482527020] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:20:22,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479152373] [2023-12-02 17:20:22,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:20:22,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:20:22,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:20:22,100 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:20:22,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 17:20:22,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 17:20:22,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:20:22,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 17:20:22,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:20:22,313 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-12-02 17:20:22,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:20:22,389 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-12-02 17:20:22,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479152373] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:20:22,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1705876106] [2023-12-02 17:20:22,391 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 17:20:22,392 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:20:22,392 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:20:22,392 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:20:22,392 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:20:22,945 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 109 for LOIs [2023-12-02 17:20:23,014 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:20:23,843 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~n~0#1_82| Int) (|v_ULTIMATE.start_insert_#in~set#1.offset_54| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_insert_~value#1_55| Int) (|v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_#t~mem14#1_64| Int) (|v_ULTIMATE.start_insert_#in~size#1_54| Int) (|v_ULTIMATE.start_elem_exists_~size#1_68| Int) (|v_#memory_int_144| (Array Int (Array Int Int))) (|v_ULTIMATE.start_elem_exists_~set#1.offset_65| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_insert_~set#1.offset_55| Int) (|v_ULTIMATE.start_insert_#res#1_53| Int) (|v_ULTIMATE.start_insert_~set#1.base_55| Int) (|v_ULTIMATE.start_insert_~size#1_55| Int) (|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_elem_exists_~value#1_68| Int) (|v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_54| Int) (|v_ULTIMATE.start_main_#t~ret15#1_62| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_65| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_75| Int) (|v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_insert_#in~value#1_54| Int)) (let ((.cse0 (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_5| 0)) (.cse5 (= |v_ULTIMATE.start_elem_exists_~i~0#1_75| 0))) (let ((.cse4 (<= 1 |v_ULTIMATE.start_elem_exists_~size#1_68|)) (.cse3 (and .cse0 (<= |v_ULTIMATE.start_elem_exists_~size#1_68| 0) .cse5))) (and (<= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_5| 2147483647) (or (and (= |v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_5| |v_ULTIMATE.start_main_#t~mem14#1_64|) (= |v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_5| |v_ULTIMATE.start_main_#t~ret15#1_62|) (= |v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_5| |v_ULTIMATE.start_insert_#in~size#1_54|) (= |c_#memory_int| |v_#memory_int_144|) (= |v_ULTIMATE.start_insert_#in~set#1.base_54| |v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_5|) (= |v_ULTIMATE.start_insert_~value#1_55| |v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_5|) (= |v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_5| |v_ULTIMATE.start_insert_~set#1.offset_55|) (= |v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_5| |v_ULTIMATE.start_insert_~size#1_55|) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_5| |v_ULTIMATE.start_insert_#res#1_53|) (= |v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_5| |v_ULTIMATE.start_insert_#in~value#1_54|) (not .cse0) (= |v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_5| |v_ULTIMATE.start_insert_#in~set#1.offset_54|) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_5| |v_ULTIMATE.start_main_~n~0#1_82|) (= |v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_5| |v_ULTIMATE.start_insert_~set#1.base_55|)) (and (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_5| 2147483647) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_5| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_5|) (<= 0 (+ |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_5| 2147483648)) .cse0 (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_5| (+ |v_ULTIMATE.start_main_~n~0#1_82| 1)) (= (store |v_#memory_int_144| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_5| (store (select |v_#memory_int_144| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_5|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_5| (* |v_ULTIMATE.start_main_~n~0#1_82| 4)) (select (select |v_#memory_int_144| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_5|) (+ (- 4) (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_5| 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_5|)))) |c_#memory_int|))) (let ((.cse1 (let ((.cse2 (select |c_#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_5|))) (= (select .cse2 (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_5| 4)) (select .cse2 |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_5|))))) (or (and (not .cse1) (= |c___VERIFIER_assert_#in~cond| 1)) (and (= |c___VERIFIER_assert_#in~cond| 0) .cse1))) (<= 0 (+ |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_5| 2147483648)) (or .cse3 (and .cse0 .cse4 .cse5)) (or (and .cse0 .cse4 .cse5 (= (select (select |v_#memory_int_144| |v_ULTIMATE.start_elem_exists_~set#1.base_65|) |v_ULTIMATE.start_elem_exists_~set#1.offset_65|) |v_ULTIMATE.start_elem_exists_~value#1_68|)) .cse3) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_5|) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_5|))))) is different from true [2023-12-02 17:20:24,070 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2817#(and (exists ((|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_elem_exists_~value#1_68| Int) (|v_ULTIMATE.start_main_~n~0#1_82| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_elem_exists_~size#1_68| Int) (|v_#memory_int_144| (Array Int (Array Int Int))) (|v_ULTIMATE.start_elem_exists_~set#1.offset_65| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_65| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_75| Int)) (and (or (< |v_ULTIMATE.start_elem_exists_~size#1_68| 1) (= (select (select |v_#memory_int_144| |v_ULTIMATE.start_elem_exists_~set#1.base_65|) |v_ULTIMATE.start_elem_exists_~set#1.offset_65|) |v_ULTIMATE.start_elem_exists_~value#1_68|)) (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_5| 2147483647) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_5| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_5|) (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_5| 0) (= |v_ULTIMATE.start_elem_exists_~i~0#1_75| 0) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_5| (+ |v_ULTIMATE.start_main_~n~0#1_82| 1)) (= (store |v_#memory_int_144| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_5| (store (select |v_#memory_int_144| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_5|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_5| (* |v_ULTIMATE.start_main_~n~0#1_82| 4)) (select (select |v_#memory_int_144| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_5|) (+ (- 4) (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_5| 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_5|)))) |#memory_int|) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_5|) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_5|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_5| 4)) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_5|) |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_5|)) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_5|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 17:20:24,070 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:20:24,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:20:24,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2023-12-02 17:20:24,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8522107] [2023-12-02 17:20:24,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:20:24,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-02 17:20:24,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:20:24,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-02 17:20:24,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=511, Invalid=1645, Unknown=10, NotChecked=90, Total=2256 [2023-12-02 17:20:24,073 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:20:24,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:20:24,554 INFO L93 Difference]: Finished difference Result 245 states and 347 transitions. [2023-12-02 17:20:24,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-12-02 17:20:24,555 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2023-12-02 17:20:24,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:20:24,557 INFO L225 Difference]: With dead ends: 245 [2023-12-02 17:20:24,557 INFO L226 Difference]: Without dead ends: 206 [2023-12-02 17:20:24,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=861, Invalid=2325, Unknown=10, NotChecked=110, Total=3306 [2023-12-02 17:20:24,559 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 556 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:20:24,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [579 Valid, 55 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:20:24,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-12-02 17:20:24,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 112. [2023-12-02 17:20:24,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 109 states have (on average 1.2935779816513762) internal successors, (141), 109 states have internal predecessors, (141), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 17:20:24,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 143 transitions. [2023-12-02 17:20:24,587 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 143 transitions. Word has length 50 [2023-12-02 17:20:24,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:20:24,587 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 143 transitions. [2023-12-02 17:20:24,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:20:24,587 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 143 transitions. [2023-12-02 17:20:24,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-02 17:20:24,589 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:20:24,589 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:20:24,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 17:20:24,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:20:24,796 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:20:24,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:20:24,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1967788957, now seen corresponding path program 6 times [2023-12-02 17:20:24,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:20:24,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456938008] [2023-12-02 17:20:24,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:20:24,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:20:24,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:20:25,684 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2023-12-02 17:20:25,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:20:25,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456938008] [2023-12-02 17:20:25,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456938008] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:20:25,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729822508] [2023-12-02 17:20:25,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:20:25,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:20:25,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:20:25,686 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:20:25,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 17:20:25,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:20:25,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:20:25,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 17:20:25,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:20:25,920 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2023-12-02 17:20:25,920 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:20:26,602 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2023-12-02 17:20:26,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729822508] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:20:26,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1096866058] [2023-12-02 17:20:26,604 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 17:20:26,605 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:20:26,605 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:20:26,605 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:20:26,605 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:20:27,178 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 109 for LOIs [2023-12-02 17:20:27,249 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:20:28,028 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_elem_exists_~value#1_92| Int) (|v_ULTIMATE.start_insert_~size#1_69| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_insert_~set#1.base_69| Int) (|v_ULTIMATE.start_main_#t~ret15#1_76| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_68| Int) (|v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_insert_#in~value#1_68| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_89| Int) (|v_ULTIMATE.start_elem_exists_~size#1_92| Int) (|v_ULTIMATE.start_insert_#in~set#1.offset_68| Int) (|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_99| Int) (|v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_main_~n~0#1_96| Int) (|v_ULTIMATE.start_insert_~value#1_69| Int) (|v_ULTIMATE.start_main_#t~mem14#1_78| Int) (|v_ULTIMATE.start_insert_~set#1.offset_69| Int) (|v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_insert_#in~size#1_68| Int) (|v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_89| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_insert_#res#1_67| Int) (|v_#memory_int_197| (Array Int (Array Int Int)))) (let ((.cse2 (= |v_ULTIMATE.start_elem_exists_~i~0#1_99| 0)) (.cse4 (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_6| 0))) (let ((.cse5 (and .cse2 (<= |v_ULTIMATE.start_elem_exists_~size#1_92| 0) .cse4)) (.cse3 (<= 1 |v_ULTIMATE.start_elem_exists_~size#1_92|))) (and (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_6|) (let ((.cse0 (let ((.cse1 (select |c_#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_6|))) (= (select .cse1 |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_6|) (select .cse1 (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_6| 4)))))) (or (and (= |c___VERIFIER_assert_#in~cond| 1) (not .cse0)) (and .cse0 (= |c___VERIFIER_assert_#in~cond| 0)))) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_6|) (<= 0 (+ |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_6| 2147483648)) (or (and .cse2 .cse3 (= |v_ULTIMATE.start_elem_exists_~value#1_92| (select (select |v_#memory_int_197| |v_ULTIMATE.start_elem_exists_~set#1.base_89|) |v_ULTIMATE.start_elem_exists_~set#1.offset_89|)) .cse4) .cse5) (<= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_6| 2147483647) (or .cse5 (and .cse2 .cse3 .cse4)) (or (and (= |v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_6| |v_ULTIMATE.start_insert_~size#1_69|) (= |v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_6| |v_ULTIMATE.start_insert_#in~value#1_68|) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_6| |v_ULTIMATE.start_insert_#res#1_67|) (not .cse4) (= |c_#memory_int| |v_#memory_int_197|) (= |v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_6| |v_ULTIMATE.start_insert_#in~size#1_68|) (= |v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_6| |v_ULTIMATE.start_insert_~set#1.offset_69|) (= |v_ULTIMATE.start_insert_#in~set#1.base_68| |v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_6|) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_6| |v_ULTIMATE.start_main_~n~0#1_96|) (= |v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_6| |v_ULTIMATE.start_main_#t~ret15#1_76|) (= |v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_6| |v_ULTIMATE.start_insert_~set#1.base_69|) (= |v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_6| |v_ULTIMATE.start_insert_#in~set#1.offset_68|) (= |v_ULTIMATE.start_insert_~value#1_69| |v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_6|) (= |v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_6| |v_ULTIMATE.start_main_#t~mem14#1_78|)) (and (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_6| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_6|) (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_6| 2147483647) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_6| (+ |v_ULTIMATE.start_main_~n~0#1_96| 1)) (= (store |v_#memory_int_197| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_6| (store (select |v_#memory_int_197| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_6|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_6| (* |v_ULTIMATE.start_main_~n~0#1_96| 4)) (select (select |v_#memory_int_197| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_6|) (+ (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_6| 4) (- 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_6|)))) |c_#memory_int|) (<= 0 (+ |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_6| 2147483648)) .cse4)))))) is different from true [2023-12-02 17:20:28,262 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3952#(and (exists ((|v_ULTIMATE.start_elem_exists_~size#1_92| Int) (|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_99| Int) (|v_ULTIMATE.start_main_~n~0#1_96| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_elem_exists_~value#1_92| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_89| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_89| Int) (|v_#memory_int_197| (Array Int (Array Int Int)))) (and (= |v_ULTIMATE.start_elem_exists_~i~0#1_99| 0) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_6|) (= |#memory_int| (store |v_#memory_int_197| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_6| (store (select |v_#memory_int_197| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_6|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_6| (* |v_ULTIMATE.start_main_~n~0#1_96| 4)) (select (select |v_#memory_int_197| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_6|) (+ (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_6| 4) (- 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_6|))))) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_6| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_6|) (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_6| 2147483647) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_6|) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_6| (+ |v_ULTIMATE.start_main_~n~0#1_96| 1)) (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_6| 0) (or (= |v_ULTIMATE.start_elem_exists_~value#1_92| (select (select |v_#memory_int_197| |v_ULTIMATE.start_elem_exists_~set#1.base_89|) |v_ULTIMATE.start_elem_exists_~set#1.offset_89|)) (< |v_ULTIMATE.start_elem_exists_~size#1_92| 1)) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_6|) |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_6|) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_6|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_6| 4))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 17:20:28,262 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:20:28,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:20:28,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2023-12-02 17:20:28,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135833878] [2023-12-02 17:20:28,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:20:28,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-12-02 17:20:28,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:20:28,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-12-02 17:20:28,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1551, Invalid=2349, Unknown=10, NotChecked=122, Total=4032 [2023-12-02 17:20:28,267 INFO L87 Difference]: Start difference. First operand 112 states and 143 transitions. Second operand has 51 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 50 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:20:28,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:20:28,839 INFO L93 Difference]: Finished difference Result 416 states and 598 transitions. [2023-12-02 17:20:28,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-12-02 17:20:28,840 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 50 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2023-12-02 17:20:28,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:20:28,843 INFO L225 Difference]: With dead ends: 416 [2023-12-02 17:20:28,843 INFO L226 Difference]: Without dead ends: 329 [2023-12-02 17:20:28,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1551, Invalid=2349, Unknown=10, NotChecked=122, Total=4032 [2023-12-02 17:20:28,846 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 520 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:20:28,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 48 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:20:28,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-12-02 17:20:28,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 137. [2023-12-02 17:20:28,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 134 states have (on average 1.2388059701492538) internal successors, (166), 134 states have internal predecessors, (166), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 17:20:28,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 168 transitions. [2023-12-02 17:20:28,874 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 168 transitions. Word has length 75 [2023-12-02 17:20:28,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:20:28,875 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 168 transitions. [2023-12-02 17:20:28,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 50 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:20:28,875 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 168 transitions. [2023-12-02 17:20:28,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-12-02 17:20:28,877 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:20:28,877 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:20:28,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 17:20:29,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 17:20:29,084 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:20:29,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:20:29,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1903898546, now seen corresponding path program 7 times [2023-12-02 17:20:29,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:20:29,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330152889] [2023-12-02 17:20:29,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:20:29,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:20:29,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:20:31,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1376 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2023-12-02 17:20:31,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:20:31,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330152889] [2023-12-02 17:20:31,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330152889] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:20:31,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262305949] [2023-12-02 17:20:31,230 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:20:31,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:20:31,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:20:31,231 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:20:31,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 17:20:31,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:20:31,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 50 conjunts are in the unsatisfiable core [2023-12-02 17:20:31,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:20:31,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1376 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2023-12-02 17:20:31,593 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:20:33,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1376 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2023-12-02 17:20:33,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262305949] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:20:33,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1597253327] [2023-12-02 17:20:33,950 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 17:20:33,950 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:20:33,950 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:20:33,950 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:20:33,951 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:20:34,449 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 109 for LOIs [2023-12-02 17:20:34,508 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:20:35,393 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_insert_~size#1_83| Int) (|v_ULTIMATE.start_insert_~set#1.base_83| Int) (|v_ULTIMATE.start_insert_#res#1_81| Int) (|v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_insert_#in~size#1_82| Int) (|v_ULTIMATE.start_insert_#in~value#1_82| Int) (|v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_insert_#in~set#1.offset_82| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_insert_~value#1_83| Int) (|v_ULTIMATE.start_elem_exists_~value#1_116| Int) (|v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_#t~ret15#1_90| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_82| Int) (|v_ULTIMATE.start_elem_exists_~size#1_116| Int) (|v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_113| Int) (|v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_123| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_#t~mem14#1_92| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_insert_~set#1.offset_83| Int) (|v_#memory_int_275| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~n~0#1_110| Int) (|v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_113| Int)) (let ((.cse1 (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_7| 0)) (.cse2 (= |v_ULTIMATE.start_elem_exists_~i~0#1_123| 0))) (let ((.cse0 (and .cse1 .cse2 (<= |v_ULTIMATE.start_elem_exists_~size#1_116| 0))) (.cse3 (<= 1 |v_ULTIMATE.start_elem_exists_~size#1_116|))) (and (or .cse0 (and .cse1 .cse2 (= (select (select |v_#memory_int_275| |v_ULTIMATE.start_elem_exists_~set#1.base_113|) |v_ULTIMATE.start_elem_exists_~set#1.offset_113|) |v_ULTIMATE.start_elem_exists_~value#1_116|) .cse3)) (or .cse0 (and .cse1 .cse2 .cse3)) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_7|) (<= 0 (+ |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_7| 2147483648)) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_7|) (<= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_7| 2147483647) (or (and (= |v_ULTIMATE.start_insert_#in~set#1.base_82| |v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_7|) (= |v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_7| |v_ULTIMATE.start_insert_~set#1.base_83|) (= |v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_7| |v_ULTIMATE.start_main_#t~ret15#1_90|) (= |v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_7| |v_ULTIMATE.start_insert_#in~value#1_82|) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_7| |v_ULTIMATE.start_insert_#res#1_81|) (not .cse1) (= |v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_7| |v_ULTIMATE.start_main_#t~mem14#1_92|) (= |v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_7| |v_ULTIMATE.start_insert_~set#1.offset_83|) (= |v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_7| |v_ULTIMATE.start_insert_#in~size#1_82|) (= |v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_7| |v_ULTIMATE.start_insert_#in~set#1.offset_82|) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_7| |v_ULTIMATE.start_main_~n~0#1_110|) (= |v_ULTIMATE.start_insert_~value#1_83| |v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_7|) (= |v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_7| |v_ULTIMATE.start_insert_~size#1_83|) (= |c_#memory_int| |v_#memory_int_275|)) (and .cse1 (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_7| (+ |v_ULTIMATE.start_main_~n~0#1_110| 1)) (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_7| 2147483647) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_7| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_7|) (= (store |v_#memory_int_275| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_7| (store (select |v_#memory_int_275| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_7|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_7| (* |v_ULTIMATE.start_main_~n~0#1_110| 4)) (select (select |v_#memory_int_275| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_7|) (+ (- 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_7| (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_7| 4))))) |c_#memory_int|) (<= 0 (+ |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_7| 2147483648)))) (let ((.cse4 (let ((.cse5 (select |c_#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_7|))) (= (select .cse5 |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_7|) (select .cse5 (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_7| 4)))))) (or (and (= |c___VERIFIER_assert_#in~cond| 0) .cse4) (and (= |c___VERIFIER_assert_#in~cond| 1) (not .cse4)))))))) is different from true [2023-12-02 17:20:35,682 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5617#(and (exists ((|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_elem_exists_~value#1_116| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_elem_exists_~size#1_116| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_113| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_123| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_7| Int) (|v_#memory_int_275| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~n~0#1_110| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_113| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_7| Int)) (and (or (< |v_ULTIMATE.start_elem_exists_~size#1_116| 1) (= (select (select |v_#memory_int_275| |v_ULTIMATE.start_elem_exists_~set#1.base_113|) |v_ULTIMATE.start_elem_exists_~set#1.offset_113|) |v_ULTIMATE.start_elem_exists_~value#1_116|)) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_7|) (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_7| 0) (= |#memory_int| (store |v_#memory_int_275| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_7| (store (select |v_#memory_int_275| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_7|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_7| (* |v_ULTIMATE.start_main_~n~0#1_110| 4)) (select (select |v_#memory_int_275| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_7|) (+ (- 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_7| (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_7| 4)))))) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_7| (+ |v_ULTIMATE.start_main_~n~0#1_110| 1)) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_7|) (= |v_ULTIMATE.start_elem_exists_~i~0#1_123| 0) (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_7| 2147483647) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_7|) |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_7|) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_7|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_7| 4))) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_7| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_7|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 17:20:35,682 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:20:35,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:20:35,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2023-12-02 17:20:35,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257912931] [2023-12-02 17:20:35,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:20:35,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-12-02 17:20:35,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:20:35,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-12-02 17:20:35,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5576, Invalid=7074, Unknown=10, NotChecked=222, Total=12882 [2023-12-02 17:20:35,688 INFO L87 Difference]: Start difference. First operand 137 states and 168 transitions. Second operand has 101 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 100 states have internal predecessors, (116), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:20:38,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:20:38,501 INFO L93 Difference]: Finished difference Result 666 states and 973 transitions. [2023-12-02 17:20:38,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-12-02 17:20:38,501 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 100 states have internal predecessors, (116), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2023-12-02 17:20:38,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:20:38,506 INFO L225 Difference]: With dead ends: 666 [2023-12-02 17:20:38,506 INFO L226 Difference]: Without dead ends: 579 [2023-12-02 17:20:38,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2228 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5576, Invalid=7074, Unknown=10, NotChecked=222, Total=12882 [2023-12-02 17:20:38,511 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 1044 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 480 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1142 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 480 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 17:20:38,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1142 Valid, 53 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [480 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 17:20:38,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2023-12-02 17:20:38,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 187. [2023-12-02 17:20:38,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 184 states have (on average 1.173913043478261) internal successors, (216), 184 states have internal predecessors, (216), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 17:20:38,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 218 transitions. [2023-12-02 17:20:38,560 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 218 transitions. Word has length 100 [2023-12-02 17:20:38,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:20:38,561 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 218 transitions. [2023-12-02 17:20:38,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 100 states have internal predecessors, (116), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:20:38,561 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 218 transitions. [2023-12-02 17:20:38,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-12-02 17:20:38,563 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:20:38,563 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:20:38,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 17:20:38,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:20:38,770 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:20:38,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:20:38,770 INFO L85 PathProgramCache]: Analyzing trace with hash -972091922, now seen corresponding path program 8 times [2023-12-02 17:20:38,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:20:38,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880802468] [2023-12-02 17:20:38,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:20:38,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:20:38,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:20:44,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5051 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2023-12-02 17:20:44,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:20:44,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880802468] [2023-12-02 17:20:44,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880802468] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:20:44,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267852444] [2023-12-02 17:20:44,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:20:44,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:20:44,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:20:44,682 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:20:44,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 17:20:45,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-12-02 17:20:45,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:20:45,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 17:20:45,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:20:46,404 INFO L134 CoverageAnalysis]: Checked inductivity of 5051 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4996 trivial. 0 not checked. [2023-12-02 17:20:46,404 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:20:46,874 INFO L134 CoverageAnalysis]: Checked inductivity of 5051 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4996 trivial. 0 not checked. [2023-12-02 17:20:46,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267852444] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:20:46,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1450263443] [2023-12-02 17:20:46,876 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 17:20:46,876 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:20:46,876 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:20:46,876 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:20:46,876 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:20:47,385 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 109 for LOIs [2023-12-02 17:20:47,446 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:20:48,870 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_insert_~value#1_97| Int) (|v_ULTIMATE.start_main_#t~ret15#1_104| Int) (|v_ULTIMATE.start_insert_#in~set#1.offset_96| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_elem_exists_~value#1_140| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_137| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_insert_#in~size#1_96| Int) (|v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_main_~n~0#1_124| Int) (|v_ULTIMATE.start_main_#t~mem14#1_106| Int) (|v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_insert_~set#1.offset_97| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_8| Int) (|v_#memory_int_305| (Array Int (Array Int Int))) (|v_ULTIMATE.start_insert_~set#1.base_97| Int) (|v_ULTIMATE.start_insert_~size#1_97| Int) (|v_ULTIMATE.start_insert_#res#1_95| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_147| Int) (|v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_96| Int) (|v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_137| Int) (|v_ULTIMATE.start_elem_exists_~size#1_140| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_insert_#in~value#1_96| Int)) (let ((.cse2 (= |v_ULTIMATE.start_elem_exists_~i~0#1_147| 0)) (.cse0 (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_8| 0))) (let ((.cse3 (<= 1 |v_ULTIMATE.start_elem_exists_~size#1_140|)) (.cse1 (and (<= |v_ULTIMATE.start_elem_exists_~size#1_140| 0) .cse2 .cse0))) (and (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_8|) (<= 0 (+ |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_8| 2147483648)) (or (and (not .cse0) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_8| |v_ULTIMATE.start_insert_#res#1_95|) (= |v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_8| |v_ULTIMATE.start_insert_~set#1.base_97|) (= |v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_8| |v_ULTIMATE.start_insert_#in~set#1.offset_96|) (= |v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_#t~ret15#1_104|) (= |c_#memory_int| |v_#memory_int_305|) (= |v_ULTIMATE.start_insert_~value#1_97| |v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_8|) (= |v_ULTIMATE.start_main_#t~mem14#1_106| |v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_8|) (= |v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_8| |v_ULTIMATE.start_insert_~set#1.offset_97|) (= |v_ULTIMATE.start_insert_#in~set#1.base_96| |v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_8|) (= |v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_8| |v_ULTIMATE.start_insert_#in~value#1_96|) (= |v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_8| |v_ULTIMATE.start_insert_~size#1_97|) (= |v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_8| |v_ULTIMATE.start_insert_#in~size#1_96|) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~n~0#1_124|)) (and (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_8| (+ |v_ULTIMATE.start_main_~n~0#1_124| 1)) (= |c_#memory_int| (store |v_#memory_int_305| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_8| (store (select |v_#memory_int_305| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_8|) (+ (* |v_ULTIMATE.start_main_~n~0#1_124| 4) |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_8|) (select (select |v_#memory_int_305| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_8|) (+ (- 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_8| (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_8| 4)))))) (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_8| 2147483647) (<= 0 (+ |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_8| 2147483648)) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_8|) .cse0)) (or .cse1 (and .cse2 .cse3 .cse0)) (or (and (= |v_ULTIMATE.start_elem_exists_~value#1_140| (select (select |v_#memory_int_305| |v_ULTIMATE.start_elem_exists_~set#1.base_137|) |v_ULTIMATE.start_elem_exists_~set#1.offset_137|)) .cse2 .cse3 .cse0) .cse1) (<= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_8| 2147483647) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_8|) (let ((.cse4 (let ((.cse5 (select |c_#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_8|))) (= (select .cse5 |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_8|) (select .cse5 (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_8| 4)))))) (or (and .cse4 (= |c___VERIFIER_assert_#in~cond| 0)) (and (not .cse4) (= |c___VERIFIER_assert_#in~cond| 1)))))))) is different from true [2023-12-02 17:20:49,289 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8154#(and (exists ((|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_8| Int) (|v_#memory_int_305| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_elem_exists_~value#1_140| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_137| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_147| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_main_~n~0#1_124| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_137| Int) (|v_ULTIMATE.start_elem_exists_~size#1_140| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_8| Int)) (and (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_8|) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_8|) |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_8|) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_8|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_8| 4))) (or (< |v_ULTIMATE.start_elem_exists_~size#1_140| 1) (= |v_ULTIMATE.start_elem_exists_~value#1_140| (select (select |v_#memory_int_305| |v_ULTIMATE.start_elem_exists_~set#1.base_137|) |v_ULTIMATE.start_elem_exists_~set#1.offset_137|))) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_8| (+ |v_ULTIMATE.start_main_~n~0#1_124| 1)) (= |#memory_int| (store |v_#memory_int_305| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_8| (store (select |v_#memory_int_305| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_8|) (+ (* |v_ULTIMATE.start_main_~n~0#1_124| 4) |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_8|) (select (select |v_#memory_int_305| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_8|) (+ (- 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_8| (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_8| 4)))))) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_8|) (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_8| 2147483647) (= |v_ULTIMATE.start_elem_exists_~i~0#1_147| 0) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_8|) (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_8| 0))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 17:20:49,289 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:20:49,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:20:49,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 13, 13] total 123 [2023-12-02 17:20:49,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861131669] [2023-12-02 17:20:49,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:20:49,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2023-12-02 17:20:49,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:20:49,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2023-12-02 17:20:49,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5851, Invalid=12233, Unknown=10, NotChecked=266, Total=18360 [2023-12-02 17:20:49,299 INFO L87 Difference]: Start difference. First operand 187 states and 218 transitions. Second operand has 123 states, 123 states have (on average 1.146341463414634) internal successors, (141), 123 states have internal predecessors, (141), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:20:53,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:20:53,596 INFO L93 Difference]: Finished difference Result 769 states and 1089 transitions. [2023-12-02 17:20:53,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2023-12-02 17:20:53,596 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.146341463414634) internal successors, (141), 123 states have internal predecessors, (141), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2023-12-02 17:20:53,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:20:53,600 INFO L225 Difference]: With dead ends: 769 [2023-12-02 17:20:53,600 INFO L226 Difference]: Without dead ends: 682 [2023-12-02 17:20:53,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4585 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=8557, Invalid=15928, Unknown=11, NotChecked=310, Total=24806 [2023-12-02 17:20:53,602 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 2015 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 535 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2114 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 535 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 17:20:53,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2114 Valid, 96 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [535 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 17:20:53,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2023-12-02 17:20:53,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 284. [2023-12-02 17:20:53,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 281 states have (on average 1.2419928825622777) internal successors, (349), 281 states have internal predecessors, (349), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 17:20:53,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 351 transitions. [2023-12-02 17:20:53,665 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 351 transitions. Word has length 150 [2023-12-02 17:20:53,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:20:53,665 INFO L495 AbstractCegarLoop]: Abstraction has 284 states and 351 transitions. [2023-12-02 17:20:53,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.146341463414634) internal successors, (141), 123 states have internal predecessors, (141), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:20:53,666 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 351 transitions. [2023-12-02 17:20:53,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-12-02 17:20:53,668 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:20:53,668 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:20:53,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 17:20:53,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 17:20:53,869 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:20:53,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:20:53,869 INFO L85 PathProgramCache]: Analyzing trace with hash -161226397, now seen corresponding path program 9 times [2023-12-02 17:20:53,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:20:53,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567266177] [2023-12-02 17:20:53,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:20:53,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:20:54,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:20:59,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5918 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2023-12-02 17:20:59,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:20:59,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567266177] [2023-12-02 17:20:59,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567266177] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:20:59,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278453629] [2023-12-02 17:20:59,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:20:59,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:20:59,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:20:59,915 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:20:59,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 17:21:00,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:21:00,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:21:00,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 1871 conjuncts, 101 conjunts are in the unsatisfiable core [2023-12-02 17:21:00,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:21:00,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5918 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2023-12-02 17:21:00,542 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:21:09,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5918 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2023-12-02 17:21:09,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278453629] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:21:09,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [103910690] [2023-12-02 17:21:09,742 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 17:21:09,742 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:21:09,742 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:21:09,743 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:21:09,743 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:21:10,220 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 109 for LOIs [2023-12-02 17:21:10,279 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:21:11,473 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_9| Int) (|v_#memory_int_458| (Array Int (Array Int Int))) (|v_ULTIMATE.start_insert_#in~value#1_122| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_insert_#in~size#1_122| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_elem_exists_~value#1_188| Int) (|v_ULTIMATE.start_main_#t~mem14#1_132| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_insert_~value#1_123| Int) (|v_ULTIMATE.start_insert_~size#1_123| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_185| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_185| Int) (|v_ULTIMATE.start_insert_~set#1.offset_123| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_195| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_insert_#res#1_121| Int) (|v_ULTIMATE.start_insert_#in~set#1.offset_122| Int) (|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_122| Int) (|v_ULTIMATE.start_insert_~set#1.base_123| Int) (|v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_elem_exists_~size#1_188| Int) (|v_ULTIMATE.start_main_#t~ret15#1_130| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_main_~n~0#1_150| Int)) (let ((.cse2 (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_9| 0)) (.cse4 (= |v_ULTIMATE.start_elem_exists_~i~0#1_195| 0))) (let ((.cse5 (and .cse2 (<= |v_ULTIMATE.start_elem_exists_~size#1_188| 0) .cse4)) (.cse3 (<= 1 |v_ULTIMATE.start_elem_exists_~size#1_188|))) (and (let ((.cse0 (let ((.cse1 (select |c_#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_9|))) (= (select .cse1 |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_9|) (select .cse1 (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_9| 4)))))) (or (and (not .cse0) (= |c___VERIFIER_assert_#in~cond| 1)) (and (= |c___VERIFIER_assert_#in~cond| 0) .cse0))) (<= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_9| 2147483647) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_9|) (or (and (= |v_ULTIMATE.start_insert_~set#1.base_123| |v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_9|) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_9| |v_ULTIMATE.start_insert_#res#1_121|) (= |v_ULTIMATE.start_insert_#in~set#1.base_122| |v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_9|) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~n~0#1_150|) (= |v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_#t~ret15#1_130|) (= |v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_9| |v_ULTIMATE.start_insert_~set#1.offset_123|) (= |v_ULTIMATE.start_main_#t~mem14#1_132| |v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_9|) (not .cse2) (= |v_ULTIMATE.start_insert_~value#1_123| |v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_9|) (= |v_ULTIMATE.start_insert_#in~size#1_122| |v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_9|) (= |v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_9| |v_ULTIMATE.start_insert_#in~set#1.offset_122|) (= |v_ULTIMATE.start_insert_~size#1_123| |v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_9|) (= |c_#memory_int| |v_#memory_int_458|) (= |v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_9| |v_ULTIMATE.start_insert_#in~value#1_122|)) (and (<= 0 (+ |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_9| 2147483648)) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_9|) (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_9| 2147483647) (= (store |v_#memory_int_458| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_9| (store (select |v_#memory_int_458| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_9|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_9| (* |v_ULTIMATE.start_main_~n~0#1_150| 4)) (select (select |v_#memory_int_458| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_9|) (+ (- 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_9| (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_9| 4))))) |c_#memory_int|) .cse2 (= (+ |v_ULTIMATE.start_main_~n~0#1_150| 1) |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_9|))) (<= 0 (+ |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_9| 2147483648)) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_9|) (or (and .cse3 .cse2 .cse4 (= (select (select |v_#memory_int_458| |v_ULTIMATE.start_elem_exists_~set#1.base_185|) |v_ULTIMATE.start_elem_exists_~set#1.offset_185|) |v_ULTIMATE.start_elem_exists_~value#1_188|)) .cse5) (or .cse5 (and .cse3 .cse2 .cse4)))))) is different from true [2023-12-02 17:21:11,849 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11435#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_#memory_int_458| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_195| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_elem_exists_~value#1_188| Int) (|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_185| Int) (|v_ULTIMATE.start_elem_exists_~size#1_188| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_main_~n~0#1_150| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_185| Int)) (and (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_9|) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_9|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_9| 4)) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_9|) |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_9|)) (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_9| 2147483647) (or (< |v_ULTIMATE.start_elem_exists_~size#1_188| 1) (= (select (select |v_#memory_int_458| |v_ULTIMATE.start_elem_exists_~set#1.base_185|) |v_ULTIMATE.start_elem_exists_~set#1.offset_185|) |v_ULTIMATE.start_elem_exists_~value#1_188|)) (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_9| 0) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_9|) (= |v_ULTIMATE.start_elem_exists_~i~0#1_195| 0) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_9|) (= |#memory_int| (store |v_#memory_int_458| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_9| (store (select |v_#memory_int_458| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_9|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_9| (* |v_ULTIMATE.start_main_~n~0#1_150| 4)) (select (select |v_#memory_int_458| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_9|) (+ (- 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_9| (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_9| 4)))))) (= (+ |v_ULTIMATE.start_main_~n~0#1_150| 1) |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_9|))))' at error location [2023-12-02 17:21:11,849 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:21:11,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:21:11,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2023-12-02 17:21:11,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748284850] [2023-12-02 17:21:11,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:21:11,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2023-12-02 17:21:11,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:21:11,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2023-12-02 17:21:11,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21539, Invalid=24465, Unknown=10, NotChecked=426, Total=46440 [2023-12-02 17:21:11,857 INFO L87 Difference]: Start difference. First operand 284 states and 351 transitions. Second operand has 203 states, 203 states have (on average 1.0738916256157636) internal successors, (218), 202 states have internal predecessors, (218), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:21:38,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:21:38,663 INFO L93 Difference]: Finished difference Result 1368 states and 2002 transitions. [2023-12-02 17:21:38,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2023-12-02 17:21:38,663 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0738916256157636) internal successors, (218), 202 states have internal predecessors, (218), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2023-12-02 17:21:38,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:21:38,669 INFO L225 Difference]: With dead ends: 1368 [2023-12-02 17:21:38,669 INFO L226 Difference]: Without dead ends: 1185 [2023-12-02 17:21:38,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 696 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4523 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=21539, Invalid=24465, Unknown=10, NotChecked=426, Total=46440 [2023-12-02 17:21:38,673 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2185 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1483 mSolverCounterSat, 1027 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2385 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 2510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1027 IncrementalHoareTripleChecker+Valid, 1483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:21:38,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2385 Valid, 41 Invalid, 2510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1027 Valid, 1483 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-02 17:21:38,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2023-12-02 17:21:38,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 385. [2023-12-02 17:21:38,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 382 states have (on average 1.1780104712041886) internal successors, (450), 382 states have internal predecessors, (450), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 17:21:38,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 452 transitions. [2023-12-02 17:21:38,731 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 452 transitions. Word has length 199 [2023-12-02 17:21:38,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:21:38,731 INFO L495 AbstractCegarLoop]: Abstraction has 385 states and 452 transitions. [2023-12-02 17:21:38,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0738916256157636) internal successors, (218), 202 states have internal predecessors, (218), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:21:38,732 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 452 transitions. [2023-12-02 17:21:38,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2023-12-02 17:21:38,735 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:21:38,735 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:21:38,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 17:21:38,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 17:21:38,936 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:21:38,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:21:38,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1987832178, now seen corresponding path program 10 times [2023-12-02 17:21:38,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:21:38,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862529231] [2023-12-02 17:21:38,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:21:38,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:21:39,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:22:01,031 INFO L134 CoverageAnalysis]: Checked inductivity of 21068 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2023-12-02 17:22:01,031 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:22:01,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862529231] [2023-12-02 17:22:01,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862529231] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:22:01,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427493661] [2023-12-02 17:22:01,032 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:22:01,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:22:01,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:22:01,033 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:22:01,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 17:22:01,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:22:01,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 2780 conjuncts, 202 conjunts are in the unsatisfiable core [2023-12-02 17:22:01,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:22:01,907 INFO L134 CoverageAnalysis]: Checked inductivity of 21068 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2023-12-02 17:22:01,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:22:39,543 INFO L134 CoverageAnalysis]: Checked inductivity of 21068 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2023-12-02 17:22:39,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427493661] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:22:39,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1999183964] [2023-12-02 17:22:39,546 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 17:22:39,546 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:22:39,546 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:22:39,546 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:22:39,547 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:22:40,054 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 109 for LOIs [2023-12-02 17:22:40,114 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:22:42,039 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_10| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_10| Int) (|v_#memory_int_712| (Array Int (Array Int Int))) (|v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_10| Int) (|v_ULTIMATE.start_insert_#in~value#1_148| Int) (|v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_10| Int) (|v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_10| Int) (|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_10| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_10| Int) (|v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_10| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_10| Int) (|v_ULTIMATE.start_elem_exists_~size#1_236| Int) (|v_ULTIMATE.start_insert_~value#1_149| Int) (|v_ULTIMATE.start_insert_~size#1_149| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_10| Int) (|v_ULTIMATE.start_insert_#in~size#1_148| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_10| Int) (|v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_10| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_10| Int) (|v_ULTIMATE.start_elem_exists_~value#1_236| Int) (|v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_10| Int) (|v_ULTIMATE.start_insert_#res#1_147| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_148| Int) (|v_ULTIMATE.start_insert_~set#1.base_149| Int) (|v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_10| Int) (|v_ULTIMATE.start_insert_#in~set#1.offset_148| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_10| Int) (|v_ULTIMATE.start_main_#t~mem14#1_158| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_233| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_243| Int) (|v_ULTIMATE.start_main_~n~0#1_176| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_233| Int) (|v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_10| Int) (|v_ULTIMATE.start_main_#t~ret15#1_156| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_10| Int) (|v_ULTIMATE.start_insert_~set#1.offset_149| Int)) (let ((.cse0 (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_10| 0)) (.cse2 (= |v_ULTIMATE.start_elem_exists_~i~0#1_243| 0))) (let ((.cse3 (and (<= |v_ULTIMATE.start_elem_exists_~size#1_236| 0) .cse0 .cse2)) (.cse1 (<= 1 |v_ULTIMATE.start_elem_exists_~size#1_236|))) (and (or (and .cse0 (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_10| 2147483647) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_10| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_10|) (= (+ |v_ULTIMATE.start_main_~n~0#1_176| 1) |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_10|) (= (store |v_#memory_int_712| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_10| (store (select |v_#memory_int_712| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_10|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_10| (* |v_ULTIMATE.start_main_~n~0#1_176| 4)) (select (select |v_#memory_int_712| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_10|) (+ (- 4) (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_10| 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_10|)))) |c_#memory_int|) (<= 0 (+ |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_10| 2147483648))) (and (= |v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_10| |v_ULTIMATE.start_insert_#in~value#1_148|) (= |v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_10| |v_ULTIMATE.start_insert_#in~set#1.offset_148|) (= |v_ULTIMATE.start_insert_~value#1_149| |v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_10|) (= |v_ULTIMATE.start_insert_#in~set#1.base_148| |v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_10|) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_10| |v_ULTIMATE.start_insert_#res#1_147|) (= |v_ULTIMATE.start_insert_#in~size#1_148| |v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_10|) (not .cse0) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_10| |v_ULTIMATE.start_main_~n~0#1_176|) (= |v_ULTIMATE.start_main_#t~mem14#1_158| |v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_10|) (= |c_#memory_int| |v_#memory_int_712|) (= |v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_10| |v_ULTIMATE.start_insert_~size#1_149|) (= |v_ULTIMATE.start_main_#t~ret15#1_156| |v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_10|) (= |v_ULTIMATE.start_insert_~set#1.offset_149| |v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_10|) (= |v_ULTIMATE.start_insert_~set#1.base_149| |v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_10|))) (<= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_10| 2147483647) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_10|) (or (and .cse0 .cse1 .cse2) .cse3) (<= 0 (+ |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_10| 2147483648)) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_10|) (let ((.cse4 (let ((.cse5 (select |c_#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_10|))) (= (select .cse5 (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_10| 4)) (select .cse5 |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_10|))))) (or (and (= |c___VERIFIER_assert_#in~cond| 0) .cse4) (and (not .cse4) (= |c___VERIFIER_assert_#in~cond| 1)))) (or .cse3 (and .cse0 (= |v_ULTIMATE.start_elem_exists_~value#1_236| (select (select |v_#memory_int_712| |v_ULTIMATE.start_elem_exists_~set#1.base_233|) |v_ULTIMATE.start_elem_exists_~set#1.offset_233|)) .cse1 .cse2)))))) is different from true [2023-12-02 17:22:42,716 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16744#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_10| Int) (|v_#memory_int_712| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_10| Int) (|v_ULTIMATE.start_elem_exists_~value#1_236| Int) (|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_10| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_10| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_10| Int) (|v_ULTIMATE.start_elem_exists_~size#1_236| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_233| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_10| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_243| Int) (|v_ULTIMATE.start_main_~n~0#1_176| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_233| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_10| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_10| Int)) (and (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_10| 0) (= |#memory_int| (store |v_#memory_int_712| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_10| (store (select |v_#memory_int_712| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_10|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_10| (* |v_ULTIMATE.start_main_~n~0#1_176| 4)) (select (select |v_#memory_int_712| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_10|) (+ (- 4) (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_10| 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_10|))))) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_10|) (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_10| 2147483647) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_10| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_10|) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_10|) |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_10|) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_10|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_10| 4))) (= (+ |v_ULTIMATE.start_main_~n~0#1_176| 1) |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_10|) (or (= |v_ULTIMATE.start_elem_exists_~value#1_236| (select (select |v_#memory_int_712| |v_ULTIMATE.start_elem_exists_~set#1.base_233|) |v_ULTIMATE.start_elem_exists_~set#1.offset_233|)) (< |v_ULTIMATE.start_elem_exists_~size#1_236| 1)) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_10|) (= |v_ULTIMATE.start_elem_exists_~i~0#1_243| 0))))' at error location [2023-12-02 17:22:42,716 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:22:42,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:22:42,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202, 202] total 404 [2023-12-02 17:22:42,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463153852] [2023-12-02 17:22:42,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:22:42,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2023-12-02 17:22:42,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:22:42,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2023-12-02 17:22:42,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83856, Invalid=89610, Unknown=10, NotChecked=830, Total=174306 [2023-12-02 17:22:42,735 INFO L87 Difference]: Start difference. First operand 385 states and 452 transitions. Second operand has 405 states, 405 states have (on average 1.037037037037037) internal successors, (420), 404 states have internal predecessors, (420), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:28:25,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:28:25,396 INFO L93 Difference]: Finished difference Result 2378 states and 3517 transitions. [2023-12-02 17:28:25,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2023-12-02 17:28:25,397 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.037037037037037) internal successors, (420), 404 states have internal predecessors, (420), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 300 [2023-12-02 17:28:25,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:28:25,411 INFO L225 Difference]: With dead ends: 2378 [2023-12-02 17:28:25,411 INFO L226 Difference]: Without dead ends: 2195 [2023-12-02 17:28:25,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1100 GetRequests, 684 SyntacticMatches, 0 SemanticMatches, 416 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 9068 ImplicationChecksByTransitivity, 52.4s TimeCoverageRelationStatistics Valid=83856, Invalid=89610, Unknown=10, NotChecked=830, Total=174306 [2023-12-02 17:28:25,425 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 5438 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 2935 mSolverCounterSat, 2621 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5840 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 5556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2621 IncrementalHoareTripleChecker+Valid, 2935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:28:25,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5840 Valid, 61 Invalid, 5556 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2621 Valid, 2935 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-12-02 17:28:25,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2195 states. [2023-12-02 17:28:25,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2195 to 587. [2023-12-02 17:28:25,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 584 states have (on average 1.1164383561643836) internal successors, (652), 584 states have internal predecessors, (652), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 17:28:25,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 654 transitions. [2023-12-02 17:28:25,610 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 654 transitions. Word has length 300 [2023-12-02 17:28:25,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:28:25,610 INFO L495 AbstractCegarLoop]: Abstraction has 587 states and 654 transitions. [2023-12-02 17:28:25,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.037037037037037) internal successors, (420), 404 states have internal predecessors, (420), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:28:25,611 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 654 transitions. [2023-12-02 17:28:25,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2023-12-02 17:28:25,622 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:28:25,622 INFO L195 NwaCegarLoop]: trace histogram [402, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:28:25,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-02 17:28:25,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:28:25,823 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:28:25,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:28:25,823 INFO L85 PathProgramCache]: Analyzing trace with hash 329423790, now seen corresponding path program 11 times [2023-12-02 17:28:25,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:28:25,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782042951] [2023-12-02 17:28:25,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:28:25,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:28:26,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:29:54,891 INFO L134 CoverageAnalysis]: Checked inductivity of 81971 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2023-12-02 17:29:54,891 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:29:54,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782042951] [2023-12-02 17:29:54,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782042951] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:29:54,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486695975] [2023-12-02 17:29:54,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:29:54,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:29:54,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:29:54,894 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:29:54,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a8b2f7-0aef-44a6-97ad-b6b2e2dcef17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 17:29:55,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-12-02 17:29:55,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:29:55,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:29:55,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:29:56,973 INFO L134 CoverageAnalysis]: Checked inductivity of 81971 backedges. 104 proven. 1 refuted. 0 times theorem prover too weak. 81866 trivial. 0 not checked. [2023-12-02 17:29:56,973 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:29:59,010 INFO L134 CoverageAnalysis]: Checked inductivity of 81971 backedges. 104 proven. 1 refuted. 0 times theorem prover too weak. 81866 trivial. 0 not checked. [2023-12-02 17:29:59,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486695975] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:29:59,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2008916045] [2023-12-02 17:29:59,012 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 17:29:59,012 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:29:59,013 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:29:59,013 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:29:59,013 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:29:59,480 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 109 for LOIs [2023-12-02 17:29:59,539 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:30:03,005 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_insert_~set#1.offset_176| Int) (|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_elem_exists_~value#1_284| Int) (|v_ULTIMATE.start_insert_#in~set#1.offset_175| Int) (|v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_insert_#res#1_174| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_281| Int) (|v_ULTIMATE.start_main_~n~0#1_203| Int) (|v_ULTIMATE.start_insert_~set#1.base_176| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_175| Int) (|v_ULTIMATE.start_main_#t~ret15#1_183| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_281| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_insert_#in~value#1_175| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_insert_#in~size#1_175| Int) (|v_ULTIMATE.start_main_#t~mem14#1_185| Int) (|v_#memory_int_1169| (Array Int (Array Int Int))) (|v_ULTIMATE.start_elem_exists_~i~0#1_291| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_insert_~size#1_176| Int) (|v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_elem_exists_~size#1_284| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_insert_~value#1_176| Int) (|v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_11| Int)) (let ((.cse4 (= |v_ULTIMATE.start_elem_exists_~i~0#1_291| 0)) (.cse5 (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_11| 0))) (let ((.cse2 (and .cse4 .cse5 (<= |v_ULTIMATE.start_elem_exists_~size#1_284| 0))) (.cse3 (<= 1 |v_ULTIMATE.start_elem_exists_~size#1_284|))) (and (let ((.cse0 (let ((.cse1 (select |c_#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_11|))) (= (select .cse1 (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_11| 4)) (select .cse1 |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_11|))))) (or (and .cse0 (= |c___VERIFIER_assert_#in~cond| 0)) (and (not .cse0) (= |c___VERIFIER_assert_#in~cond| 1)))) (or .cse2 (and .cse3 .cse4 .cse5)) (<= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_11| 2147483647) (or .cse2 (and .cse3 (= (select (select |v_#memory_int_1169| |v_ULTIMATE.start_elem_exists_~set#1.base_281|) |v_ULTIMATE.start_elem_exists_~set#1.offset_281|) |v_ULTIMATE.start_elem_exists_~value#1_284|) .cse4 .cse5)) (<= 0 (+ |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_11| 2147483648)) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_11|) (or (and (= |v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_11| |v_ULTIMATE.start_insert_~size#1_176|) (= |v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_11| |v_ULTIMATE.start_insert_#in~value#1_175|) (= |v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_11| |v_ULTIMATE.start_insert_#in~set#1.offset_175|) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_11| |v_ULTIMATE.start_insert_#res#1_174|) (= |v_ULTIMATE.start_insert_#in~size#1_175| |v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_11|) (= |v_ULTIMATE.start_insert_~set#1.base_176| |v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_11|) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_11| |v_ULTIMATE.start_main_~n~0#1_203|) (= |v_ULTIMATE.start_insert_#in~set#1.base_175| |v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_11|) (= |v_ULTIMATE.start_insert_~value#1_176| |v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_11|) (= |v_ULTIMATE.start_main_#t~mem14#1_185| |v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_11|) (= |v_#memory_int_1169| |c_#memory_int|) (not .cse5) (= |v_ULTIMATE.start_main_#t~ret15#1_183| |v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_11|) (= |v_ULTIMATE.start_insert_~set#1.offset_176| |v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_11|)) (and (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_11| 2147483647) (<= 0 (+ |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_11| 2147483648)) .cse5 (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_11| (+ |v_ULTIMATE.start_main_~n~0#1_203| 1)) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_11| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_11|) (= (store |v_#memory_int_1169| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_11| (store (select |v_#memory_int_1169| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_11|) (+ (* |v_ULTIMATE.start_main_~n~0#1_203| 4) |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_11|) (select (select |v_#memory_int_1169| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_11|) (+ (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_11| 4) (- 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_11|)))) |c_#memory_int|))) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_11|))))) is different from true [2023-12-02 17:30:04,336 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25495#(and (exists ((|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_11| Int) (|v_#memory_int_1169| (Array Int (Array Int Int))) (|v_ULTIMATE.start_elem_exists_~value#1_284| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_291| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_281| Int) (|v_ULTIMATE.start_main_~n~0#1_203| Int) (|v_ULTIMATE.start_elem_exists_~size#1_284| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_281| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_11| Int)) (and (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_11| 2147483647) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_11|) |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_11|) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_11|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_11| 4))) (= |v_ULTIMATE.start_elem_exists_~i~0#1_291| 0) (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_11| 0) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_11| (+ |v_ULTIMATE.start_main_~n~0#1_203| 1)) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_11| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_11|) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_11|) (= |#memory_int| (store |v_#memory_int_1169| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_11| (store (select |v_#memory_int_1169| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_11|) (+ (* |v_ULTIMATE.start_main_~n~0#1_203| 4) |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_11|) (select (select |v_#memory_int_1169| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_11|) (+ (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_11| 4) (- 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_11|))))) (or (= (select (select |v_#memory_int_1169| |v_ULTIMATE.start_elem_exists_~set#1.base_281|) |v_ULTIMATE.start_elem_exists_~set#1.offset_281|) |v_ULTIMATE.start_elem_exists_~value#1_284|) (< |v_ULTIMATE.start_elem_exists_~size#1_284| 1)) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_11|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 17:30:04,337 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:30:04,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:30:04,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [404, 5, 5] total 412 [2023-12-02 17:30:04,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650293222] [2023-12-02 17:30:04,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:30:04,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 413 states [2023-12-02 17:30:04,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:30:04,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 413 interpolants. [2023-12-02 17:30:04,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83905, Invalid=96289, Unknown=10, NotChecked=846, Total=181050 [2023-12-02 17:30:04,368 INFO L87 Difference]: Start difference. First operand 587 states and 654 transitions. Second operand has 413 states, 413 states have (on average 1.0653753026634383) internal successors, (440), 412 states have internal predecessors, (440), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)