./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/insertion_sort-1-2.c --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_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/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_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/insertion_sort-1-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/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_c8438904-8b9e-43e5-b92a-3a649694eea8/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 36d1103e69366c6d9110aa7e24b0c4765120510facc121d7623fcf9373a67e96 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:47:22,678 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:47:22,772 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:47:22,778 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:47:22,779 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:47:22,807 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:47:22,808 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:47:22,808 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:47:22,809 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:47:22,810 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:47:22,810 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:47:22,811 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:47:22,811 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:47:22,812 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:47:22,816 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:47:22,817 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:47:22,817 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:47:22,818 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:47:22,818 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:47:22,819 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:47:22,821 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:47:22,821 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:47:22,822 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:47:22,823 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:47:22,823 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:47:22,824 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:47:22,824 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:47:22,825 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:47:22,825 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:47:22,825 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:47:22,827 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:47:22,827 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:47:22,827 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:47:22,827 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:47:22,828 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:47:22,828 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:47:22,828 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:47:22,829 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:47:22,829 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:47:22,829 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:47:22,830 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:47:22,830 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:47:22,830 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:47:22,830 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:47:22,831 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:47:22,831 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_c8438904-8b9e-43e5-b92a-3a649694eea8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 36d1103e69366c6d9110aa7e24b0c4765120510facc121d7623fcf9373a67e96 [2023-11-12 00:47:23,097 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:47:23,129 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:47:23,131 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:47:23,133 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:47:23,133 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:47:23,136 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/loops/insertion_sort-1-2.c [2023-11-12 00:47:26,421 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:47:26,622 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:47:26,622 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/sv-benchmarks/c/loops/insertion_sort-1-2.c [2023-11-12 00:47:26,631 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/data/bb035e795/78fbf838d2b94db39f7287048adc3251/FLAG80b39c9ad [2023-11-12 00:47:26,652 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/data/bb035e795/78fbf838d2b94db39f7287048adc3251 [2023-11-12 00:47:26,659 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:47:26,661 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:47:26,663 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:47:26,664 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:47:26,670 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:47:26,673 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:47:26" (1/1) ... [2023-11-12 00:47:26,674 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28af79f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:26, skipping insertion in model container [2023-11-12 00:47:26,674 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:47:26" (1/1) ... [2023-11-12 00:47:26,703 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:47:26,892 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_c8438904-8b9e-43e5-b92a-3a649694eea8/sv-benchmarks/c/loops/insertion_sort-1-2.c[330,343] [2023-11-12 00:47:26,926 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:47:26,937 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:47:26,957 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_c8438904-8b9e-43e5-b92a-3a649694eea8/sv-benchmarks/c/loops/insertion_sort-1-2.c[330,343] [2023-11-12 00:47:26,981 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:47:27,006 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:47:27,006 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:27 WrapperNode [2023-11-12 00:47:27,007 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:47:27,008 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:47:27,008 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:47:27,009 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:47:27,017 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:27" (1/1) ... [2023-11-12 00:47:27,038 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:27" (1/1) ... [2023-11-12 00:47:27,072 INFO L138 Inliner]: procedures = 15, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 87 [2023-11-12 00:47:27,073 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:47:27,073 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:47:27,074 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:47:27,074 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:47:27,084 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:27" (1/1) ... [2023-11-12 00:47:27,084 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:27" (1/1) ... [2023-11-12 00:47:27,089 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:27" (1/1) ... [2023-11-12 00:47:27,089 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:27" (1/1) ... [2023-11-12 00:47:27,099 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:27" (1/1) ... [2023-11-12 00:47:27,103 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:27" (1/1) ... [2023-11-12 00:47:27,105 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:27" (1/1) ... [2023-11-12 00:47:27,109 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:27" (1/1) ... [2023-11-12 00:47:27,111 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:47:27,120 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:47:27,120 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:47:27,121 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:47:27,122 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:27" (1/1) ... [2023-11-12 00:47:27,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:47:27,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:47:27,163 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:47:27,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:47:27,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:47:27,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:47:27,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:47:27,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:47:27,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:47:27,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:47:27,206 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:47:27,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:47:27,294 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:47:27,296 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:47:27,478 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:47:27,559 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:47:27,559 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-12 00:47:27,562 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:47:27 BoogieIcfgContainer [2023-11-12 00:47:27,562 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:47:27,566 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:47:27,566 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:47:27,570 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:47:27,570 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:47:26" (1/3) ... [2023-11-12 00:47:27,571 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6374bef4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:47:27, skipping insertion in model container [2023-11-12 00:47:27,572 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:27" (2/3) ... [2023-11-12 00:47:27,572 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6374bef4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:47:27, skipping insertion in model container [2023-11-12 00:47:27,572 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:47:27" (3/3) ... [2023-11-12 00:47:27,574 INFO L112 eAbstractionObserver]: Analyzing ICFG insertion_sort-1-2.c [2023-11-12 00:47:27,596 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:47:27,596 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:47:27,658 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:47:27,664 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;@795bbd92, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:47:27,665 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:47:27,668 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 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 00:47:27,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-12 00:47:27,673 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:27,674 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:47:27,674 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:27,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:27,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1323722535, now seen corresponding path program 1 times [2023-11-12 00:47:27,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:27,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541226992] [2023-11-12 00:47:27,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:27,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:27,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:28,244 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 00:47:28,245 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:28,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541226992] [2023-11-12 00:47:28,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541226992] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:47:28,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:47:28,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:47:28,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150488888] [2023-11-12 00:47:28,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:47:28,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:47:28,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:28,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:47:28,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:47:28,303 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 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 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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 00:47:28,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:28,420 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2023-11-12 00:47:28,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:47:28,423 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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 00:47:28,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:28,455 INFO L225 Difference]: With dead ends: 31 [2023-11-12 00:47:28,456 INFO L226 Difference]: Without dead ends: 16 [2023-11-12 00:47:28,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:47:28,463 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:28,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 17 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:47:28,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-12 00:47:28,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 13. [2023-11-12 00:47:28,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 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 00:47:28,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2023-11-12 00:47:28,501 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 7 [2023-11-12 00:47:28,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:28,502 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2023-11-12 00:47:28,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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 00:47:28,502 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2023-11-12 00:47:28,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-12 00:47:28,503 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:28,503 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:47:28,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:47:28,504 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:28,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:28,505 INFO L85 PathProgramCache]: Analyzing trace with hash 357824212, now seen corresponding path program 1 times [2023-11-12 00:47:28,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:28,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365980816] [2023-11-12 00:47:28,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:28,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:28,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:28,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:47:28,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:28,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365980816] [2023-11-12 00:47:28,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365980816] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:47:28,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:47:28,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:47:28,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522455328] [2023-11-12 00:47:28,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:47:28,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:47:28,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:28,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:47:28,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:47:28,844 INFO L87 Difference]: Start difference. First operand 13 states and 16 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) [2023-11-12 00:47:28,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:28,913 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2023-11-12 00:47:28,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:47:28,914 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 [2023-11-12 00:47:28,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:28,916 INFO L225 Difference]: With dead ends: 24 [2023-11-12 00:47:28,916 INFO L226 Difference]: Without dead ends: 14 [2023-11-12 00:47:28,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:47:28,925 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:28,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:47:28,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-11-12 00:47:28,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-11-12 00:47:28,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 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) [2023-11-12 00:47:28,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2023-11-12 00:47:28,932 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 11 [2023-11-12 00:47:28,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:28,933 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2023-11-12 00:47:28,933 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) [2023-11-12 00:47:28,933 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2023-11-12 00:47:28,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-12 00:47:28,934 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:28,934 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:47:28,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:47:28,935 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:28,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:28,935 INFO L85 PathProgramCache]: Analyzing trace with hash -549655058, now seen corresponding path program 1 times [2023-11-12 00:47:28,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:28,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265858732] [2023-11-12 00:47:28,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:28,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:28,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:29,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:47:29,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:29,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265858732] [2023-11-12 00:47:29,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265858732] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:47:29,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129949668] [2023-11-12 00:47:29,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:29,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:29,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:47:29,085 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:47:29,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:47:29,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:29,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 00:47:29,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:47:29,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:47:29,249 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:47:29,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:47:29,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129949668] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:47:29,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [977201986] [2023-11-12 00:47:29,400 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-12 00:47:29,401 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:47:29,408 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:47:29,417 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:47:29,418 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:47:30,676 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:47:31,258 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '214#(and (= |ULTIMATE.start_main_~k~0#1| 1) (= |ULTIMATE.start_main_~#v~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296) (mod |ULTIMATE.start_main_~j~0#1| 4294967296)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) 0) |ULTIMATE.start_main_#t~mem13#1|) (<= 2 (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) 4) |ULTIMATE.start_main_#t~mem14#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= (+ |ULTIMATE.start_main_#t~mem14#1| 1) |ULTIMATE.start_main_#t~mem13#1|))' at error location [2023-11-12 00:47:31,258 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:47:31,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:47:31,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-12 00:47:31,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687357043] [2023-11-12 00:47:31,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:47:31,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:47:31,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:31,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:47:31,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-11-12 00:47:31,269 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 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 00:47:31,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:31,361 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2023-11-12 00:47:31,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:47:31,362 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 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) Word has length 12 [2023-11-12 00:47:31,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:31,363 INFO L225 Difference]: With dead ends: 28 [2023-11-12 00:47:31,363 INFO L226 Difference]: Without dead ends: 18 [2023-11-12 00:47:31,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-11-12 00:47:31,365 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:31,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 19 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:47:31,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-12 00:47:31,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2023-11-12 00:47:31,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 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 00:47:31,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2023-11-12 00:47:31,370 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 12 [2023-11-12 00:47:31,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:31,370 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2023-11-12 00:47:31,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 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 00:47:31,371 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2023-11-12 00:47:31,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-12 00:47:31,371 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:31,371 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:47:31,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:47:31,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:31,578 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:31,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:31,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1383258644, now seen corresponding path program 2 times [2023-11-12 00:47:31,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:31,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830728635] [2023-11-12 00:47:31,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:31,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:31,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:32,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:47:32,443 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:32,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830728635] [2023-11-12 00:47:32,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830728635] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:47:32,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257279392] [2023-11-12 00:47:32,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:47:32,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:32,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:47:32,447 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:47:32,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:47:32,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 00:47:32,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:47:32,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-12 00:47:32,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:47:32,675 INFO L351 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 27 treesize of output 15 [2023-11-12 00:47:32,730 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:47:32,730 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-11-12 00:47:32,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 00:47:32,749 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:47:32,893 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 57 treesize of output 51 [2023-11-12 00:47:32,923 INFO L322 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2023-11-12 00:47:32,923 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 80 [2023-11-12 00:47:33,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 00:47:33,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257279392] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:47:33,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1167937639] [2023-11-12 00:47:33,023 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-12 00:47:33,023 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:47:33,023 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:47:33,024 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:47:33,024 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:47:33,798 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:47:34,379 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '378#(and (= |ULTIMATE.start_main_~k~0#1| 1) (= |ULTIMATE.start_main_~#v~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296) (mod |ULTIMATE.start_main_~j~0#1| 4294967296)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) 0) |ULTIMATE.start_main_#t~mem13#1|) (<= 2 (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) 4) |ULTIMATE.start_main_#t~mem14#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= (+ |ULTIMATE.start_main_#t~mem14#1| 1) |ULTIMATE.start_main_#t~mem13#1|))' at error location [2023-11-12 00:47:34,379 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:47:34,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:47:34,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 21 [2023-11-12 00:47:34,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122915331] [2023-11-12 00:47:34,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:47:34,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-12 00:47:34,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:34,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-12 00:47:34,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2023-11-12 00:47:34,382 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 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 00:47:35,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:35,004 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2023-11-12 00:47:35,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-12 00:47:35,004 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 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 13 [2023-11-12 00:47:35,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:35,005 INFO L225 Difference]: With dead ends: 47 [2023-11-12 00:47:35,006 INFO L226 Difference]: Without dead ends: 45 [2023-11-12 00:47:35,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=257, Invalid=1383, Unknown=0, NotChecked=0, Total=1640 [2023-11-12 00:47:35,008 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 117 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:35,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 42 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:47:35,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-12 00:47:35,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 23. [2023-11-12 00:47:35,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:47:35,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2023-11-12 00:47:35,023 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 13 [2023-11-12 00:47:35,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:35,023 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2023-11-12 00:47:35,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 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 00:47:35,024 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2023-11-12 00:47:35,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-12 00:47:35,025 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:35,025 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:47:35,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:47:35,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:35,231 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:35,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:35,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1547777847, now seen corresponding path program 1 times [2023-11-12 00:47:35,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:35,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57402006] [2023-11-12 00:47:35,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:35,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:35,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:35,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:47:35,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:35,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57402006] [2023-11-12 00:47:35,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57402006] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:47:35,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705695086] [2023-11-12 00:47:35,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:35,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:35,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:47:35,460 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:47:35,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:47:35,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:35,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 00:47:35,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:47:35,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:47:35,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:47:35,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:47:35,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705695086] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:47:35,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [440745435] [2023-11-12 00:47:35,930 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-11-12 00:47:35,930 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:47:35,931 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:47:35,931 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:47:35,931 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:47:36,830 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:47:37,501 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '610#(and (= |ULTIMATE.start_main_~#v~0#1.offset| 0) (<= (+ (mod |ULTIMATE.start_main_~k~0#1| 4294967296) 1) (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)) (<= 1 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (- 4)))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (* |ULTIMATE.start_main_~k~0#1| 4)) |ULTIMATE.start_main_#t~mem14#1|) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= (+ |ULTIMATE.start_main_#t~mem14#1| 1) |ULTIMATE.start_main_#t~mem13#1|))' at error location [2023-11-12 00:47:37,501 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:47:37,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:47:37,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2023-11-12 00:47:37,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916089505] [2023-11-12 00:47:37,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:47:37,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 00:47:37,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:37,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 00:47:37,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2023-11-12 00:47:37,504 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 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 00:47:37,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:37,778 INFO L93 Difference]: Finished difference Result 72 states and 94 transitions. [2023-11-12 00:47:37,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 00:47:37,778 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 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 [2023-11-12 00:47:37,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:37,780 INFO L225 Difference]: With dead ends: 72 [2023-11-12 00:47:37,780 INFO L226 Difference]: Without dead ends: 51 [2023-11-12 00:47:37,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2023-11-12 00:47:37,781 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 30 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:37,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 52 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:47:37,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-12 00:47:37,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2023-11-12 00:47:37,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2857142857142858) internal successors, (54), 42 states have internal predecessors, (54), 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 00:47:37,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2023-11-12 00:47:37,795 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 16 [2023-11-12 00:47:37,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:37,796 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2023-11-12 00:47:37,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 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 00:47:37,796 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2023-11-12 00:47:37,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-12 00:47:37,797 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:37,797 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:47:37,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:47:38,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:38,009 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:38,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:38,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1678803274, now seen corresponding path program 1 times [2023-11-12 00:47:38,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:38,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874730609] [2023-11-12 00:47:38,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:38,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:38,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:38,198 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 00:47:38,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:38,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874730609] [2023-11-12 00:47:38,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874730609] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:47:38,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317326680] [2023-11-12 00:47:38,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:38,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:38,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:47:38,201 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:47:38,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:47:38,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:38,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 00:47:38,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:47:38,331 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 00:47:38,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:47:38,362 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 00:47:38,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317326680] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:47:38,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2073953159] [2023-11-12 00:47:38,366 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-12 00:47:38,366 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:47:38,367 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:47:38,367 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:47:38,367 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:47:39,002 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:47:39,711 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '903#(and (= |ULTIMATE.start_main_~k~0#1| 1) (= |ULTIMATE.start_main_~#v~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296) (mod |ULTIMATE.start_main_~j~0#1| 4294967296)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) 0) |ULTIMATE.start_main_#t~mem13#1|) (<= 2 (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) 4) |ULTIMATE.start_main_#t~mem14#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (exists ((|v_ULTIMATE.start_main_#t~short10#1_16| Bool) (|v_ULTIMATE.start_main_#t~mem9#1_63| Int) (|v_ULTIMATE.start_main_#t~mem9#1_64| Int) (|v_#memory_int_71| (Array Int (Array Int Int)))) (and (= |#memory_int| (store |v_#memory_int_71| |ULTIMATE.start_main_~#v~0#1.base| (store (select |v_#memory_int_71| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) 4) |ULTIMATE.start_main_~key~0#1|))) (or (and (= |v_ULTIMATE.start_main_#t~mem9#1_64| |v_ULTIMATE.start_main_#t~mem9#1_63|) (not |v_ULTIMATE.start_main_#t~short10#1_16|)) (and |v_ULTIMATE.start_main_#t~short10#1_16| (<= |v_ULTIMATE.start_main_#t~mem9#1_64| |ULTIMATE.start_main_~key~0#1|) (= (select (select |v_#memory_int_71| |ULTIMATE.start_main_~#v~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) |v_ULTIMATE.start_main_#t~mem9#1_64|))) (or (and (<= (+ |ULTIMATE.start_main_~i~0#1| 1) 0) (not |v_ULTIMATE.start_main_#t~short10#1_16|)) (and |v_ULTIMATE.start_main_#t~short10#1_16| (<= 0 |ULTIMATE.start_main_~i~0#1|))))) (<= (+ |ULTIMATE.start_main_#t~mem14#1| 1) |ULTIMATE.start_main_#t~mem13#1|))' at error location [2023-11-12 00:47:39,711 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:47:39,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:47:39,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2023-11-12 00:47:39,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043483227] [2023-11-12 00:47:39,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:47:39,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 00:47:39,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:39,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 00:47:39,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=238, Unknown=13, NotChecked=0, Total=306 [2023-11-12 00:47:39,713 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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) [2023-11-12 00:47:39,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:39,802 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2023-11-12 00:47:39,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 00:47:39,803 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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) Word has length 17 [2023-11-12 00:47:39,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:39,803 INFO L225 Difference]: With dead ends: 54 [2023-11-12 00:47:39,803 INFO L226 Difference]: Without dead ends: 30 [2023-11-12 00:47:39,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=64, Invalid=265, Unknown=13, NotChecked=0, Total=342 [2023-11-12 00:47:39,805 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 8 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:39,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 35 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:47:39,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-12 00:47:39,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2023-11-12 00:47:39,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 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) [2023-11-12 00:47:39,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2023-11-12 00:47:39,812 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 17 [2023-11-12 00:47:39,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:39,813 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2023-11-12 00:47:39,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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) [2023-11-12 00:47:39,813 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2023-11-12 00:47:39,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 00:47:39,814 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:39,814 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:47:39,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:47:40,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:40,015 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:40,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:40,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1183689188, now seen corresponding path program 2 times [2023-11-12 00:47:40,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:40,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368378592] [2023-11-12 00:47:40,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:40,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:40,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:40,943 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:47:40,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:40,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368378592] [2023-11-12 00:47:40,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368378592] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:47:40,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769755035] [2023-11-12 00:47:40,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:47:40,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:40,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:47:40,946 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:47:40,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:47:41,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-12 00:47:41,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:47:41,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-12 00:47:41,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:47:41,192 INFO L351 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 27 treesize of output 15 [2023-11-12 00:47:41,251 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:47:41,252 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-11-12 00:47:41,268 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 00:47:41,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:47:41,399 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 57 treesize of output 51 [2023-11-12 00:47:41,424 INFO L322 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2023-11-12 00:47:41,424 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 80 [2023-11-12 00:47:41,525 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 00:47:41,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769755035] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:47:41,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1562425510] [2023-11-12 00:47:41,528 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-12 00:47:41,528 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:47:41,528 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:47:41,528 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:47:41,528 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:47:42,102 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:47:43,109 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1174#(and (= |ULTIMATE.start_main_~k~0#1| 1) (= |ULTIMATE.start_main_~#v~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296) (mod |ULTIMATE.start_main_~j~0#1| 4294967296)) (exists ((|v_ULTIMATE.start_main_#t~mem9#1_81| Int) (|v_#memory_int_85| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_#t~mem9#1_82| Int) (|v_ULTIMATE.start_main_#t~short10#1_16| Bool)) (and (or (and (= |v_ULTIMATE.start_main_#t~mem9#1_82| |v_ULTIMATE.start_main_#t~mem9#1_81|) (not |v_ULTIMATE.start_main_#t~short10#1_16|)) (and (<= |v_ULTIMATE.start_main_#t~mem9#1_82| |ULTIMATE.start_main_~key~0#1|) |v_ULTIMATE.start_main_#t~short10#1_16| (= (select (select |v_#memory_int_85| |ULTIMATE.start_main_~#v~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)) |v_ULTIMATE.start_main_#t~mem9#1_82|))) (= |#memory_int| (store |v_#memory_int_85| |ULTIMATE.start_main_~#v~0#1.base| (store (select |v_#memory_int_85| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) 4) |ULTIMATE.start_main_~key~0#1|))) (or (and (<= (+ |ULTIMATE.start_main_~i~0#1| 1) 0) (not |v_ULTIMATE.start_main_#t~short10#1_16|)) (and |v_ULTIMATE.start_main_#t~short10#1_16| (<= 0 |ULTIMATE.start_main_~i~0#1|))))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) 0) |ULTIMATE.start_main_#t~mem13#1|) (<= 2 (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) 4) |ULTIMATE.start_main_#t~mem14#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= (+ |ULTIMATE.start_main_#t~mem14#1| 1) |ULTIMATE.start_main_#t~mem13#1|))' at error location [2023-11-12 00:47:43,109 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:47:43,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:47:43,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 11] total 24 [2023-11-12 00:47:43,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135603729] [2023-11-12 00:47:43,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:47:43,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-12 00:47:43,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:43,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-12 00:47:43,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=860, Unknown=21, NotChecked=0, Total=992 [2023-11-12 00:47:43,112 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 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 00:47:44,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:44,203 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2023-11-12 00:47:44,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-12 00:47:44,203 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 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 20 [2023-11-12 00:47:44,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:44,205 INFO L225 Difference]: With dead ends: 74 [2023-11-12 00:47:44,205 INFO L226 Difference]: Without dead ends: 72 [2023-11-12 00:47:44,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=385, Invalid=2346, Unknown=25, NotChecked=0, Total=2756 [2023-11-12 00:47:44,208 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 239 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:44,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 66 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:47:44,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-12 00:47:44,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 32. [2023-11-12 00:47:44,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 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 00:47:44,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2023-11-12 00:47:44,218 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 20 [2023-11-12 00:47:44,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:44,218 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2023-11-12 00:47:44,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 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 00:47:44,219 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2023-11-12 00:47:44,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-12 00:47:44,220 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:44,220 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:47:44,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 00:47:44,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:44,426 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:44,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:44,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1926418580, now seen corresponding path program 2 times [2023-11-12 00:47:44,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:44,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003641151] [2023-11-12 00:47:44,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:44,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:45,443 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:47:45,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:45,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003641151] [2023-11-12 00:47:45,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003641151] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:47:45,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978256173] [2023-11-12 00:47:45,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:47:45,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:45,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:47:45,446 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:47:45,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 00:47:45,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 00:47:45,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:47:45,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-12 00:47:45,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:47:45,840 INFO L351 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 27 treesize of output 15 [2023-11-12 00:47:45,973 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:47:45,973 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-11-12 00:47:45,995 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 00:47:45,995 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:47:46,181 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 59 treesize of output 53 [2023-11-12 00:47:46,205 INFO L322 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2023-11-12 00:47:46,206 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 72 [2023-11-12 00:47:46,255 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 00:47:46,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978256173] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:47:46,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [34816167] [2023-11-12 00:47:46,261 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-11-12 00:47:46,261 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:47:46,261 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:47:46,262 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:47:46,262 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:47:46,892 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:47:47,595 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1521#(and (= |ULTIMATE.start_main_~#v~0#1.offset| 0) (<= (+ (mod |ULTIMATE.start_main_~k~0#1| 4294967296) 1) (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)) (<= 1 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (- 4)))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (* |ULTIMATE.start_main_~k~0#1| 4)) |ULTIMATE.start_main_#t~mem14#1|) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= (+ |ULTIMATE.start_main_#t~mem14#1| 1) |ULTIMATE.start_main_#t~mem13#1|))' at error location [2023-11-12 00:47:47,595 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:47:47,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:47:47,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 26 [2023-11-12 00:47:47,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375020737] [2023-11-12 00:47:47,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:47:47,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-12 00:47:47,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:47,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-12 00:47:47,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1123, Unknown=0, NotChecked=0, Total=1260 [2023-11-12 00:47:47,598 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 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 00:47:48,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:48,411 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2023-11-12 00:47:48,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-12 00:47:48,411 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-12 00:47:48,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:48,412 INFO L225 Difference]: With dead ends: 70 [2023-11-12 00:47:48,413 INFO L226 Difference]: Without dead ends: 68 [2023-11-12 00:47:48,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=384, Invalid=2586, Unknown=0, NotChecked=0, Total=2970 [2023-11-12 00:47:48,415 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 167 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:48,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 85 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:47:48,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-11-12 00:47:48,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 39. [2023-11-12 00:47:48,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 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 00:47:48,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2023-11-12 00:47:48,428 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 21 [2023-11-12 00:47:48,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:48,428 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2023-11-12 00:47:48,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 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 00:47:48,429 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2023-11-12 00:47:48,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-12 00:47:48,430 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:48,430 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:47:48,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 00:47:48,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:48,637 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:48,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:48,637 INFO L85 PathProgramCache]: Analyzing trace with hash 731834650, now seen corresponding path program 3 times [2023-11-12 00:47:48,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:48,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549095273] [2023-11-12 00:47:48,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:48,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:48,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:48,799 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 00:47:48,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:48,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549095273] [2023-11-12 00:47:48,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549095273] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:47:48,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182098475] [2023-11-12 00:47:48,800 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 00:47:48,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:48,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:47:48,801 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:47:48,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 00:47:48,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 00:47:48,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:47:48,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 00:47:48,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:47:48,952 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 00:47:48,953 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:47:48,995 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 00:47:48,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182098475] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:47:48,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1158454194] [2023-11-12 00:47:48,998 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-12 00:47:48,998 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:47:48,998 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:47:48,999 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:47:48,999 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:47:49,447 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:47:49,609 WARN L876 $PredicateComparison]: unable to prove that (or (and (= |c_ULTIMATE.start_main_~j~0#1| 1) (exists ((|v_ULTIMATE.start_main_~j~0#1_112| Int)) (and (let ((.cse0 (<= 1 |c_#StackHeapBarrier|)) (.cse1 (<= 2 |c_ULTIMATE.start_main_~#v~0#1.base|))) (or (and .cse0 .cse1 (<= 1 |v_ULTIMATE.start_main_~j~0#1_112|)) (and .cse0 (<= 0 |v_ULTIMATE.start_main_~j~0#1_112|) .cse1))) (<= (mod |c_ULTIMATE.start_main_~SIZE~0#1| 4294967296) (mod |v_ULTIMATE.start_main_~j~0#1_112| 4294967296)))) (= |c_ULTIMATE.start_main_~#v~0#1.offset| 0)) (exists ((|v_ULTIMATE.start_main_#t~mem9#1_117| Int) (|v_ULTIMATE.start_main_#t~mem9#1_116| Int) (|v_ULTIMATE.start_main_#t~short10#1_16| Bool) (|v_#memory_int_110| (Array Int (Array Int Int)))) (let ((.cse2 (not |v_ULTIMATE.start_main_#t~short10#1_16|)) (.cse3 (select |v_#memory_int_110| |c_ULTIMATE.start_main_~#v~0#1.base|)) (.cse4 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (and (or (and .cse2 (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) 0)) (and |v_ULTIMATE.start_main_#t~short10#1_16| (<= 0 |c_ULTIMATE.start_main_~i~0#1|))) (= |c_#memory_int| (store |v_#memory_int_110| |c_ULTIMATE.start_main_~#v~0#1.base| (store .cse3 (+ .cse4 |c_ULTIMATE.start_main_~#v~0#1.offset| 4) |c_ULTIMATE.start_main_~key~0#1|))) (or (and (= |v_ULTIMATE.start_main_#t~mem9#1_117| |v_ULTIMATE.start_main_#t~mem9#1_116|) .cse2) (and |v_ULTIMATE.start_main_#t~short10#1_16| (<= |v_ULTIMATE.start_main_#t~mem9#1_117| |c_ULTIMATE.start_main_~key~0#1|) (= |v_ULTIMATE.start_main_#t~mem9#1_117| (select .cse3 (+ .cse4 |c_ULTIMATE.start_main_~#v~0#1.offset|))))))))) is different from true [2023-11-12 00:47:50,053 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1871#(and (= |ULTIMATE.start_main_~k~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) |ULTIMATE.start_main_~#v~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296) (mod |ULTIMATE.start_main_~j~0#1| 4294967296)) (<= 2 (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)) (exists ((|v_ULTIMATE.start_main_#t~mem9#1_117| Int) (|v_ULTIMATE.start_main_#t~mem9#1_116| Int) (|v_ULTIMATE.start_main_#t~short10#1_16| Bool) (|v_#memory_int_110| (Array Int (Array Int Int)))) (and (or (and (= |v_ULTIMATE.start_main_#t~mem9#1_117| |v_ULTIMATE.start_main_#t~mem9#1_116|) (not |v_ULTIMATE.start_main_#t~short10#1_16|)) (and |v_ULTIMATE.start_main_#t~short10#1_16| (= |v_ULTIMATE.start_main_#t~mem9#1_117| (select (select |v_#memory_int_110| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |ULTIMATE.start_main_~#v~0#1.offset|))) (<= |v_ULTIMATE.start_main_#t~mem9#1_117| |ULTIMATE.start_main_~key~0#1|))) (= |#memory_int| (store |v_#memory_int_110| |ULTIMATE.start_main_~#v~0#1.base| (store (select |v_#memory_int_110| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |ULTIMATE.start_main_~#v~0#1.offset| 4) |ULTIMATE.start_main_~key~0#1|))) (or (and (<= (+ |ULTIMATE.start_main_~i~0#1| 1) 0) (not |v_ULTIMATE.start_main_#t~short10#1_16|)) (and |v_ULTIMATE.start_main_#t~short10#1_16| (<= 0 |ULTIMATE.start_main_~i~0#1|))))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (+ |ULTIMATE.start_main_~#v~0#1.offset| 4)) |ULTIMATE.start_main_#t~mem14#1|) (<= (+ |ULTIMATE.start_main_#t~mem14#1| 1) |ULTIMATE.start_main_#t~mem13#1|))' at error location [2023-11-12 00:47:50,054 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:47:50,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:47:50,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2023-11-12 00:47:50,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031376707] [2023-11-12 00:47:50,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:47:50,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 00:47:50,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:50,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 00:47:50,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=188, Unknown=14, NotChecked=28, Total=272 [2023-11-12 00:47:50,061 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 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) [2023-11-12 00:47:50,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:50,276 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2023-11-12 00:47:50,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-12 00:47:50,289 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 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 24 [2023-11-12 00:47:50,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:50,290 INFO L225 Difference]: With dead ends: 85 [2023-11-12 00:47:50,290 INFO L226 Difference]: Without dead ends: 76 [2023-11-12 00:47:50,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=112, Invalid=377, Unknown=21, NotChecked=42, Total=552 [2023-11-12 00:47:50,292 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 38 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:50,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 61 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:47:50,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-12 00:47:50,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 41. [2023-11-12 00:47:50,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.275) internal successors, (51), 40 states have internal predecessors, (51), 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 00:47:50,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2023-11-12 00:47:50,303 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 24 [2023-11-12 00:47:50,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:50,303 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2023-11-12 00:47:50,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 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) [2023-11-12 00:47:50,304 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2023-11-12 00:47:50,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-12 00:47:50,305 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:50,305 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-12 00:47:50,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 00:47:50,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:50,516 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:50,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:50,517 INFO L85 PathProgramCache]: Analyzing trace with hash 588071497, now seen corresponding path program 3 times [2023-11-12 00:47:50,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:50,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650181363] [2023-11-12 00:47:50,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:50,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:50,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:50,898 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 00:47:50,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:50,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650181363] [2023-11-12 00:47:50,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650181363] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:47:50,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725159055] [2023-11-12 00:47:50,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 00:47:50,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:50,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:47:50,903 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:47:50,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 00:47:50,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 00:47:50,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:47:50,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 00:47:50,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:47:51,150 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 00:47:51,150 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:47:51,355 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 00:47:51,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725159055] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:47:51,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [711176443] [2023-11-12 00:47:51,357 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-11-12 00:47:51,357 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:47:51,358 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:47:51,358 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:47:51,358 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:47:51,857 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:47:52,467 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2232#(and (= |ULTIMATE.start_main_~#v~0#1.offset| 0) (<= (+ (mod |ULTIMATE.start_main_~k~0#1| 4294967296) 1) (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)) (<= 1 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (- 4)))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (* |ULTIMATE.start_main_~k~0#1| 4)) |ULTIMATE.start_main_#t~mem14#1|) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= (+ |ULTIMATE.start_main_#t~mem14#1| 1) |ULTIMATE.start_main_#t~mem13#1|))' at error location [2023-11-12 00:47:52,468 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:47:52,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:47:52,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2023-11-12 00:47:52,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001451731] [2023-11-12 00:47:52,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:47:52,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-12 00:47:52,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:52,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-12 00:47:52,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2023-11-12 00:47:52,470 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:47:52,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:52,884 INFO L93 Difference]: Finished difference Result 108 states and 135 transitions. [2023-11-12 00:47:52,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 00:47:52,885 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-12 00:47:52,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:52,886 INFO L225 Difference]: With dead ends: 108 [2023-11-12 00:47:52,886 INFO L226 Difference]: Without dead ends: 77 [2023-11-12 00:47:52,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=162, Invalid=1098, Unknown=0, NotChecked=0, Total=1260 [2023-11-12 00:47:52,887 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 47 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:52,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 69 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:47:52,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-12 00:47:52,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 66. [2023-11-12 00:47:52,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 65 states have internal predecessors, (79), 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 00:47:52,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2023-11-12 00:47:52,906 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 24 [2023-11-12 00:47:52,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:52,907 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2023-11-12 00:47:52,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:47:52,907 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2023-11-12 00:47:52,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-12 00:47:52,908 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:52,909 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:47:52,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 00:47:53,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 00:47:53,114 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:53,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:53,115 INFO L85 PathProgramCache]: Analyzing trace with hash 803829790, now seen corresponding path program 1 times [2023-11-12 00:47:53,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:53,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208676940] [2023-11-12 00:47:53,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:53,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:53,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:54,977 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:47:54,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:54,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208676940] [2023-11-12 00:47:54,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208676940] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:47:54,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777020522] [2023-11-12 00:47:54,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:54,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:54,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:47:54,979 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:47:55,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8438904-8b9e-43e5-b92a-3a649694eea8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 00:47:55,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:55,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-12 00:47:55,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:47:55,235 INFO L351 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 27 treesize of output 15 [2023-11-12 00:47:55,269 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:47:55,270 INFO L351 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 1 case distinctions, treesize of input 27 treesize of output 25 [2023-11-12 00:47:55,334 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:47:55,335 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 28 [2023-11-12 00:47:55,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:47:55,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:47:55,415 INFO L322 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2023-11-12 00:47:55,416 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 34 [2023-11-12 00:47:55,540 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:47:55,540 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-11-12 00:47:55,560 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:47:55,561 INFO L327 TraceCheckSpWp]: Computing backward predicates...