./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_two_index_09.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_two_index_09.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX --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 c10901f6cd435bfce49587e6dcf9dfedb0e3885a1bcbcf1013c88383e8232647 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:42:44,682 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:42:44,798 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:42:44,802 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:42:44,803 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:42:44,830 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:42:44,830 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:42:44,831 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:42:44,832 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:42:44,838 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:42:44,838 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:42:44,839 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:42:44,839 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:42:44,841 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:42:44,842 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:42:44,843 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:42:44,843 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:42:44,844 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:42:44,845 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:42:44,845 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:42:44,847 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:42:44,848 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:42:44,849 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:42:44,849 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:42:44,850 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:42:44,850 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:42:44,851 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:42:44,851 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:42:44,852 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:42:44,852 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:42:44,853 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:42:44,853 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:42:44,854 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:42:44,854 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:42:44,854 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:42:44,855 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:42:44,855 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:42:44,856 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:42:44,856 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:42:44,857 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:42:44,857 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:42:44,858 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:42:44,858 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:42:44,858 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:42:44,859 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:42:44,859 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_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c10901f6cd435bfce49587e6dcf9dfedb0e3885a1bcbcf1013c88383e8232647 [2023-11-12 00:42:45,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:42:45,190 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:42:45,193 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:42:45,195 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:42:45,195 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:42:45,198 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/array-examples/standard_two_index_09.i [2023-11-12 00:42:48,468 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:42:48,804 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:42:48,805 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/sv-benchmarks/c/array-examples/standard_two_index_09.i [2023-11-12 00:42:48,814 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/data/682041b31/e7fb49fedd19453b9816e80dffd3dd67/FLAG4c2eae5da [2023-11-12 00:42:48,836 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/data/682041b31/e7fb49fedd19453b9816e80dffd3dd67 [2023-11-12 00:42:48,839 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:42:48,841 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:42:48,842 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:42:48,842 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:42:48,850 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:42:48,851 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:42:48" (1/1) ... [2023-11-12 00:42:48,852 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64c46adc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:42:48, skipping insertion in model container [2023-11-12 00:42:48,852 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:42:48" (1/1) ... [2023-11-12 00:42:48,878 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:42:49,034 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_2bcc9a48-7514-4100-b2a6-4325227a1d9c/sv-benchmarks/c/array-examples/standard_two_index_09.i[814,827] [2023-11-12 00:42:49,053 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:42:49,065 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:42:49,081 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_2bcc9a48-7514-4100-b2a6-4325227a1d9c/sv-benchmarks/c/array-examples/standard_two_index_09.i[814,827] [2023-11-12 00:42:49,099 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:42:49,120 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:42:49,120 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:42:49 WrapperNode [2023-11-12 00:42:49,121 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:42:49,122 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:42:49,122 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:42:49,122 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:42:49,130 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:42:49" (1/1) ... [2023-11-12 00:42:49,137 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:42:49" (1/1) ... [2023-11-12 00:42:49,160 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2023-11-12 00:42:49,161 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:42:49,162 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:42:49,162 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:42:49,162 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:42:49,172 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:42:49" (1/1) ... [2023-11-12 00:42:49,172 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:42:49" (1/1) ... [2023-11-12 00:42:49,174 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:42:49" (1/1) ... [2023-11-12 00:42:49,175 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:42:49" (1/1) ... [2023-11-12 00:42:49,181 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:42:49" (1/1) ... [2023-11-12 00:42:49,185 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:42:49" (1/1) ... [2023-11-12 00:42:49,186 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:42:49" (1/1) ... [2023-11-12 00:42:49,187 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:42:49" (1/1) ... [2023-11-12 00:42:49,190 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:42:49,191 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:42:49,191 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:42:49,191 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:42:49,192 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:42:49" (1/1) ... [2023-11-12 00:42:49,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:42:49,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:42:49,240 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:42:49,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:42:49,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:42:49,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:42:49,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:42:49,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:42:49,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:42:49,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:42:49,283 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:42:49,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:42:49,364 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:42:49,366 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:42:49,544 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:42:49,585 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:42:49,586 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-12 00:42:49,589 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:42:49 BoogieIcfgContainer [2023-11-12 00:42:49,589 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:42:49,592 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:42:49,592 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:42:49,596 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:42:49,597 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:42:48" (1/3) ... [2023-11-12 00:42:49,598 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6208600 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:42:49, skipping insertion in model container [2023-11-12 00:42:49,598 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:42:49" (2/3) ... [2023-11-12 00:42:49,599 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6208600 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:42:49, skipping insertion in model container [2023-11-12 00:42:49,599 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:42:49" (3/3) ... [2023-11-12 00:42:49,601 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_two_index_09.i [2023-11-12 00:42:49,627 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:42:49,628 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:42:49,690 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:42:49,699 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;@52cf0dfa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:42:49,699 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:42:49,704 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:49,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-12 00:42:49,712 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:42:49,713 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 00:42:49,714 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:42:49,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:42:49,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1745982706, now seen corresponding path program 1 times [2023-11-12 00:42:49,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:42:49,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295759399] [2023-11-12 00:42:49,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:42:49,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:42:49,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:42:50,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:42:50,118 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:42:50,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295759399] [2023-11-12 00:42:50,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295759399] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:42:50,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:42:50,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:42:50,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094502678] [2023-11-12 00:42:50,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:42:50,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:42:50,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:42:50,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:42:50,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:42:50,162 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:50,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:42:50,246 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2023-11-12 00:42:50,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:42:50,249 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-12 00:42:50,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:42:50,261 INFO L225 Difference]: With dead ends: 17 [2023-11-12 00:42:50,262 INFO L226 Difference]: Without dead ends: 9 [2023-11-12 00:42:50,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:42:50,279 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:42:50,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:42:50,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2023-11-12 00:42:50,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2023-11-12 00:42:50,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:50,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2023-11-12 00:42:50,327 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2023-11-12 00:42:50,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:42:50,329 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2023-11-12 00:42:50,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:50,329 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2023-11-12 00:42:50,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-12 00:42:50,330 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:42:50,330 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:42:50,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:42:50,331 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:42:50,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:42:50,333 INFO L85 PathProgramCache]: Analyzing trace with hash 276578033, now seen corresponding path program 1 times [2023-11-12 00:42:50,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:42:50,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700174569] [2023-11-12 00:42:50,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:42:50,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:42:50,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:42:50,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:42:50,512 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:42:50,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700174569] [2023-11-12 00:42:50,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700174569] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:42:50,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061555037] [2023-11-12 00:42:50,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:42:50,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:42:50,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:42:50,543 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:42:50,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:42:50,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:42:50,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:42:50,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:42:50,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:42:50,687 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:42:50,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061555037] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:42:50,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:42:50,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-11-12 00:42:50,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649831736] [2023-11-12 00:42:50,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:42:50,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:42:50,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:42:50,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:42:50,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:42:50,693 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:50,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:42:50,725 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2023-11-12 00:42:50,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:42:50,726 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-12 00:42:50,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:42:50,728 INFO L225 Difference]: With dead ends: 20 [2023-11-12 00:42:50,728 INFO L226 Difference]: Without dead ends: 15 [2023-11-12 00:42:50,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:42:50,731 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:42:50,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:42:50,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-12 00:42:50,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 10. [2023-11-12 00:42:50,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:50,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2023-11-12 00:42:50,738 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2023-11-12 00:42:50,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:42:50,739 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2023-11-12 00:42:50,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:50,739 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2023-11-12 00:42:50,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-12 00:42:50,740 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:42:50,741 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:42:50,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:42:50,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:42:50,943 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:42:50,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:42:50,944 INFO L85 PathProgramCache]: Analyzing trace with hash -51261225, now seen corresponding path program 1 times [2023-11-12 00:42:50,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:42:50,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28668150] [2023-11-12 00:42:50,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:42:50,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:42:50,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:42:51,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:42:51,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:42:51,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28668150] [2023-11-12 00:42:51,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28668150] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:42:51,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520019605] [2023-11-12 00:42:51,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:42:51,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:42:51,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:42:51,049 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:42:51,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:42:51,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:42:51,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:42:51,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:42:51,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:42:51,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:42:51,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:42:51,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520019605] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:42:51,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1221604926] [2023-11-12 00:42:51,190 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-12 00:42:51,191 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:42:51,195 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:42:51,201 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:42:51,201 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:42:51,935 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:42:52,162 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '164#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (not (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|)) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 4) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2023-11-12 00:42:52,162 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:42:52,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:42:52,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-12 00:42:52,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328704673] [2023-11-12 00:42:52,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:42:52,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:42:52,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:42:52,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:42:52,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2023-11-12 00:42:52,167 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:52,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:42:52,221 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2023-11-12 00:42:52,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:42:52,222 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-12 00:42:52,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:42:52,223 INFO L225 Difference]: With dead ends: 31 [2023-11-12 00:42:52,223 INFO L226 Difference]: Without dead ends: 24 [2023-11-12 00:42:52,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2023-11-12 00:42:52,228 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:42:52,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 12 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:42:52,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-12 00:42:52,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 14. [2023-11-12 00:42:52,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:52,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2023-11-12 00:42:52,241 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2023-11-12 00:42:52,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:42:52,241 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2023-11-12 00:42:52,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:52,242 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2023-11-12 00:42:52,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-12 00:42:52,243 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:42:52,243 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2023-11-12 00:42:52,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:42:52,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:42:52,455 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:42:52,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:42:52,456 INFO L85 PathProgramCache]: Analyzing trace with hash 490227022, now seen corresponding path program 2 times [2023-11-12 00:42:52,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:42:52,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509734100] [2023-11-12 00:42:52,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:42:52,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:42:52,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:42:52,661 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 00:42:52,661 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:42:52,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509734100] [2023-11-12 00:42:52,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509734100] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:42:52,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123954853] [2023-11-12 00:42:52,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:42:52,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:42:52,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:42:52,666 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:42:52,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:42:52,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 00:42:52,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:42:52,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 00:42:52,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:42:52,758 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 00:42:52,758 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:42:52,786 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 00:42:52,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123954853] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:42:52,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2105400189] [2023-11-12 00:42:52,789 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-12 00:42:52,789 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:42:52,789 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:42:52,790 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:42:52,790 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:42:53,134 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:42:53,319 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '312#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (not (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|)) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 4) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2023-11-12 00:42:53,320 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:42:53,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:42:53,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-11-12 00:42:53,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292130006] [2023-11-12 00:42:53,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:42:53,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 00:42:53,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:42:53,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 00:42:53,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2023-11-12 00:42:53,324 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:53,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:42:53,427 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2023-11-12 00:42:53,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 00:42:53,428 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-12 00:42:53,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:42:53,432 INFO L225 Difference]: With dead ends: 54 [2023-11-12 00:42:53,432 INFO L226 Difference]: Without dead ends: 46 [2023-11-12 00:42:53,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2023-11-12 00:42:53,438 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 44 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:42:53,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 18 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:42:53,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-12 00:42:53,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 20. [2023-11-12 00:42:53,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:53,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2023-11-12 00:42:53,457 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2023-11-12 00:42:53,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:42:53,457 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2023-11-12 00:42:53,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:53,458 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2023-11-12 00:42:53,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-12 00:42:53,461 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:42:53,461 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2023-11-12 00:42:53,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:42:53,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:42:53,668 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:42:53,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:42:53,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1077845166, now seen corresponding path program 3 times [2023-11-12 00:42:53,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:42:53,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711117395] [2023-11-12 00:42:53,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:42:53,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:42:53,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:42:53,960 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-12 00:42:53,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:42:53,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711117395] [2023-11-12 00:42:53,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711117395] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:42:53,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667027260] [2023-11-12 00:42:53,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 00:42:53,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:42:53,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:42:53,970 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:42:53,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:42:54,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 00:42:54,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:42:54,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 00:42:54,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:42:54,192 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-12 00:42:54,192 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:42:54,326 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-12 00:42:54,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667027260] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:42:54,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [938496411] [2023-11-12 00:42:54,331 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-12 00:42:54,332 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:42:54,332 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:42:54,332 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:42:54,333 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:42:54,643 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:42:54,902 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '556#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (not (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|)) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 4) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2023-11-12 00:42:54,903 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:42:54,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:42:54,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2023-11-12 00:42:54,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796414246] [2023-11-12 00:42:54,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:42:54,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-12 00:42:54,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:42:54,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-12 00:42:54,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=425, Unknown=0, NotChecked=0, Total=756 [2023-11-12 00:42:54,909 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:55,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:42:55,099 INFO L93 Difference]: Finished difference Result 88 states and 107 transitions. [2023-11-12 00:42:55,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-12 00:42:55,100 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-12 00:42:55,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:42:55,103 INFO L225 Difference]: With dead ends: 88 [2023-11-12 00:42:55,104 INFO L226 Difference]: Without dead ends: 76 [2023-11-12 00:42:55,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=331, Invalid=425, Unknown=0, NotChecked=0, Total=756 [2023-11-12 00:42:55,108 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 79 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:42:55,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 42 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:42:55,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-12 00:42:55,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 36. [2023-11-12 00:42:55,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:55,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2023-11-12 00:42:55,126 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 18 [2023-11-12 00:42:55,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:42:55,127 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2023-11-12 00:42:55,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:55,127 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2023-11-12 00:42:55,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-12 00:42:55,129 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:42:55,129 INFO L195 NwaCegarLoop]: trace histogram [20, 8, 1, 1, 1, 1, 1, 1] [2023-11-12 00:42:55,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:42:55,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:42:55,337 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:42:55,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:42:55,337 INFO L85 PathProgramCache]: Analyzing trace with hash -936889138, now seen corresponding path program 4 times [2023-11-12 00:42:55,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:42:55,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100392487] [2023-11-12 00:42:55,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:42:55,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:42:55,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:42:55,711 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-11-12 00:42:55,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:42:55,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100392487] [2023-11-12 00:42:55,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100392487] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:42:55,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855192725] [2023-11-12 00:42:55,712 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 00:42:55,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:42:55,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:42:55,713 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:42:55,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:42:55,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:42:55,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-12 00:42:55,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:42:56,094 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-12 00:42:56,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:42:56,734 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-12 00:42:56,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855192725] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:42:56,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1817660260] [2023-11-12 00:42:56,737 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-12 00:42:56,737 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:42:56,738 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:42:56,738 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:42:56,738 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:42:56,984 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:42:57,229 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1012#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (not (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|)) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 4) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2023-11-12 00:42:57,229 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:42:57,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:42:57,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 22, 22] total 51 [2023-11-12 00:42:57,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701663775] [2023-11-12 00:42:57,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:42:57,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-12 00:42:57,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:42:57,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-12 00:42:57,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1437, Invalid=1643, Unknown=0, NotChecked=0, Total=3080 [2023-11-12 00:42:57,237 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 51 states, 51 states have (on average 1.196078431372549) internal successors, (61), 51 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:57,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:42:57,514 INFO L93 Difference]: Finished difference Result 142 states and 177 transitions. [2023-11-12 00:42:57,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-12 00:42:57,515 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.196078431372549) internal successors, (61), 51 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-11-12 00:42:57,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:42:57,517 INFO L225 Difference]: With dead ends: 142 [2023-11-12 00:42:57,517 INFO L226 Difference]: Without dead ends: 128 [2023-11-12 00:42:57,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1697 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1437, Invalid=1643, Unknown=0, NotChecked=0, Total=3080 [2023-11-12 00:42:57,520 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 199 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:42:57,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 72 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:42:57,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-11-12 00:42:57,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 68. [2023-11-12 00:42:57,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:57,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2023-11-12 00:42:57,532 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 34 [2023-11-12 00:42:57,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:42:57,533 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2023-11-12 00:42:57,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.196078431372549) internal successors, (61), 51 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:42:57,533 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2023-11-12 00:42:57,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-12 00:42:57,536 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:42:57,536 INFO L195 NwaCegarLoop]: trace histogram [48, 12, 1, 1, 1, 1, 1, 1] [2023-11-12 00:42:57,547 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-12 00:42:57,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:42:57,746 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:42:57,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:42:57,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1875309298, now seen corresponding path program 5 times [2023-11-12 00:42:57,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:42:57,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952954258] [2023-11-12 00:42:57,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:42:57,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:42:57,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:42:58,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2023-11-12 00:42:58,470 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:42:58,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952954258] [2023-11-12 00:42:58,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952954258] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:42:58,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542812281] [2023-11-12 00:42:58,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:42:58,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:42:58,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:42:58,472 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:42:58,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 00:43:01,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-12 00:43:01,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:43:01,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 00:43:01,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:43:01,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2023-11-12 00:43:01,513 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:43:01,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2023-11-12 00:43:01,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542812281] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:43:01,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [291550718] [2023-11-12 00:43:01,829 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-12 00:43:01,829 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:43:01,830 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:43:01,830 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:43:01,835 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:43:02,099 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:43:02,265 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1794#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (not (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|)) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 4) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2023-11-12 00:43:02,266 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:43:02,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:43:02,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2023-11-12 00:43:02,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174994356] [2023-11-12 00:43:02,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:43:02,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-12 00:43:02,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:43:02,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-12 00:43:02,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=616, Unknown=0, NotChecked=0, Total=1122 [2023-11-12 00:43:02,271 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:43:02,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:43:02,534 INFO L93 Difference]: Finished difference Result 213 states and 229 transitions. [2023-11-12 00:43:02,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-12 00:43:02,535 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2023-11-12 00:43:02,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:43:02,537 INFO L225 Difference]: With dead ends: 213 [2023-11-12 00:43:02,537 INFO L226 Difference]: Without dead ends: 208 [2023-11-12 00:43:02,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=506, Invalid=616, Unknown=0, NotChecked=0, Total=1122 [2023-11-12 00:43:02,539 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 304 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:43:02,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 78 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:43:02,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2023-11-12 00:43:02,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 82. [2023-11-12 00:43:02,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.037037037037037) internal successors, (84), 81 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:43:02,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2023-11-12 00:43:02,551 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 66 [2023-11-12 00:43:02,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:43:02,551 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2023-11-12 00:43:02,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:43:02,552 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2023-11-12 00:43:02,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-11-12 00:43:02,553 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:43:02,553 INFO L195 NwaCegarLoop]: trace histogram [48, 26, 1, 1, 1, 1, 1, 1] [2023-11-12 00:43:02,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 00:43:02,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:43:02,762 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:43:02,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:43:02,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1291366514, now seen corresponding path program 6 times [2023-11-12 00:43:02,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:43:02,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429919929] [2023-11-12 00:43:02,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:43:02,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:43:02,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:43:04,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1527 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2023-11-12 00:43:04,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:43:04,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429919929] [2023-11-12 00:43:04,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429919929] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:43:04,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106721072] [2023-11-12 00:43:04,232 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 00:43:04,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:43:04,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:43:04,236 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:43:04,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 00:43:04,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 00:43:04,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:43:04,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-12 00:43:04,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:43:05,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1527 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2023-11-12 00:43:05,150 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:43:08,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1527 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2023-11-12 00:43:08,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106721072] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:43:08,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1820561267] [2023-11-12 00:43:08,173 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-12 00:43:08,174 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:43:08,174 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:43:08,174 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:43:08,174 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:43:08,405 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:43:08,668 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2871#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (not (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|)) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 4) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2023-11-12 00:43:08,668 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:43:08,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:43:08,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 50, 50] total 122 [2023-11-12 00:43:08,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893025289] [2023-11-12 00:43:08,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:43:08,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2023-11-12 00:43:08,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:43:08,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2023-11-12 00:43:08,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7756, Invalid=8246, Unknown=0, NotChecked=0, Total=16002 [2023-11-12 00:43:08,717 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand has 122 states, 122 states have (on average 1.1065573770491803) internal successors, (135), 122 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:43:10,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:43:10,337 INFO L93 Difference]: Finished difference Result 357 states and 438 transitions. [2023-11-12 00:43:10,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2023-11-12 00:43:10,338 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 1.1065573770491803) internal successors, (135), 122 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2023-11-12 00:43:10,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:43:10,348 INFO L225 Difference]: With dead ends: 357 [2023-11-12 00:43:10,348 INFO L226 Difference]: Without dead ends: 325 [2023-11-12 00:43:10,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9039 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=7756, Invalid=8246, Unknown=0, NotChecked=0, Total=16002 [2023-11-12 00:43:10,361 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 683 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:43:10,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [683 Valid, 174 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:43:10,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2023-11-12 00:43:10,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 160. [2023-11-12 00:43:10,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.0188679245283019) internal successors, (162), 159 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:43:10,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2023-11-12 00:43:10,403 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 80 [2023-11-12 00:43:10,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:43:10,405 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2023-11-12 00:43:10,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 1.1065573770491803) internal successors, (135), 122 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:43:10,406 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2023-11-12 00:43:10,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-11-12 00:43:10,418 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:43:10,419 INFO L195 NwaCegarLoop]: trace histogram [119, 33, 1, 1, 1, 1, 1, 1] [2023-11-12 00:43:10,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 00:43:10,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:43:10,628 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:43:10,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:43:10,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1019003145, now seen corresponding path program 7 times [2023-11-12 00:43:10,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:43:10,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080057572] [2023-11-12 00:43:10,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:43:10,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:43:10,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:43:13,580 INFO L134 CoverageAnalysis]: Checked inductivity of 7701 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 7140 trivial. 0 not checked. [2023-11-12 00:43:13,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:43:13,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080057572] [2023-11-12 00:43:13,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080057572] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:43:13,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731824307] [2023-11-12 00:43:13,581 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 00:43:13,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:43:13,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:43:13,583 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:43:13,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 00:43:14,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:43:14,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 1431 conjuncts, 121 conjunts are in the unsatisfiable core [2023-11-12 00:43:14,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:43:16,097 INFO L134 CoverageAnalysis]: Checked inductivity of 7701 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2023-11-12 00:43:16,097 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:43:26,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7701 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2023-11-12 00:43:26,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731824307] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:43:26,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [419175771] [2023-11-12 00:43:26,933 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-12 00:43:26,933 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:43:26,934 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:43:26,934 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:43:26,934 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:43:27,138 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:43:27,430 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4969#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (not (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|)) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 4) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2023-11-12 00:43:27,430 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:43:27,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:43:27,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 121, 121] total 263 [2023-11-12 00:43:27,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961061220] [2023-11-12 00:43:27,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:43:27,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 263 states [2023-11-12 00:43:27,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:43:27,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 263 interpolants. [2023-11-12 00:43:27,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35251, Invalid=36305, Unknown=0, NotChecked=0, Total=71556 [2023-11-12 00:43:27,460 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand has 263 states, 263 states have (on average 1.079847908745247) internal successors, (284), 263 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:43:34,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:43:34,344 INFO L93 Difference]: Finished difference Result 595 states and 754 transitions. [2023-11-12 00:43:34,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 263 states. [2023-11-12 00:43:34,345 INFO L78 Accepts]: Start accepts. Automaton has has 263 states, 263 states have (on average 1.079847908745247) internal successors, (284), 263 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2023-11-12 00:43:34,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:43:34,350 INFO L225 Difference]: With dead ends: 595 [2023-11-12 00:43:34,351 INFO L226 Difference]: Without dead ends: 556 [2023-11-12 00:43:34,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44361 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=35251, Invalid=36305, Unknown=0, NotChecked=0, Total=71556 [2023-11-12 00:43:34,359 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 983 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 00:43:34,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [983 Valid, 312 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 00:43:34,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2023-11-12 00:43:34,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 316. [2023-11-12 00:43:34,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 1.0095238095238095) internal successors, (318), 315 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:43:34,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 318 transitions. [2023-11-12 00:43:34,388 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 318 transitions. Word has length 158 [2023-11-12 00:43:34,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:43:34,388 INFO L495 AbstractCegarLoop]: Abstraction has 316 states and 318 transitions. [2023-11-12 00:43:34,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 263 states, 263 states have (on average 1.079847908745247) internal successors, (284), 263 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:43:34,389 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 318 transitions. [2023-11-12 00:43:34,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2023-11-12 00:43:34,394 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:43:34,394 INFO L195 NwaCegarLoop]: trace histogram [260, 48, 1, 1, 1, 1, 1, 1] [2023-11-12 00:43:34,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 00:43:34,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bcc9a48-7514-4100-b2a6-4325227a1d9c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:43:34,605 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:43:34,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:43:34,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1473634254, now seen corresponding path program 8 times [2023-11-12 00:43:34,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:43:34,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501168075] [2023-11-12 00:43:34,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:43:34,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:43:34,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat