./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/sep.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/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_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/sep.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/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_2e6945b1-6b40-4574-b566-e87b84692a07/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 54d2da4a9e5a645ffa7361038eff25cc32e29a265e0324de9bda9a6d773becac --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 17:48:09,162 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 17:48:09,225 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 17:48:09,229 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 17:48:09,230 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 17:48:09,254 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 17:48:09,255 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 17:48:09,255 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 17:48:09,256 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 17:48:09,256 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 17:48:09,257 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 17:48:09,258 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 17:48:09,258 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 17:48:09,259 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 17:48:09,259 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 17:48:09,260 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 17:48:09,260 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 17:48:09,261 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 17:48:09,261 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 17:48:09,262 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 17:48:09,263 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 17:48:09,263 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 17:48:09,264 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 17:48:09,265 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 17:48:09,265 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 17:48:09,266 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 17:48:09,266 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 17:48:09,266 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 17:48:09,267 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 17:48:09,267 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 17:48:09,268 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 17:48:09,268 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 17:48:09,268 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 17:48:09,268 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 17:48:09,269 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 17:48:09,269 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 17:48:09,269 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 17:48:09,269 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:48:09,270 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 17:48:09,270 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 17:48:09,270 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 17:48:09,271 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 17:48:09,271 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 17:48:09,271 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 17:48:09,271 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 17:48:09,271 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 17:48:09,272 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 17:48:09,272 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_2e6945b1-6b40-4574-b566-e87b84692a07/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54d2da4a9e5a645ffa7361038eff25cc32e29a265e0324de9bda9a6d773becac [2023-12-02 17:48:09,491 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 17:48:09,509 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 17:48:09,512 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 17:48:09,513 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 17:48:09,513 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 17:48:09,514 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/reducercommutativity/sep.i [2023-12-02 17:48:12,234 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 17:48:12,403 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 17:48:12,403 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/sv-benchmarks/c/reducercommutativity/sep.i [2023-12-02 17:48:12,411 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/data/19d41c853/4fd21afdd40a48f0a8f1a4c247784913/FLAG064650338 [2023-12-02 17:48:12,423 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/data/19d41c853/4fd21afdd40a48f0a8f1a4c247784913 [2023-12-02 17:48:12,425 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 17:48:12,427 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 17:48:12,428 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 17:48:12,428 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 17:48:12,434 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 17:48:12,435 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:48:12" (1/1) ... [2023-12-02 17:48:12,436 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36ee23ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:48:12, skipping insertion in model container [2023-12-02 17:48:12,437 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:48:12" (1/1) ... [2023-12-02 17:48:12,460 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 17:48:12,611 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_2e6945b1-6b40-4574-b566-e87b84692a07/sv-benchmarks/c/reducercommutativity/sep.i[1298,1311] [2023-12-02 17:48:12,614 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:48:12,623 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 17:48:12,645 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_2e6945b1-6b40-4574-b566-e87b84692a07/sv-benchmarks/c/reducercommutativity/sep.i[1298,1311] [2023-12-02 17:48:12,645 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:48:12,657 INFO L206 MainTranslator]: Completed translation [2023-12-02 17:48:12,658 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:48:12 WrapperNode [2023-12-02 17:48:12,658 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 17:48:12,659 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 17:48:12,659 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 17:48:12,659 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 17:48:12,665 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:48:12" (1/1) ... [2023-12-02 17:48:12,671 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:48:12" (1/1) ... [2023-12-02 17:48:12,686 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2023-12-02 17:48:12,686 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 17:48:12,687 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 17:48:12,687 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 17:48:12,687 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 17:48:12,695 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:48:12" (1/1) ... [2023-12-02 17:48:12,696 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:48:12" (1/1) ... [2023-12-02 17:48:12,698 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:48:12" (1/1) ... [2023-12-02 17:48:12,699 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:48:12" (1/1) ... [2023-12-02 17:48:12,704 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:48:12" (1/1) ... [2023-12-02 17:48:12,708 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:48:12" (1/1) ... [2023-12-02 17:48:12,709 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:48:12" (1/1) ... [2023-12-02 17:48:12,710 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:48:12" (1/1) ... [2023-12-02 17:48:12,713 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 17:48:12,714 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 17:48:12,714 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 17:48:12,714 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 17:48:12,715 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:48:12" (1/1) ... [2023-12-02 17:48:12,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:48:12,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:48:12,742 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 17:48:12,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 17:48:12,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 17:48:12,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 17:48:12,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 17:48:12,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 17:48:12,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 17:48:12,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 17:48:12,775 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 17:48:12,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 17:48:12,775 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2023-12-02 17:48:12,775 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2023-12-02 17:48:12,856 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 17:48:12,859 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 17:48:13,014 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 17:48:13,066 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 17:48:13,067 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 17:48:13,068 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:48:13 BoogieIcfgContainer [2023-12-02 17:48:13,069 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 17:48:13,072 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 17:48:13,072 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 17:48:13,075 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 17:48:13,076 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:48:12" (1/3) ... [2023-12-02 17:48:13,077 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@559eb2a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:48:13, skipping insertion in model container [2023-12-02 17:48:13,077 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:48:12" (2/3) ... [2023-12-02 17:48:13,077 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@559eb2a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:48:13, skipping insertion in model container [2023-12-02 17:48:13,077 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:48:13" (3/3) ... [2023-12-02 17:48:13,079 INFO L112 eAbstractionObserver]: Analyzing ICFG sep.i [2023-12-02 17:48:13,099 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 17:48:13,099 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 17:48:13,151 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 17:48:13,158 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;@303a2e87, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 17:48:13,159 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 17:48:13,163 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 17:48:13,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 17:48:13,172 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:48:13,172 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:48:13,173 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:48:13,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:48:13,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1650253394, now seen corresponding path program 1 times [2023-12-02 17:48:13,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:48:13,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111120804] [2023-12-02 17:48:13,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:48:13,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:48:13,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:48:13,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 17:48:13,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:48:13,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111120804] [2023-12-02 17:48:13,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111120804] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:48:13,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94571281] [2023-12-02 17:48:13,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:48:13,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:48:13,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:48:13,494 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:48:13,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 17:48:13,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:48:13,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 17:48:13,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:48:13,646 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 17:48:13,647 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:48:13,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94571281] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:48:13,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:48:13,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2023-12-02 17:48:13,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399469268] [2023-12-02 17:48:13,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:48:13,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:48:13,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:48:13,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:48:13,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:48:13,680 INFO L87 Difference]: Start difference. First operand has 18 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 17:48:13,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:48:13,737 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2023-12-02 17:48:13,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 17:48:13,740 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2023-12-02 17:48:13,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:48:13,747 INFO L225 Difference]: With dead ends: 36 [2023-12-02 17:48:13,747 INFO L226 Difference]: Without dead ends: 16 [2023-12-02 17:48:13,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:48:13,754 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 18 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:48:13,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 23 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:48:13,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-12-02 17:48:13,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-12-02 17:48:13,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 17:48:13,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2023-12-02 17:48:13,791 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 20 [2023-12-02 17:48:13,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:48:13,791 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2023-12-02 17:48:13,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 17:48:13,792 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2023-12-02 17:48:13,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 17:48:13,794 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:48:13,794 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:48:13,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 17:48:13,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:48:13,995 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:48:13,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:48:13,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1140555386, now seen corresponding path program 1 times [2023-12-02 17:48:13,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:48:13,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818141455] [2023-12-02 17:48:13,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:48:13,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:48:14,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:48:14,157 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:48:14,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:48:14,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818141455] [2023-12-02 17:48:14,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818141455] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:48:14,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:48:14,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 17:48:14,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600254658] [2023-12-02 17:48:14,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:48:14,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:48:14,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:48:14,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:48:14,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:48:14,161 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 17:48:14,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:48:14,192 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2023-12-02 17:48:14,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 17:48:14,193 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2023-12-02 17:48:14,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:48:14,193 INFO L225 Difference]: With dead ends: 26 [2023-12-02 17:48:14,194 INFO L226 Difference]: Without dead ends: 17 [2023-12-02 17:48:14,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:48:14,196 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 13 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:48:14,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 18 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:48:14,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-12-02 17:48:14,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-12-02 17:48:14,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 17:48:14,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2023-12-02 17:48:14,202 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 23 [2023-12-02 17:48:14,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:48:14,204 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2023-12-02 17:48:14,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 17:48:14,204 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2023-12-02 17:48:14,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 17:48:14,205 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:48:14,205 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:48:14,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 17:48:14,206 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:48:14,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:48:14,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1522911853, now seen corresponding path program 1 times [2023-12-02 17:48:14,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:48:14,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505388464] [2023-12-02 17:48:14,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:48:14,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:48:14,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:48:14,331 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 17:48:14,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:48:14,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505388464] [2023-12-02 17:48:14,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505388464] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:48:14,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780955637] [2023-12-02 17:48:14,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:48:14,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:48:14,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:48:14,334 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:48:14,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 17:48:14,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:48:14,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 17:48:14,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:48:14,458 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 17:48:14,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:48:14,546 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 17:48:14,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780955637] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:48:14,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [474186736] [2023-12-02 17:48:14,567 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 17:48:14,567 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:48:14,570 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:48:14,575 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:48:14,576 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:48:17,419 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 14 for LOIs [2023-12-02 17:48:17,469 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:48:24,397 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '370#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= ~N~0 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 2 ~N~0) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (or (and (exists ((|v_#memory_int_32| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_32| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_32| |ULTIMATE.start_main_~#x~0#1.base|) (+ (* ~N~0 4) (- 4)) |ULTIMATE.start_main_~temp~0#1|)))) (exists ((v_sep_~i~0_43 Int) (v_sep_~ret~0_BEFORE_RETURN_5 Int)) (and (or (= (mod v_sep_~ret~0_BEFORE_RETURN_5 4294967296) (+ |ULTIMATE.start_main_~ret5~0#1| 4294967296)) (= |ULTIMATE.start_main_~ret5~0#1| (mod v_sep_~ret~0_BEFORE_RETURN_5 4294967296))) (<= ~N~0 v_sep_~i~0_43)))) (and (exists ((|v_#memory_int_32| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_32| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_32| |ULTIMATE.start_main_~#x~0#1.base|) (+ (* ~N~0 4) (- 4)) |ULTIMATE.start_main_~temp~0#1|)))) (exists ((v_sep_~i~0_43 Int) (v_sep_~ret~0_BEFORE_RETURN_6 Int)) (and (or (= (+ |ULTIMATE.start_main_~ret5~0#1| 4294967296) (mod v_sep_~ret~0_BEFORE_RETURN_6 4294967296)) (= |ULTIMATE.start_main_~ret5~0#1| (mod v_sep_~ret~0_BEFORE_RETURN_6 4294967296))) (<= ~N~0 v_sep_~i~0_43))))))' at error location [2023-12-02 17:48:24,397 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:48:24,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:48:24,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2023-12-02 17:48:24,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435299571] [2023-12-02 17:48:24,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:48:24,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 17:48:24,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:48:24,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 17:48:24,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=418, Unknown=4, NotChecked=0, Total=506 [2023-12-02 17:48:24,400 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 17:48:24,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:48:24,452 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2023-12-02 17:48:24,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:48:24,453 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 24 [2023-12-02 17:48:24,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:48:24,453 INFO L225 Difference]: With dead ends: 32 [2023-12-02 17:48:24,454 INFO L226 Difference]: Without dead ends: 18 [2023-12-02 17:48:24,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=93, Invalid=455, Unknown=4, NotChecked=0, Total=552 [2023-12-02 17:48:24,455 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 15 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:48:24,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 41 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:48:24,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-12-02 17:48:24,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-12-02 17:48:24,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 17:48:24,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2023-12-02 17:48:24,459 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 24 [2023-12-02 17:48:24,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:48:24,459 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2023-12-02 17:48:24,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 17:48:24,459 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2023-12-02 17:48:24,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 17:48:24,460 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:48:24,460 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:48:24,465 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 17:48:24,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:48:24,661 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:48:24,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:48:24,661 INFO L85 PathProgramCache]: Analyzing trace with hash -215553355, now seen corresponding path program 2 times [2023-12-02 17:48:24,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:48:24,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103489184] [2023-12-02 17:48:24,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:48:24,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:48:24,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:48:33,709 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 17:48:33,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:48:33,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103489184] [2023-12-02 17:48:33,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103489184] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:48:33,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145629340] [2023-12-02 17:48:33,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:48:33,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:48:33,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:48:33,715 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:48:33,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 17:48:33,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 17:48:33,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:48:33,911 WARN L260 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 88 conjunts are in the unsatisfiable core [2023-12-02 17:48:33,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:48:34,590 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:48:34,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 71 [2023-12-02 17:48:35,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:48:35,740 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 17:48:35,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 191 treesize of output 141 [2023-12-02 17:48:35,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:48:36,027 INFO L349 Elim1Store]: treesize reduction 20, result has 50.0 percent of original size [2023-12-02 17:48:36,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 227 treesize of output 190 [2023-12-02 17:48:37,178 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:48:37,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 241 treesize of output 169 [2023-12-02 17:48:37,401 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 17:48:37,401 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:48:38,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145629340] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:48:38,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2126877869] [2023-12-02 17:48:38,178 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 17:48:38,178 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:48:38,179 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:48:38,179 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:48:38,179 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:48:39,475 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 14 for LOIs [2023-12-02 17:48:39,505 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:49:01,458 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '595#(and (or (and (exists ((|v_#memory_int_42| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_42| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_42| |ULTIMATE.start_main_~#x~0#1.base|) (+ (* ~N~0 4) (- 4)) |ULTIMATE.start_main_~temp~0#1|)))) (exists ((v_sep_~i~0_67 Int) (v_sep_~ret~0_BEFORE_RETURN_12 Int)) (and (<= ~N~0 v_sep_~i~0_67) (or (= (mod v_sep_~ret~0_BEFORE_RETURN_12 4294967296) |ULTIMATE.start_main_~ret5~0#1|) (= (mod v_sep_~ret~0_BEFORE_RETURN_12 4294967296) (+ |ULTIMATE.start_main_~ret5~0#1| 4294967296)))))) (and (exists ((|v_#memory_int_42| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_42| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_42| |ULTIMATE.start_main_~#x~0#1.base|) (+ (* ~N~0 4) (- 4)) |ULTIMATE.start_main_~temp~0#1|)))) (exists ((v_sep_~ret~0_BEFORE_RETURN_11 Int) (v_sep_~i~0_67 Int)) (and (<= ~N~0 v_sep_~i~0_67) (or (= (mod v_sep_~ret~0_BEFORE_RETURN_11 4294967296) (+ |ULTIMATE.start_main_~ret5~0#1| 4294967296)) (= (mod v_sep_~ret~0_BEFORE_RETURN_11 4294967296) |ULTIMATE.start_main_~ret5~0#1|)))))) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= ~N~0 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 2 ~N~0) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647))' at error location [2023-12-02 17:49:01,458 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:49:01,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:49:01,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 43 [2023-12-02 17:49:01,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410616379] [2023-12-02 17:49:01,458 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:49:01,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-12-02 17:49:01,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:49:01,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-12-02 17:49:01,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=3054, Unknown=11, NotChecked=0, Total=3306 [2023-12-02 17:49:01,462 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 43 states, 32 states have (on average 1.15625) internal successors, (37), 35 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 17:49:03,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:49:06,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:49:24,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:49:25,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:49:27,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:49:28,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:49:28,565 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2023-12-02 17:49:28,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-02 17:49:28,566 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 32 states have (on average 1.15625) internal successors, (37), 35 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 27 [2023-12-02 17:49:28,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:49:28,568 INFO L225 Difference]: With dead ends: 51 [2023-12-02 17:49:28,568 INFO L226 Difference]: Without dead ends: 47 [2023-12-02 17:49:28,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1518 ImplicationChecksByTransitivity, 43.1s TimeCoverageRelationStatistics Valid=382, Invalid=4429, Unknown=19, NotChecked=0, Total=4830 [2023-12-02 17:49:28,571 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 60 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 23 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:49:28,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 129 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 611 Invalid, 5 Unknown, 0 Unchecked, 9.3s Time] [2023-12-02 17:49:28,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-12-02 17:49:28,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2023-12-02 17:49:28,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 28 states have internal predecessors, (33), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2023-12-02 17:49:28,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 50 transitions. [2023-12-02 17:49:28,583 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 50 transitions. Word has length 27 [2023-12-02 17:49:28,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:49:28,583 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 50 transitions. [2023-12-02 17:49:28,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 32 states have (on average 1.15625) internal successors, (37), 35 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 17:49:28,583 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 50 transitions. [2023-12-02 17:49:28,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 17:49:28,584 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:49:28,585 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:49:28,589 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 17:49:28,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:49:28,785 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:49:28,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:49:28,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1805624363, now seen corresponding path program 3 times [2023-12-02 17:49:28,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:49:28,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843860433] [2023-12-02 17:49:28,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:49:28,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:49:28,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:49:28,888 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 28 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 17:49:28,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:49:28,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843860433] [2023-12-02 17:49:28,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843860433] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:49:28,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931839456] [2023-12-02 17:49:28,889 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:49:28,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:49:28,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:49:28,890 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:49:28,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 17:49:29,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:49:29,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:49:29,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 17:49:29,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:49:29,078 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:49:29,078 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:49:29,197 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-02 17:49:29,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931839456] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:49:29,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [671642347] [2023-12-02 17:49:29,199 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 17:49:29,199 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:49:29,200 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:49:29,200 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:49:29,200 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:49:30,676 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 14 for LOIs [2023-12-02 17:49:30,707 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:49:33,530 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '944#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= ~N~0 2147483647) (or (and (exists ((|v_#memory_int_48| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_48| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_48| |ULTIMATE.start_main_~#x~0#1.base|) (+ (* ~N~0 4) (- 4)) |ULTIMATE.start_main_~temp~0#1|)))) (exists ((v_sep_~i~0_101 Int) (v_sep_~ret~0_BEFORE_RETURN_18 Int)) (and (or (= |ULTIMATE.start_main_~ret5~0#1| (mod v_sep_~ret~0_BEFORE_RETURN_18 4294967296)) (= (mod v_sep_~ret~0_BEFORE_RETURN_18 4294967296) (+ |ULTIMATE.start_main_~ret5~0#1| 4294967296))) (<= ~N~0 v_sep_~i~0_101)))) (and (exists ((|v_#memory_int_48| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_48| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_48| |ULTIMATE.start_main_~#x~0#1.base|) (+ (* ~N~0 4) (- 4)) |ULTIMATE.start_main_~temp~0#1|)))) (exists ((v_sep_~ret~0_BEFORE_RETURN_17 Int) (v_sep_~i~0_101 Int)) (and (or (= |ULTIMATE.start_main_~ret5~0#1| (mod v_sep_~ret~0_BEFORE_RETURN_17 4294967296)) (= (mod v_sep_~ret~0_BEFORE_RETURN_17 4294967296) (+ |ULTIMATE.start_main_~ret5~0#1| 4294967296))) (<= ~N~0 v_sep_~i~0_101))))) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 2 ~N~0) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647))' at error location [2023-12-02 17:49:33,530 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:49:33,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:49:33,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 17 [2023-12-02 17:49:33,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913422859] [2023-12-02 17:49:33,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:49:33,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 17:49:33,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:49:33,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 17:49:33,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=764, Unknown=2, NotChecked=0, Total=870 [2023-12-02 17:49:33,533 INFO L87 Difference]: Start difference. First operand 37 states and 50 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 17:49:33,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:49:33,784 INFO L93 Difference]: Finished difference Result 62 states and 79 transitions. [2023-12-02 17:49:33,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 17:49:33,784 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 28 [2023-12-02 17:49:33,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:49:33,785 INFO L225 Difference]: With dead ends: 62 [2023-12-02 17:49:33,785 INFO L226 Difference]: Without dead ends: 24 [2023-12-02 17:49:33,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=215, Invalid=1589, Unknown=2, NotChecked=0, Total=1806 [2023-12-02 17:49:33,787 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 16 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:49:33,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 139 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:49:33,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-12-02 17:49:33,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2023-12-02 17:49:33,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 17:49:33,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2023-12-02 17:49:33,793 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 28 [2023-12-02 17:49:33,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:49:33,793 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2023-12-02 17:49:33,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 17:49:33,794 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2023-12-02 17:49:33,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 17:49:33,794 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:49:33,795 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:49:33,799 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 17:49:33,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:49:33,995 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:49:33,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:49:33,995 INFO L85 PathProgramCache]: Analyzing trace with hash 82903206, now seen corresponding path program 4 times [2023-12-02 17:49:33,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:49:33,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058212939] [2023-12-02 17:49:33,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:49:33,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:49:34,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:49:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 10 proven. 59 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 17:49:52,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:49:52,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058212939] [2023-12-02 17:49:52,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058212939] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:49:52,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186245390] [2023-12-02 17:49:52,865 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:49:52,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:49:52,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:49:52,866 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:49:52,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 17:49:52,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:49:52,968 WARN L260 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 103 conjunts are in the unsatisfiable core [2023-12-02 17:49:52,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:49:54,185 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:49:54,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 209 treesize of output 152 [2023-12-02 17:49:56,648 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:49:56,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 395 treesize of output 285 [2023-12-02 17:49:57,235 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:49:57,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 375 treesize of output 285 [2023-12-02 17:49:57,773 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:49:57,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 399 treesize of output 302 [2023-12-02 17:49:59,013 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:49:59,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 559 treesize of output 391 [2023-12-02 17:49:59,290 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 66 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 17:49:59,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:50:26,200 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:50:26,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 304 treesize of output 1 [2023-12-02 17:50:31,884 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:50:31,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 3239 treesize of output 2719 [2023-12-02 17:50:35,051 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:50:35,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 2508 treesize of output 2033 [2023-12-02 17:50:39,009 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 17:50:39,015 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 17:50:39,016 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 17:50:39,016 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 17:50:39,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:50:39,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:50:39,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 2141 treesize of output 1613 [2023-12-02 17:50:39,133 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 17:50:39,138 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 17:50:39,138 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 17:50:39,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 1646 treesize of output 1276 [2023-12-02 17:50:39,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 796 treesize of output 748 [2023-12-02 17:50:39,466 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 5 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 17:50:39,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186245390] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:50:39,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [496996087] [2023-12-02 17:50:39,468 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 17:50:39,468 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:50:39,469 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:50:39,469 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:50:39,469 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:50:40,707 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 14 for LOIs [2023-12-02 17:50:40,738 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:50:47,963 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1363#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= ~N~0 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (or (and (exists ((v_sep_~ret~0_BEFORE_RETURN_23 Int) (v_sep_~i~0_148 Int)) (and (<= ~N~0 v_sep_~i~0_148) (or (= (mod v_sep_~ret~0_BEFORE_RETURN_23 4294967296) (+ |ULTIMATE.start_main_~ret5~0#1| 4294967296)) (= |ULTIMATE.start_main_~ret5~0#1| (mod v_sep_~ret~0_BEFORE_RETURN_23 4294967296))))) (exists ((|v_#memory_int_67| (Array Int (Array Int Int)))) (= (store |v_#memory_int_67| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_67| |ULTIMATE.start_main_~#x~0#1.base|) (+ (* ~N~0 4) (- 4)) |ULTIMATE.start_main_~temp~0#1|)) |#memory_int|))) (and (exists ((|v_#memory_int_67| (Array Int (Array Int Int)))) (= (store |v_#memory_int_67| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_67| |ULTIMATE.start_main_~#x~0#1.base|) (+ (* ~N~0 4) (- 4)) |ULTIMATE.start_main_~temp~0#1|)) |#memory_int|)) (exists ((v_sep_~ret~0_BEFORE_RETURN_24 Int) (v_sep_~i~0_148 Int)) (and (or (= |ULTIMATE.start_main_~ret5~0#1| (mod v_sep_~ret~0_BEFORE_RETURN_24 4294967296)) (= (+ |ULTIMATE.start_main_~ret5~0#1| 4294967296) (mod v_sep_~ret~0_BEFORE_RETURN_24 4294967296))) (<= ~N~0 v_sep_~i~0_148))))) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 2 ~N~0) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647))' at error location [2023-12-02 17:50:47,963 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:50:47,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:50:47,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 26] total 68 [2023-12-02 17:50:47,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22946578] [2023-12-02 17:50:47,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:50:47,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-12-02 17:50:47,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:50:47,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-12-02 17:50:47,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=6105, Unknown=3, NotChecked=0, Total=6480 [2023-12-02 17:50:47,967 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 68 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 58 states have internal predecessors, (65), 9 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 17:50:56,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:50:56,078 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2023-12-02 17:50:56,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-02 17:50:56,079 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 58 states have internal predecessors, (65), 9 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 31 [2023-12-02 17:50:56,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:50:56,080 INFO L225 Difference]: With dead ends: 58 [2023-12-02 17:50:56,080 INFO L226 Difference]: Without dead ends: 54 [2023-12-02 17:50:56,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3138 ImplicationChecksByTransitivity, 29.2s TimeCoverageRelationStatistics Valid=541, Invalid=8012, Unknown=3, NotChecked=0, Total=8556 [2023-12-02 17:50:56,083 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 62 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:50:56,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 171 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1028 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-12-02 17:50:56,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-12-02 17:50:56,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 44. [2023-12-02 17:50:56,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 35 states have internal predecessors, (44), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2023-12-02 17:50:56,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 61 transitions. [2023-12-02 17:50:56,100 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 61 transitions. Word has length 31 [2023-12-02 17:50:56,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:50:56,100 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 61 transitions. [2023-12-02 17:50:56,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 58 states have internal predecessors, (65), 9 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 17:50:56,100 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 61 transitions. [2023-12-02 17:50:56,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 17:50:56,101 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:50:56,101 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:50:56,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 17:50:56,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-02 17:50:56,302 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:50:56,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:50:56,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1827124134, now seen corresponding path program 5 times [2023-12-02 17:50:56,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:50:56,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129509936] [2023-12-02 17:50:56,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:50:56,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:50:56,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:50:56,463 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 27 proven. 47 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 17:50:56,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:50:56,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129509936] [2023-12-02 17:50:56,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129509936] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:50:56,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132651397] [2023-12-02 17:50:56,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:50:56,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:50:56,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:50:56,465 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:50:56,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 17:50:56,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 17:50:56,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:50:56,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 17:50:56,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:50:56,670 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 17:50:56,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:50:56,831 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 52 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 17:50:56,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132651397] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:50:56,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1814512648] [2023-12-02 17:50:56,833 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 17:50:56,833 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:50:56,833 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:50:56,833 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:50:56,833 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:50:58,167 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 14 for LOIs [2023-12-02 17:50:58,202 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:51:01,109 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1771#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (and (exists ((v_sep_~i~0_189 Int) (v_sep_~ret~0_BEFORE_RETURN_29 Int)) (and (<= ~N~0 v_sep_~i~0_189) (or (= (mod v_sep_~ret~0_BEFORE_RETURN_29 4294967296) (+ |ULTIMATE.start_main_~ret5~0#1| 4294967296)) (= |ULTIMATE.start_main_~ret5~0#1| (mod v_sep_~ret~0_BEFORE_RETURN_29 4294967296))))) (exists ((|v_#memory_int_74| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_74| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_74| |ULTIMATE.start_main_~#x~0#1.base|) (+ (* ~N~0 4) (- 4)) |ULTIMATE.start_main_~temp~0#1|))))) (and (exists ((v_sep_~ret~0_BEFORE_RETURN_30 Int) (v_sep_~i~0_189 Int)) (and (<= ~N~0 v_sep_~i~0_189) (or (= |ULTIMATE.start_main_~ret5~0#1| (mod v_sep_~ret~0_BEFORE_RETURN_30 4294967296)) (= (mod v_sep_~ret~0_BEFORE_RETURN_30 4294967296) (+ |ULTIMATE.start_main_~ret5~0#1| 4294967296))))) (exists ((|v_#memory_int_74| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_74| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_74| |ULTIMATE.start_main_~#x~0#1.base|) (+ (* ~N~0 4) (- 4)) |ULTIMATE.start_main_~temp~0#1|)))))) (<= ~N~0 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 2 ~N~0) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647))' at error location [2023-12-02 17:51:01,109 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:51:01,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:51:01,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 22 [2023-12-02 17:51:01,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615695193] [2023-12-02 17:51:01,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:51:01,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-02 17:51:01,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:51:01,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-02 17:51:01,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1048, Unknown=2, NotChecked=0, Total=1190 [2023-12-02 17:51:01,111 INFO L87 Difference]: Start difference. First operand 44 states and 61 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 17:51:01,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:51:01,454 INFO L93 Difference]: Finished difference Result 74 states and 97 transitions. [2023-12-02 17:51:01,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-02 17:51:01,455 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 32 [2023-12-02 17:51:01,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:51:01,456 INFO L225 Difference]: With dead ends: 74 [2023-12-02 17:51:01,456 INFO L226 Difference]: Without dead ends: 48 [2023-12-02 17:51:01,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=324, Invalid=2430, Unknown=2, NotChecked=0, Total=2756 [2023-12-02 17:51:01,458 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 43 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:51:01,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 213 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:51:01,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-12-02 17:51:01,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2023-12-02 17:51:01,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 35 states have internal predecessors, (40), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 17:51:01,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2023-12-02 17:51:01,475 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 32 [2023-12-02 17:51:01,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:51:01,476 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2023-12-02 17:51:01,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 17:51:01,476 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2023-12-02 17:51:01,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-02 17:51:01,477 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:51:01,478 INFO L195 NwaCegarLoop]: trace histogram [9, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:51:01,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 17:51:01,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-12-02 17:51:01,678 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:51:01,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:51:01,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1767439334, now seen corresponding path program 6 times [2023-12-02 17:51:01,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:51:01,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592103598] [2023-12-02 17:51:01,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:51:01,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:51:01,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:51:01,836 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 17:51:01,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:51:01,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592103598] [2023-12-02 17:51:01,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592103598] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:51:01,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309128611] [2023-12-02 17:51:01,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:51:01,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:51:01,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:51:01,838 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:51:01,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 17:51:01,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:51:01,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:51:01,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 17:51:01,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:51:02,062 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 58 proven. 22 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 17:51:02,062 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:51:02,190 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 17:51:02,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309128611] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:51:02,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1694739409] [2023-12-02 17:51:02,192 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 17:51:02,193 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:51:02,193 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:51:02,193 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:51:02,193 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:51:03,464 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 14 for LOIs [2023-12-02 17:51:03,498 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:51:06,375 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2252#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= ~N~0 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (or (and (exists ((v_sep_~i~0_230 Int) (v_sep_~ret~0_BEFORE_RETURN_35 Int)) (and (or (= |ULTIMATE.start_main_~ret5~0#1| (mod v_sep_~ret~0_BEFORE_RETURN_35 4294967296)) (= (mod v_sep_~ret~0_BEFORE_RETURN_35 4294967296) (+ |ULTIMATE.start_main_~ret5~0#1| 4294967296))) (<= ~N~0 v_sep_~i~0_230))) (exists ((|v_#memory_int_86| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_86| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_86| |ULTIMATE.start_main_~#x~0#1.base|) (+ (* ~N~0 4) (- 4)) |ULTIMATE.start_main_~temp~0#1|))))) (and (exists ((v_sep_~i~0_230 Int) (v_sep_~ret~0_BEFORE_RETURN_36 Int)) (and (or (= (mod v_sep_~ret~0_BEFORE_RETURN_36 4294967296) (+ |ULTIMATE.start_main_~ret5~0#1| 4294967296)) (= |ULTIMATE.start_main_~ret5~0#1| (mod v_sep_~ret~0_BEFORE_RETURN_36 4294967296))) (<= ~N~0 v_sep_~i~0_230))) (exists ((|v_#memory_int_86| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_86| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_86| |ULTIMATE.start_main_~#x~0#1.base|) (+ (* ~N~0 4) (- 4)) |ULTIMATE.start_main_~temp~0#1|)))))) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 2 ~N~0) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647))' at error location [2023-12-02 17:51:06,376 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:51:06,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:51:06,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 28 [2023-12-02 17:51:06,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151743803] [2023-12-02 17:51:06,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:51:06,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-02 17:51:06,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:51:06,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-02 17:51:06,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1407, Unknown=2, NotChecked=0, Total=1640 [2023-12-02 17:51:06,378 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 17:51:06,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:51:06,764 INFO L93 Difference]: Finished difference Result 89 states and 108 transitions. [2023-12-02 17:51:06,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-02 17:51:06,764 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 35 [2023-12-02 17:51:06,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:51:06,765 INFO L225 Difference]: With dead ends: 89 [2023-12-02 17:51:06,765 INFO L226 Difference]: Without dead ends: 53 [2023-12-02 17:51:06,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1162 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=460, Invalid=2844, Unknown=2, NotChecked=0, Total=3306 [2023-12-02 17:51:06,768 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 19 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:51:06,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 74 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:51:06,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-12-02 17:51:06,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 42. [2023-12-02 17:51:06,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 17:51:06,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2023-12-02 17:51:06,779 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 35 [2023-12-02 17:51:06,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:51:06,780 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2023-12-02 17:51:06,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 17:51:06,780 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2023-12-02 17:51:06,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-02 17:51:06,781 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:51:06,781 INFO L195 NwaCegarLoop]: trace histogram [12, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:51:06,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 17:51:06,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-02 17:51:06,982 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:51:06,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:51:06,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1323556373, now seen corresponding path program 7 times [2023-12-02 17:51:06,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:51:06,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102858462] [2023-12-02 17:51:06,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:51:06,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:51:07,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:52:05,157 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 2 proven. 102 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 17:52:05,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:52:05,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102858462] [2023-12-02 17:52:05,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102858462] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:52:05,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759310196] [2023-12-02 17:52:05,157 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:52:05,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:52:05,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:52:05,158 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:52:05,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 17:52:05,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:52:05,379 WARN L260 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 119 conjunts are in the unsatisfiable core [2023-12-02 17:52:05,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:52:07,889 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:52:07,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 411 treesize of output 297 [2023-12-02 17:52:13,720 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:52:13,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 799 treesize of output 568 [2023-12-02 17:52:15,161 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:52:15,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 739 treesize of output 568 [2023-12-02 17:52:16,551 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:52:16,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 739 treesize of output 568 [2023-12-02 17:52:17,954 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:52:17,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 803 treesize of output 625 [2023-12-02 17:52:21,002 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:52:21,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1165 treesize of output 805 [2023-12-02 17:52:21,448 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 5 proven. 106 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 17:52:21,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:53:48,721 WARN L293 SmtUtils]: Spent 5.04s on a formula simplification that was a NOOP. DAG size: 337 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:54:39,191 WARN L293 SmtUtils]: Spent 10.65s on a formula simplification that was a NOOP. DAG size: 402 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:54:42,631 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:54:42,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 559 treesize of output 1 [2023-12-02 17:55:17,488 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:55:17,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18075 treesize of output 15043 [2023-12-02 17:55:39,598 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:55:39,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 11674 treesize of output 8986 [2023-12-02 17:55:39,983 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:55:39,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 4790 treesize of output 4686 [2023-12-02 17:55:40,794 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:55:40,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 11687 treesize of output 9105 [2023-12-02 17:56:14,978 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 17:56:14,982 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 17:56:14,987 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 17:56:14,987 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 17:56:14,988 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 17:56:14,988 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 17:56:14,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:56:14,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:56:14,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:56:14,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 8542 treesize of output 6294 [2023-12-02 17:56:15,345 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 6 proven. 108 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 17:56:15,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759310196] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:56:15,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [653759549] [2023-12-02 17:56:15,346 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 17:56:15,346 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:56:15,347 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:56:15,347 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:56:15,347 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:56:16,612 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 14 for LOIs [2023-12-02 17:56:16,640 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:56:23,979 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2803#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= ~N~0 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (or (and (exists ((|v_#memory_int_107| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_107| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_107| |ULTIMATE.start_main_~#x~0#1.base|) (+ (* ~N~0 4) (- 4)) |ULTIMATE.start_main_~temp~0#1|)))) (exists ((v_sep_~ret~0_BEFORE_RETURN_42 Int) (v_sep_~i~0_286 Int)) (and (or (= (mod v_sep_~ret~0_BEFORE_RETURN_42 4294967296) |ULTIMATE.start_main_~ret5~0#1|) (= (mod v_sep_~ret~0_BEFORE_RETURN_42 4294967296) (+ |ULTIMATE.start_main_~ret5~0#1| 4294967296))) (<= ~N~0 v_sep_~i~0_286)))) (and (exists ((v_sep_~ret~0_BEFORE_RETURN_41 Int) (v_sep_~i~0_286 Int)) (and (or (= |ULTIMATE.start_main_~ret5~0#1| (mod v_sep_~ret~0_BEFORE_RETURN_41 4294967296)) (= (mod v_sep_~ret~0_BEFORE_RETURN_41 4294967296) (+ |ULTIMATE.start_main_~ret5~0#1| 4294967296))) (<= ~N~0 v_sep_~i~0_286))) (exists ((|v_#memory_int_107| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_107| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_107| |ULTIMATE.start_main_~#x~0#1.base|) (+ (* ~N~0 4) (- 4)) |ULTIMATE.start_main_~temp~0#1|)))))) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 2 ~N~0) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647))' at error location [2023-12-02 17:56:23,979 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:56:23,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:56:23,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 27, 30] total 75 [2023-12-02 17:56:23,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722507107] [2023-12-02 17:56:23,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:56:23,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2023-12-02 17:56:23,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:56:23,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2023-12-02 17:56:23,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=7278, Unknown=2, NotChecked=0, Total=7656 [2023-12-02 17:56:23,985 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand has 75 states, 60 states have (on average 1.2) internal successors, (72), 65 states have internal predecessors, (72), 9 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 17:56:53,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:56:53,019 INFO L93 Difference]: Finished difference Result 84 states and 110 transitions. [2023-12-02 17:56:53,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-02 17:56:53,020 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 60 states have (on average 1.2) internal successors, (72), 65 states have internal predecessors, (72), 9 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 35 [2023-12-02 17:56:53,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:56:53,021 INFO L225 Difference]: With dead ends: 84 [2023-12-02 17:56:53,021 INFO L226 Difference]: Without dead ends: 80 [2023-12-02 17:56:53,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 38 SyntacticMatches, 10 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3490 ImplicationChecksByTransitivity, 88.1s TimeCoverageRelationStatistics Valid=573, Invalid=9525, Unknown=2, NotChecked=0, Total=10100 [2023-12-02 17:56:53,025 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 55 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 1544 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 1584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:56:53,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 205 Invalid, 1584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1544 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2023-12-02 17:56:53,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-12-02 17:56:53,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2023-12-02 17:56:53,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 57 states have (on average 1.263157894736842) internal successors, (72), 58 states have internal predecessors, (72), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2023-12-02 17:56:53,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 98 transitions. [2023-12-02 17:56:53,061 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 98 transitions. Word has length 35 [2023-12-02 17:56:53,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:56:53,061 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 98 transitions. [2023-12-02 17:56:53,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 60 states have (on average 1.2) internal successors, (72), 65 states have internal predecessors, (72), 9 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 17:56:53,062 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 98 transitions. [2023-12-02 17:56:53,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-02 17:56:53,063 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:56:53,063 INFO L195 NwaCegarLoop]: trace histogram [13, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:56:53,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 17:56:53,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:56:53,263 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:56:53,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:56:53,264 INFO L85 PathProgramCache]: Analyzing trace with hash -2021581621, now seen corresponding path program 8 times [2023-12-02 17:56:53,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:56:53,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459256801] [2023-12-02 17:56:53,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:56:53,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:56:53,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:56:53,412 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 41 proven. 71 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 17:56:53,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:56:53,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459256801] [2023-12-02 17:56:53,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459256801] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:56:53,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82020471] [2023-12-02 17:56:53,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:56:53,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:56:53,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:56:53,413 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:56:53,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 17:56:53,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-02 17:56:53,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:56:53,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 17:56:53,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:56:53,664 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 79 proven. 6 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-12-02 17:56:53,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:56:53,849 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 77 proven. 6 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-12-02 17:56:53,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82020471] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:56:53,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1177501685] [2023-12-02 17:56:53,851 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 17:56:53,851 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:56:53,851 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:56:53,851 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:56:53,851 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:56:55,090 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 14 for LOIs [2023-12-02 17:56:55,119 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:56:58,224 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3340#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= ~N~0 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 2 ~N~0) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (or (and (exists ((v_sep_~i~0_334 Int) (v_sep_~ret~0_BEFORE_RETURN_48 Int)) (and (or (= (mod v_sep_~ret~0_BEFORE_RETURN_48 4294967296) (+ |ULTIMATE.start_main_~ret5~0#1| 4294967296)) (= |ULTIMATE.start_main_~ret5~0#1| (mod v_sep_~ret~0_BEFORE_RETURN_48 4294967296))) (<= ~N~0 v_sep_~i~0_334))) (exists ((|v_#memory_int_116| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_116| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_116| |ULTIMATE.start_main_~#x~0#1.base|) (+ (* ~N~0 4) (- 4)) |ULTIMATE.start_main_~temp~0#1|))))) (and (exists ((v_sep_~i~0_334 Int) (v_sep_~ret~0_BEFORE_RETURN_47 Int)) (and (<= ~N~0 v_sep_~i~0_334) (or (= |ULTIMATE.start_main_~ret5~0#1| (mod v_sep_~ret~0_BEFORE_RETURN_47 4294967296)) (= (+ |ULTIMATE.start_main_~ret5~0#1| 4294967296) (mod v_sep_~ret~0_BEFORE_RETURN_47 4294967296))))) (exists ((|v_#memory_int_116| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_116| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_116| |ULTIMATE.start_main_~#x~0#1.base|) (+ (* ~N~0 4) (- 4)) |ULTIMATE.start_main_~temp~0#1|)))))))' at error location [2023-12-02 17:56:58,225 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:56:58,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:56:58,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 27 [2023-12-02 17:56:58,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115175999] [2023-12-02 17:56:58,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:56:58,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-02 17:56:58,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:56:58,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-02 17:56:58,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1374, Unknown=2, NotChecked=0, Total=1560 [2023-12-02 17:56:58,227 INFO L87 Difference]: Start difference. First operand 70 states and 98 transitions. Second operand has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 17:56:58,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:56:58,625 INFO L93 Difference]: Finished difference Result 108 states and 146 transitions. [2023-12-02 17:56:58,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-02 17:56:58,626 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 36 [2023-12-02 17:56:58,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:56:58,627 INFO L225 Difference]: With dead ends: 108 [2023-12-02 17:56:58,627 INFO L226 Difference]: Without dead ends: 50 [2023-12-02 17:56:58,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 76 SyntacticMatches, 6 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1146 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=458, Invalid=3446, Unknown=2, NotChecked=0, Total=3906 [2023-12-02 17:56:58,630 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 42 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:56:58,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 90 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:56:58,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-12-02 17:56:58,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2023-12-02 17:56:58,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 17:56:58,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2023-12-02 17:56:58,647 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 36 [2023-12-02 17:56:58,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:56:58,647 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2023-12-02 17:56:58,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 17:56:58,648 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2023-12-02 17:56:58,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-02 17:56:58,649 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:56:58,649 INFO L195 NwaCegarLoop]: trace histogram [15, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:56:58,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 17:56:58,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6945b1-6b40-4574-b566-e87b84692a07/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:56:58,849 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:56:58,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:56:58,850 INFO L85 PathProgramCache]: Analyzing trace with hash -40835130, now seen corresponding path program 9 times [2023-12-02 17:56:58,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:56:58,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525661889] [2023-12-02 17:56:58,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:56:58,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:56:59,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat