./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/res2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 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_a975d02b-b0bf-40a8-8c66-883a5c7651d3/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a975d02b-b0bf-40a8-8c66-883a5c7651d3/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a975d02b-b0bf-40a8-8c66-883a5c7651d3/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a975d02b-b0bf-40a8-8c66-883a5c7651d3/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/res2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a975d02b-b0bf-40a8-8c66-883a5c7651d3/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a975d02b-b0bf-40a8-8c66-883a5c7651d3/bin/utaipan-verify-QoSU8krkJ5 --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 105e7597bd9cfde6146cefe87563ba1bc48309677fb8b2f1d1f421bc92453e6b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:41:10,702 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:41:10,813 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a975d02b-b0bf-40a8-8c66-883a5c7651d3/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-21 19:41:10,820 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:41:10,821 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:41:10,853 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:41:10,854 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:41:10,855 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:41:10,856 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:41:10,857 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:41:10,857 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:41:10,858 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:41:10,859 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:41:10,859 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 19:41:10,860 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:41:10,861 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:41:10,861 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 19:41:10,862 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 19:41:10,863 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:41:10,863 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 19:41:10,864 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 19:41:10,865 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 19:41:10,866 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:41:10,866 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 19:41:10,867 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 19:41:10,868 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:41:10,868 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 19:41:10,869 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:41:10,870 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 19:41:10,870 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:41:10,871 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 19:41:10,872 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 19:41:10,872 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 19:41:10,873 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:41:10,874 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:41:10,874 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:41:10,875 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:41:10,876 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:41:10,876 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:41:10,877 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:41:10,878 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 19:41:10,879 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 19:41:10,879 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 19:41:10,880 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:41:10,880 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 19:41:10,881 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:41:10,881 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:41:10,882 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_a975d02b-b0bf-40a8-8c66-883a5c7651d3/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a975d02b-b0bf-40a8-8c66-883a5c7651d3/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 105e7597bd9cfde6146cefe87563ba1bc48309677fb8b2f1d1f421bc92453e6b [2023-11-21 19:41:11,204 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:41:11,240 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:41:11,244 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:41:11,246 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:41:11,247 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:41:11,248 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a975d02b-b0bf-40a8-8c66-883a5c7651d3/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/array-fpi/res2.c [2023-11-21 19:41:14,759 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:41:15,044 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:41:15,045 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a975d02b-b0bf-40a8-8c66-883a5c7651d3/sv-benchmarks/c/array-fpi/res2.c [2023-11-21 19:41:15,053 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a975d02b-b0bf-40a8-8c66-883a5c7651d3/bin/utaipan-verify-QoSU8krkJ5/data/528120917/5c4cb9db844b46248cdf5c4d460259b9/FLAG29d239ba3 [2023-11-21 19:41:15,074 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a975d02b-b0bf-40a8-8c66-883a5c7651d3/bin/utaipan-verify-QoSU8krkJ5/data/528120917/5c4cb9db844b46248cdf5c4d460259b9 [2023-11-21 19:41:15,083 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:41:15,085 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:41:15,089 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:41:15,089 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:41:15,094 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:41:15,095 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:41:15" (1/1) ... [2023-11-21 19:41:15,097 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32a833a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:41:15, skipping insertion in model container [2023-11-21 19:41:15,097 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:41:15" (1/1) ... [2023-11-21 19:41:15,123 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:41:15,334 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_a975d02b-b0bf-40a8-8c66-883a5c7651d3/sv-benchmarks/c/array-fpi/res2.c[587,600] [2023-11-21 19:41:15,383 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:41:15,399 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:41:15,418 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_a975d02b-b0bf-40a8-8c66-883a5c7651d3/sv-benchmarks/c/array-fpi/res2.c[587,600] [2023-11-21 19:41:15,457 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:41:15,479 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:41:15,480 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:41:15 WrapperNode [2023-11-21 19:41:15,480 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:41:15,482 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:41:15,482 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:41:15,482 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:41:15,490 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:41:15" (1/1) ... [2023-11-21 19:41:15,510 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:41:15" (1/1) ... [2023-11-21 19:41:15,551 INFO L138 Inliner]: procedures = 17, calls = 36, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 120 [2023-11-21 19:41:15,552 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:41:15,553 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:41:15,553 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:41:15,554 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:41:15,566 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:41:15" (1/1) ... [2023-11-21 19:41:15,566 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:41:15" (1/1) ... [2023-11-21 19:41:15,573 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:41:15" (1/1) ... [2023-11-21 19:41:15,573 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:41:15" (1/1) ... [2023-11-21 19:41:15,593 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:41:15" (1/1) ... [2023-11-21 19:41:15,597 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:41:15" (1/1) ... [2023-11-21 19:41:15,599 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:41:15" (1/1) ... [2023-11-21 19:41:15,600 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:41:15" (1/1) ... [2023-11-21 19:41:15,603 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:41:15,604 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:41:15,605 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:41:15,605 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:41:15,606 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:41:15" (1/1) ... [2023-11-21 19:41:15,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:41:15,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a975d02b-b0bf-40a8-8c66-883a5c7651d3/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:41:15,644 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a975d02b-b0bf-40a8-8c66-883a5c7651d3/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:41:15,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a975d02b-b0bf-40a8-8c66-883a5c7651d3/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:41:15,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:41:15,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 19:41:15,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 19:41:15,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 19:41:15,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 19:41:15,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:41:15,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:41:15,701 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 19:41:15,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 19:41:15,785 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:41:15,788 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:41:16,059 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:41:16,146 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:41:16,146 INFO L308 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-21 19:41:16,148 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:41:16 BoogieIcfgContainer [2023-11-21 19:41:16,149 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:41:16,151 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:41:16,152 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:41:16,155 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:41:16,156 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:41:15" (1/3) ... [2023-11-21 19:41:16,157 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c817b09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:41:16, skipping insertion in model container [2023-11-21 19:41:16,157 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:41:15" (2/3) ... [2023-11-21 19:41:16,180 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c817b09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:41:16, skipping insertion in model container [2023-11-21 19:41:16,180 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:41:16" (3/3) ... [2023-11-21 19:41:16,182 INFO L112 eAbstractionObserver]: Analyzing ICFG res2.c [2023-11-21 19:41:16,203 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:41:16,204 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 19:41:16,267 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:41:16,275 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;@7c132a78, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:41:16,276 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 19:41:16,280 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 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) [2023-11-21 19:41:16,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-21 19:41:16,286 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:16,287 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:41:16,287 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:41:16,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:16,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1447922718, now seen corresponding path program 1 times [2023-11-21 19:41:16,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:16,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126945268] [2023-11-21 19:41:16,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:16,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:16,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:16,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:41:16,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:16,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126945268] [2023-11-21 19:41:16,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126945268] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:41:16,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:41:16,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:41:16,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121291086] [2023-11-21 19:41:16,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:41:16,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:41:16,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:41:16,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:41:16,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:41:16,933 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 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 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:41:17,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:41:17,019 INFO L93 Difference]: Finished difference Result 26 states and 39 transitions. [2023-11-21 19:41:17,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:41:17,026 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-21 19:41:17,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:41:17,036 INFO L225 Difference]: With dead ends: 26 [2023-11-21 19:41:17,036 INFO L226 Difference]: Without dead ends: 12 [2023-11-21 19:41:17,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:41:17,048 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:41:17,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:41:17,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-11-21 19:41:17,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-11-21 19:41:17,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:41:17,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 17 transitions. [2023-11-21 19:41:17,077 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 17 transitions. Word has length 10 [2023-11-21 19:41:17,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:41:17,078 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 17 transitions. [2023-11-21 19:41:17,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:41:17,078 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 17 transitions. [2023-11-21 19:41:17,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-21 19:41:17,079 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:17,079 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:41:17,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 19:41:17,080 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:41:17,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:17,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1768713506, now seen corresponding path program 1 times [2023-11-21 19:41:17,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:17,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190800163] [2023-11-21 19:41:17,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:17,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:17,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:17,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 19:41:17,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:17,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190800163] [2023-11-21 19:41:17,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190800163] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:41:17,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:41:17,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 19:41:17,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763973946] [2023-11-21 19:41:17,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:41:17,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 19:41:17,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:41:17,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 19:41:17,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:41:17,263 INFO L87 Difference]: Start difference. First operand 12 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2023-11-21 19:41:17,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:41:17,351 INFO L93 Difference]: Finished difference Result 24 states and 37 transitions. [2023-11-21 19:41:17,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 19:41:17,352 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 11 [2023-11-21 19:41:17,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:41:17,354 INFO L225 Difference]: With dead ends: 24 [2023-11-21 19:41:17,354 INFO L226 Difference]: Without dead ends: 17 [2023-11-21 19:41:17,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:41:17,366 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 17 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:41:17,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 4 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:41:17,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-21 19:41:17,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-21 19:41:17,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 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) [2023-11-21 19:41:17,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2023-11-21 19:41:17,384 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 11 [2023-11-21 19:41:17,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:41:17,387 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2023-11-21 19:41:17,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2023-11-21 19:41:17,388 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2023-11-21 19:41:17,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-21 19:41:17,389 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:17,389 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:41:17,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 19:41:17,390 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:41:17,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:17,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1738268887, now seen corresponding path program 1 times [2023-11-21 19:41:17,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:17,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18426651] [2023-11-21 19:41:17,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:17,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:17,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:19,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:41:19,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:19,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18426651] [2023-11-21 19:41:19,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18426651] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:41:19,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766603725] [2023-11-21 19:41:19,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:19,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:41:19,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a975d02b-b0bf-40a8-8c66-883a5c7651d3/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:41:19,564 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a975d02b-b0bf-40a8-8c66-883a5c7651d3/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:41:19,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a975d02b-b0bf-40a8-8c66-883a5c7651d3/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 19:41:19,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:19,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-21 19:41:19,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:41:19,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-11-21 19:41:19,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-21 19:41:19,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:41:19,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-21 19:41:20,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:41:20,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 23 [2023-11-21 19:41:20,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:41:20,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:41:20,583 INFO L349 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2023-11-21 19:41:20,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2023-11-21 19:41:20,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:41:20,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 23 [2023-11-21 19:41:21,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:41:21,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2023-11-21 19:41:21,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:41:21,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2023-11-21 19:41:21,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:41:21,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2023-11-21 19:41:21,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:41:21,443 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:41:31,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:41:31,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766603725] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:41:31,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1479361884] [2023-11-21 19:41:31,273 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-21 19:41:31,274 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:41:31,277 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:41:31,283 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:41:31,283 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:41:31,992 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:41:32,821 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '279#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem20#1|) (<= (+ (* 3 ~N~0) 1) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|))' at error location [2023-11-21 19:41:32,821 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 19:41:32,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 19:41:32,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 39 [2023-11-21 19:41:32,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047212337] [2023-11-21 19:41:32,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 19:41:32,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-21 19:41:32,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:41:32,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-21 19:41:32,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1694, Unknown=2, NotChecked=0, Total=1980 [2023-11-21 19:41:32,827 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 39 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 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) [2023-11-21 19:41:34,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:41:34,371 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2023-11-21 19:41:34,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-21 19:41:34,379 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 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 16 [2023-11-21 19:41:34,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:41:34,385 INFO L225 Difference]: With dead ends: 29 [2023-11-21 19:41:34,385 INFO L226 Difference]: Without dead ends: 26 [2023-11-21 19:41:34,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=381, Invalid=2167, Unknown=2, NotChecked=0, Total=2550 [2023-11-21 19:41:34,396 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-21 19:41:34,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 33 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-21 19:41:34,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-21 19:41:34,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2023-11-21 19:41:34,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 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) [2023-11-21 19:41:34,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2023-11-21 19:41:34,412 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 16 [2023-11-21 19:41:34,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:41:34,412 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2023-11-21 19:41:34,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 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) [2023-11-21 19:41:34,413 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2023-11-21 19:41:34,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-21 19:41:34,414 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:34,414 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:41:34,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a975d02b-b0bf-40a8-8c66-883a5c7651d3/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-21 19:41:34,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a975d02b-b0bf-40a8-8c66-883a5c7651d3/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:41:34,629 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:41:34,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:34,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1005974216, now seen corresponding path program 2 times [2023-11-21 19:41:34,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:34,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025795287] [2023-11-21 19:41:34,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:34,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:34,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:34,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 19:41:34,748 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:34,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025795287] [2023-11-21 19:41:34,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025795287] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:41:34,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811143026] [2023-11-21 19:41:34,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 19:41:34,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:41:34,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a975d02b-b0bf-40a8-8c66-883a5c7651d3/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:41:34,753 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a975d02b-b0bf-40a8-8c66-883a5c7651d3/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:41:34,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a975d02b-b0bf-40a8-8c66-883a5c7651d3/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 19:41:34,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-21 19:41:34,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 19:41:34,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 19:41:34,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:41:34,921 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 19:41:34,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:41:34,973 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 19:41:34,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811143026] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:41:34,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [328240445] [2023-11-21 19:41:34,977 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-21 19:41:34,979 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:41:34,979 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:41:34,980 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:41:34,980 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:41:36,637 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:41:37,014 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '498#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem20#1|) (<= (+ (* 3 ~N~0) 1) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|))' at error location [2023-11-21 19:41:37,014 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 19:41:37,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 19:41:37,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-11-21 19:41:37,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529350946] [2023-11-21 19:41:37,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 19:41:37,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-21 19:41:37,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:41:37,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-21 19:41:37,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-11-21 19:41:37,017 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 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) [2023-11-21 19:41:37,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:41:37,264 INFO L93 Difference]: Finished difference Result 63 states and 86 transitions. [2023-11-21 19:41:37,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 19:41:37,265 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 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 17 [2023-11-21 19:41:37,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:41:37,265 INFO L225 Difference]: With dead ends: 63 [2023-11-21 19:41:37,265 INFO L226 Difference]: Without dead ends: 35 [2023-11-21 19:41:37,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2023-11-21 19:41:37,267 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 19 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 19:41:37,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 10 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 19:41:37,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-21 19:41:37,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2023-11-21 19:41:37,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 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) [2023-11-21 19:41:37,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2023-11-21 19:41:37,282 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 17 [2023-11-21 19:41:37,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:41:37,282 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2023-11-21 19:41:37,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 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) [2023-11-21 19:41:37,282 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2023-11-21 19:41:37,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-21 19:41:37,285 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:37,289 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:41:37,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a975d02b-b0bf-40a8-8c66-883a5c7651d3/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 19:41:37,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a975d02b-b0bf-40a8-8c66-883a5c7651d3/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:41:37,509 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:41:37,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:37,509 INFO L85 PathProgramCache]: Analyzing trace with hash 455131060, now seen corresponding path program 3 times [2023-11-21 19:41:37,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:37,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307958100] [2023-11-21 19:41:37,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:37,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:37,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:37,697 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-21 19:41:37,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:37,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307958100] [2023-11-21 19:41:37,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307958100] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:41:37,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547099722] [2023-11-21 19:41:37,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-21 19:41:37,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:41:37,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a975d02b-b0bf-40a8-8c66-883a5c7651d3/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:41:37,699 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a975d02b-b0bf-40a8-8c66-883a5c7651d3/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:41:37,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a975d02b-b0bf-40a8-8c66-883a5c7651d3/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 19:41:37,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-21 19:41:37,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 19:41:37,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 19:41:37,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:41:37,868 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-21 19:41:37,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:41:37,994 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-21 19:41:37,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547099722] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:41:37,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1714594801] [2023-11-21 19:41:37,997 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-21 19:41:37,998 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:41:37,998 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:41:37,998 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:41:37,998 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:41:39,265 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:41:39,632 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '783#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem20#1|) (<= (+ (* 3 ~N~0) 1) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|))' at error location [2023-11-21 19:41:39,632 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 19:41:39,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 19:41:39,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-21 19:41:39,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875281959] [2023-11-21 19:41:39,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 19:41:39,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-21 19:41:39,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:41:39,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-21 19:41:39,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2023-11-21 19:41:39,635 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 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) [2023-11-21 19:41:39,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:41:39,859 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2023-11-21 19:41:39,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 19:41:39,860 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 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 [2023-11-21 19:41:39,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:41:39,860 INFO L225 Difference]: With dead ends: 32 [2023-11-21 19:41:39,860 INFO L226 Difference]: Without dead ends: 23 [2023-11-21 19:41:39,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 15 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-11-21 19:41:39,862 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 20 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 19:41:39,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 10 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 19:41:39,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-21 19:41:39,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-21 19:41:39,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 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) [2023-11-21 19:41:39,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2023-11-21 19:41:39,869 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 18 [2023-11-21 19:41:39,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:41:39,870 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2023-11-21 19:41:39,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 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) [2023-11-21 19:41:39,870 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2023-11-21 19:41:39,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-21 19:41:39,871 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:39,871 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:41:39,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a975d02b-b0bf-40a8-8c66-883a5c7651d3/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 19:41:40,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a975d02b-b0bf-40a8-8c66-883a5c7651d3/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:41:40,082 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:41:40,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:40,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1490243518, now seen corresponding path program 4 times [2023-11-21 19:41:40,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:40,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668847606] [2023-11-21 19:41:40,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:40,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:40,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:43,387 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:41:43,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:43,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668847606] [2023-11-21 19:41:43,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668847606] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:41:43,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318694273] [2023-11-21 19:41:43,388 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-21 19:41:43,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:41:43,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a975d02b-b0bf-40a8-8c66-883a5c7651d3/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:41:43,391 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a975d02b-b0bf-40a8-8c66-883a5c7651d3/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:41:43,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a975d02b-b0bf-40a8-8c66-883a5c7651d3/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 19:41:43,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:43,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 76 conjunts are in the unsatisfiable core [2023-11-21 19:41:43,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:41:43,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-21 19:41:43,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-21 19:41:43,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-21 19:41:43,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-11-21 19:41:44,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2023-11-21 19:41:44,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2023-11-21 19:41:44,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:41:44,483 INFO L349 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2023-11-21 19:41:44,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2023-11-21 19:41:44,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:41:44,735 INFO L349 Elim1Store]: treesize reduction 48, result has 29.4 percent of original size [2023-11-21 19:41:44,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 57 treesize of output 62 [2023-11-21 19:41:45,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:41:45,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 33 [2023-11-21 19:41:45,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:41:45,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 35 [2023-11-21 19:41:45,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:41:45,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:41:45,449 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-11-21 19:41:45,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 45 [2023-11-21 19:41:45,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:41:45,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:41:45,644 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-11-21 19:41:45,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 55 [2023-11-21 19:41:46,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:41:46,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:41:46,027 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2023-11-21 19:41:46,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 64 treesize of output 56 [2023-11-21 19:41:46,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:41:46,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:41:46,228 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2023-11-21 19:41:46,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 64 treesize of output 56 [2023-11-21 19:41:46,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:41:46,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:41:46,443 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 19:41:46,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 54 treesize of output 38 [2023-11-21 19:41:46,556 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:41:46,557 INFO L327 TraceCheckSpWp]: Computing backward predicates...