./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array2_pattern.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_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/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_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array2_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/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_84236205-03cc-476e-a92a-a3315b88d4f9/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 1a25becec148beba97bef86c2a84619bb26dfafe7c127e8d70246837f0d2d470 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:12:10,535 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:12:10,653 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:12:10,664 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:12:10,665 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:12:10,706 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:12:10,707 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:12:10,707 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:12:10,708 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:12:10,716 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:12:10,716 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:12:10,716 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:12:10,717 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:12:10,719 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:12:10,719 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:12:10,720 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:12:10,720 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:12:10,720 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:12:10,721 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:12:10,722 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:12:10,722 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:12:10,723 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:12:10,724 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:12:10,724 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:12:10,725 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:12:10,725 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:12:10,726 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:12:10,726 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:12:10,726 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:12:10,727 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:12:10,728 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:12:10,728 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:12:10,729 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:12:10,729 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:12:10,729 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:12:10,729 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:12:10,730 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:12:10,730 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:12:10,730 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:12:10,730 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:12:10,731 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:12:10,731 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:12:10,731 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:12:10,731 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:12:10,732 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:12:10,732 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_84236205-03cc-476e-a92a-a3315b88d4f9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a25becec148beba97bef86c2a84619bb26dfafe7c127e8d70246837f0d2d470 [2023-11-12 00:12:11,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:12:11,122 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:12:11,125 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:12:11,126 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:12:11,127 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:12:11,129 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/array-patterns/array2_pattern.c [2023-11-12 00:12:14,190 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:12:14,410 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:12:14,410 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/sv-benchmarks/c/array-patterns/array2_pattern.c [2023-11-12 00:12:14,418 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/data/3b0cd26a7/419f7825ef7f41a394f200563d568b63/FLAG88e1c2711 [2023-11-12 00:12:14,432 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/data/3b0cd26a7/419f7825ef7f41a394f200563d568b63 [2023-11-12 00:12:14,434 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:12:14,436 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:12:14,437 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:12:14,437 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:12:14,442 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:12:14,443 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:12:14" (1/1) ... [2023-11-12 00:12:14,444 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bd93fec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:14, skipping insertion in model container [2023-11-12 00:12:14,444 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:12:14" (1/1) ... [2023-11-12 00:12:14,465 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:12:14,611 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/sv-benchmarks/c/array-patterns/array2_pattern.c[1322,1335] [2023-11-12 00:12:14,635 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:12:14,644 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:12:14,654 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_84236205-03cc-476e-a92a-a3315b88d4f9/sv-benchmarks/c/array-patterns/array2_pattern.c[1322,1335] [2023-11-12 00:12:14,665 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:12:14,684 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:12:14,684 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:14 WrapperNode [2023-11-12 00:12:14,685 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:12:14,686 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:12:14,686 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:12:14,686 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:12:14,693 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:14" (1/1) ... [2023-11-12 00:12:14,700 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:14" (1/1) ... [2023-11-12 00:12:14,722 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 82 [2023-11-12 00:12:14,722 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:12:14,723 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:12:14,723 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:12:14,723 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:12:14,733 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:14" (1/1) ... [2023-11-12 00:12:14,733 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:14" (1/1) ... [2023-11-12 00:12:14,736 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:14" (1/1) ... [2023-11-12 00:12:14,736 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:14" (1/1) ... [2023-11-12 00:12:14,743 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:14" (1/1) ... [2023-11-12 00:12:14,747 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:14" (1/1) ... [2023-11-12 00:12:14,748 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:14" (1/1) ... [2023-11-12 00:12:14,749 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:14" (1/1) ... [2023-11-12 00:12:14,752 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:12:14,753 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:12:14,753 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:12:14,753 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:12:14,754 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:14" (1/1) ... [2023-11-12 00:12:14,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:12:14,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:12:14,796 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:12:14,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:12:14,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:12:14,832 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 00:12:14,832 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 00:12:14,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:12:14,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:12:14,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:12:14,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:12:14,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:12:14,833 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:12:14,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:12:14,902 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:12:14,904 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:12:15,087 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:12:15,121 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:12:15,122 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-12 00:12:15,124 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:12:15 BoogieIcfgContainer [2023-11-12 00:12:15,124 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:12:15,127 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:12:15,128 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:12:15,131 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:12:15,131 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:12:14" (1/3) ... [2023-11-12 00:12:15,132 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20e2aaa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:12:15, skipping insertion in model container [2023-11-12 00:12:15,132 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:14" (2/3) ... [2023-11-12 00:12:15,133 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20e2aaa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:12:15, skipping insertion in model container [2023-11-12 00:12:15,133 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:12:15" (3/3) ... [2023-11-12 00:12:15,134 INFO L112 eAbstractionObserver]: Analyzing ICFG array2_pattern.c [2023-11-12 00:12:15,154 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:12:15,154 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:12:15,197 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:12:15,203 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;@3ea7bf05, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:12:15,203 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:12:15,207 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:12:15,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-12 00:12:15,214 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:12:15,215 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:12:15,215 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:12:15,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:12:15,220 INFO L85 PathProgramCache]: Analyzing trace with hash -348000308, now seen corresponding path program 1 times [2023-11-12 00:12:15,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:12:15,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069008715] [2023-11-12 00:12:15,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:15,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:12:15,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:12:15,410 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 00:12:15,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:12:15,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069008715] [2023-11-12 00:12:15,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069008715] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:12:15,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:12:15,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:12:15,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070580970] [2023-11-12 00:12:15,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:12:15,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 00:12:15,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:12:15,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 00:12:15,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:12:15,477 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:12:15,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:12:15,550 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2023-11-12 00:12:15,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 00:12:15,553 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-11-12 00:12:15,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:12:15,585 INFO L225 Difference]: With dead ends: 24 [2023-11-12 00:12:15,585 INFO L226 Difference]: Without dead ends: 15 [2023-11-12 00:12:15,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:12:15,595 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:12:15,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:12:15,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-12 00:12:15,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-12 00:12:15,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:12:15,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2023-11-12 00:12:15,675 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 11 [2023-11-12 00:12:15,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:12:15,676 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2023-11-12 00:12:15,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:12:15,677 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2023-11-12 00:12:15,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-12 00:12:15,678 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:12:15,678 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:12:15,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:12:15,679 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:12:15,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:12:15,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1400754714, now seen corresponding path program 1 times [2023-11-12 00:12:15,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:12:15,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689940772] [2023-11-12 00:12:15,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:15,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:12:15,738 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:12:15,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1965930265] [2023-11-12 00:12:15,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:15,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:12:15,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:12:15,745 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:12:15,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:12:15,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:12:15,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 00:12:15,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:12:15,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:12:15,987 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:12:15,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:12:15,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689940772] [2023-11-12 00:12:15,988 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:12:15,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965930265] [2023-11-12 00:12:15,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965930265] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:12:15,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:12:15,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:12:15,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089802880] [2023-11-12 00:12:15,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:12:15,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:12:15,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:12:15,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:12:15,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:12:15,994 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:12:16,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:12:16,033 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2023-11-12 00:12:16,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:12:16,034 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-11-12 00:12:16,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:12:16,035 INFO L225 Difference]: With dead ends: 19 [2023-11-12 00:12:16,036 INFO L226 Difference]: Without dead ends: 16 [2023-11-12 00:12:16,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 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 00:12:16,038 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:12:16,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 28 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:12:16,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-12 00:12:16,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-11-12 00:12:16,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:12:16,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2023-11-12 00:12:16,046 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 16 [2023-11-12 00:12:16,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:12:16,046 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2023-11-12 00:12:16,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:12:16,047 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2023-11-12 00:12:16,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-12 00:12:16,048 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:12:16,048 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:12:16,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:12:16,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:12:16,253 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:12:16,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:12:16,255 INFO L85 PathProgramCache]: Analyzing trace with hash 473487722, now seen corresponding path program 1 times [2023-11-12 00:12:16,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:12:16,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564597015] [2023-11-12 00:12:16,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:16,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:12:16,292 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:12:16,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1737557553] [2023-11-12 00:12:16,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:16,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:12:16,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:12:16,299 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:12:16,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:12:16,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:12:16,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 00:12:16,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:12:16,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:12:16,479 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:12:16,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:12:16,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564597015] [2023-11-12 00:12:16,489 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:12:16,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737557553] [2023-11-12 00:12:16,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737557553] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:12:16,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:12:16,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:12:16,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589194813] [2023-11-12 00:12:16,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:12:16,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:12:16,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:12:16,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:12:16,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:12:16,494 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:12:16,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:12:16,583 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2023-11-12 00:12:16,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:12:16,584 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-11-12 00:12:16,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:12:16,585 INFO L225 Difference]: With dead ends: 29 [2023-11-12 00:12:16,586 INFO L226 Difference]: Without dead ends: 17 [2023-11-12 00:12:16,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:12:16,593 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:12:16,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 30 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:12:16,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-12 00:12:16,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-12 00:12:16,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:12:16,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2023-11-12 00:12:16,608 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 17 [2023-11-12 00:12:16,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:12:16,608 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2023-11-12 00:12:16,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:12:16,609 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2023-11-12 00:12:16,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-12 00:12:16,611 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:12:16,611 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:12:16,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:12:16,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:12:16,818 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:12:16,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:12:16,819 INFO L85 PathProgramCache]: Analyzing trace with hash 199414858, now seen corresponding path program 1 times [2023-11-12 00:12:16,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:12:16,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838133450] [2023-11-12 00:12:16,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:16,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:12:16,875 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:12:16,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1760903703] [2023-11-12 00:12:16,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:16,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:12:16,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:12:16,881 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:12:16,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:12:17,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:12:17,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-12 00:12:17,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:12:17,139 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-12 00:12:17,240 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-12 00:12:17,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:12:17,917 INFO L322 Elim1Store]: treesize reduction 100, result has 13.0 percent of original size [2023-11-12 00:12:17,918 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 41 [2023-11-12 00:12:18,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:12:18,205 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:12:27,200 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse11 (mod (+ c_~ARR_SIZE~0 4294967295) 4294967296))) (let ((.cse7 (* .cse11 4)) (.cse8 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|))) (and (forall ((v_z_1 Int)) (let ((.cse10 (+ .cse11 v_z_1))) (or (forall ((v_y_1 Int)) (let ((.cse0 (* 4294967295 v_z_1)) (.cse1 (* v_y_1 4294967296))) (let ((.cse2 (+ .cse0 .cse1))) (or (< c_~ARR_SIZE~0 (+ .cse0 .cse1 1)) (< .cse2 0) (= (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse9 (+ (* 17179869180 v_z_1) (* 17179869184 v_y_1) |c_ULTIMATE.start_main_~#array1~0#1.offset|))) (store .cse8 .cse9 (+ (* .cse2 |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|) (select .cse8 .cse9))))))) (let ((.cse4 (let ((.cse5 (select .cse3 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse6 (+ (* v_z_1 4) (- 17179869184) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse7))) (store .cse5 .cse6 (+ (* .cse2 |c_ULTIMATE.start_main_~num~0#1|) (select .cse5 .cse6)))))) (+ |c_ULTIMATE.start_main_~sum~0#1| (select (select (store .cse3 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse4) |c_ULTIMATE.start_main_~#array1~0#1.base|) |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse4 |c_ULTIMATE.start_main_~#array2~0#1.offset|)))) 0))))) (< v_z_1 0) (< .cse10 2147483648) (< 4294967295 .cse10)))) (forall ((v_z_1 Int)) (or (< (+ .cse11 v_z_1) 6442450944) (forall ((v_y_1 Int)) (let ((.cse12 (* 4294967295 v_z_1)) (.cse13 (* v_y_1 4294967296))) (let ((.cse14 (+ .cse12 .cse13))) (or (< c_~ARR_SIZE~0 (+ .cse12 .cse13 1)) (< .cse14 0) (= (let ((.cse15 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse19 (+ (* 17179869180 v_z_1) (* 17179869184 v_y_1) |c_ULTIMATE.start_main_~#array1~0#1.offset|))) (store .cse8 .cse19 (+ (* .cse14 |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|) (select .cse8 .cse19))))))) (let ((.cse16 (let ((.cse17 (select .cse15 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse18 (+ (* v_z_1 4) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse7 (- 34359738368)))) (store .cse17 .cse18 (+ (* .cse14 |c_ULTIMATE.start_main_~num~0#1|) (select .cse17 .cse18)))))) (+ (select (select (store .cse15 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse16) |c_ULTIMATE.start_main_~#array1~0#1.base|) |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse16 |c_ULTIMATE.start_main_~#array2~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1|))) 0))))) (< 4294967295 v_z_1))) (forall ((v_z_3 Int)) (let ((.cse20 (+ .cse11 v_z_3))) (or (< .cse20 4294967296) (< 4294967295 v_z_3) (< 6442450943 .cse20) (forall ((v_y_3 Int)) (let ((.cse27 (* 4294967295 v_z_3)) (.cse28 (* v_y_3 4294967296))) (let ((.cse25 (+ .cse27 .cse28))) (or (= (let ((.cse22 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse26 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (* 17179869180 v_z_3) (* 17179869184 v_y_3)))) (store .cse8 .cse26 (+ (* .cse25 |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|) (select .cse8 .cse26))))))) (let ((.cse21 (let ((.cse23 (select .cse22 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse24 (+ (- 17179869184) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse7 (* v_z_3 4)))) (store .cse23 .cse24 (+ (select .cse23 .cse24) (* .cse25 |c_ULTIMATE.start_main_~num~0#1|)))))) (+ |c_ULTIMATE.start_main_~sum~0#1| (select .cse21 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select (select (store .cse22 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse21) |c_ULTIMATE.start_main_~#array1~0#1.base|) |c_ULTIMATE.start_main_~#array1~0#1.offset|)))) 0) (< c_~ARR_SIZE~0 (+ .cse27 .cse28 1)) (< .cse25 0)))))))) (forall ((v_z_1 Int)) (let ((.cse41 (+ .cse11 v_z_1))) (or (forall ((v_y_1 Int)) (let ((.cse29 (* 4294967295 v_z_1)) (.cse30 (* v_y_1 4294967296))) (let ((.cse31 (+ .cse29 .cse30))) (let ((.cse32 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse40 (+ (* 17179869180 v_z_1) (* 17179869184 v_y_1) |c_ULTIMATE.start_main_~#array1~0#1.offset|))) (store .cse8 .cse40 (+ (* .cse31 |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|) (select .cse8 .cse40))))))) (let ((.cse36 (* .cse31 |c_ULTIMATE.start_main_~num~0#1|)) (.cse34 (select .cse32 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse37 (* v_z_1 4))) (or (< c_~ARR_SIZE~0 (+ .cse29 .cse30 1)) (< .cse31 0) (= (let ((.cse33 (let ((.cse35 (+ .cse37 |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse7 (- 34359738368)))) (store .cse34 .cse35 (+ .cse36 (select .cse34 .cse35)))))) (+ (select (select (store .cse32 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse33) |c_ULTIMATE.start_main_~#array1~0#1.base|) |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse33 |c_ULTIMATE.start_main_~#array2~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1|)) 0) (= (let ((.cse38 (let ((.cse39 (+ .cse37 (- 17179869184) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse7))) (store .cse34 .cse39 (+ .cse36 (select .cse34 .cse39)))))) (+ |c_ULTIMATE.start_main_~sum~0#1| (select (select (store .cse32 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse38) |c_ULTIMATE.start_main_~#array1~0#1.base|) |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse38 |c_ULTIMATE.start_main_~#array2~0#1.offset|))) 0))))))) (< v_z_1 0) (< .cse41 2147483648) (< 4294967295 .cse41)))) (forall ((v_z_3 Int)) (or (forall ((v_y_3 Int)) (let ((.cse42 (* 4294967295 v_z_3)) (.cse43 (* v_y_3 4294967296))) (let ((.cse44 (+ .cse42 .cse43))) (or (< c_~ARR_SIZE~0 (+ .cse42 .cse43 1)) (< .cse44 0) (= 0 (let ((.cse45 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse49 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (* 17179869180 v_z_3) (* 17179869184 v_y_3)))) (store .cse8 .cse49 (+ (* .cse44 |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|) (select .cse8 .cse49))))))) (let ((.cse46 (let ((.cse47 (select .cse45 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse48 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse7 (* v_z_3 4)))) (store .cse47 .cse48 (+ (select .cse47 .cse48) (* .cse44 |c_ULTIMATE.start_main_~num~0#1|)))))) (+ (select (select (store .cse45 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse46) |c_ULTIMATE.start_main_~#array1~0#1.base|) |c_ULTIMATE.start_main_~#array1~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1| (select .cse46 |c_ULTIMATE.start_main_~#array2~0#1.offset|))))))))) (< 2147483647 (+ .cse11 v_z_3)) (< v_z_3 0))) (forall ((v_z_3 Int)) (or (forall ((v_y_3 Int)) (let ((.cse56 (* 4294967295 v_z_3)) (.cse57 (* v_y_3 4294967296))) (let ((.cse58 (+ .cse56 .cse57))) (let ((.cse51 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse61 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (* 17179869180 v_z_3) (* 17179869184 v_y_3)))) (store .cse8 .cse61 (+ (* .cse58 |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|) (select .cse8 .cse61))))))) (let ((.cse52 (select .cse51 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse54 (* .cse58 |c_ULTIMATE.start_main_~num~0#1|)) (.cse55 (* v_z_3 4))) (or (= (let ((.cse50 (let ((.cse53 (+ (- 17179869184) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse7 .cse55))) (store .cse52 .cse53 (+ (select .cse52 .cse53) .cse54))))) (+ |c_ULTIMATE.start_main_~sum~0#1| (select .cse50 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select (select (store .cse51 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse50) |c_ULTIMATE.start_main_~#array1~0#1.base|) |c_ULTIMATE.start_main_~#array1~0#1.offset|))) 0) (< c_~ARR_SIZE~0 (+ .cse56 .cse57 1)) (< .cse58 0) (= 0 (let ((.cse59 (let ((.cse60 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse7 .cse55))) (store .cse52 .cse60 (+ (select .cse52 .cse60) .cse54))))) (+ (select (select (store .cse51 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse59) |c_ULTIMATE.start_main_~#array1~0#1.base|) |c_ULTIMATE.start_main_~#array1~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1| (select .cse59 |c_ULTIMATE.start_main_~#array2~0#1.offset|)))))))))) (< 2147483647 (+ .cse11 v_z_3)) (< v_z_3 0))) (forall ((v_z_3 Int)) (let ((.cse62 (+ .cse11 v_z_3))) (or (< .cse62 4294967296) (< 4294967295 v_z_3) (forall ((v_y_3 Int)) (let ((.cse69 (* 4294967295 v_z_3)) (.cse70 (* v_y_3 4294967296))) (let ((.cse71 (+ .cse69 .cse70))) (let ((.cse64 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse74 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (* 17179869180 v_z_3) (* 17179869184 v_y_3)))) (store .cse8 .cse74 (+ (* .cse71 |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|) (select .cse8 .cse74))))))) (let ((.cse65 (select .cse64 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse67 (* .cse71 |c_ULTIMATE.start_main_~num~0#1|)) (.cse68 (* v_z_3 4))) (or (= (let ((.cse63 (let ((.cse66 (+ (- 17179869184) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse7 .cse68))) (store .cse65 .cse66 (+ (select .cse65 .cse66) .cse67))))) (+ |c_ULTIMATE.start_main_~sum~0#1| (select .cse63 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select (select (store .cse64 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse63) |c_ULTIMATE.start_main_~#array1~0#1.base|) |c_ULTIMATE.start_main_~#array1~0#1.offset|))) 0) (< c_~ARR_SIZE~0 (+ .cse69 .cse70 1)) (< .cse71 0) (= 0 (let ((.cse72 (let ((.cse73 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse7 .cse68))) (store .cse65 .cse73 (+ (select .cse65 .cse73) .cse67))))) (+ (select (select (store .cse64 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse72) |c_ULTIMATE.start_main_~#array1~0#1.base|) |c_ULTIMATE.start_main_~#array1~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1| (select .cse72 |c_ULTIMATE.start_main_~#array2~0#1.offset|)))))))))) (< 6442450943 .cse62)))) (forall ((v_z_1 Int)) (or (forall ((v_y_1 Int)) (let ((.cse75 (* 4294967295 v_z_1)) (.cse76 (* v_y_1 4294967296))) (let ((.cse77 (+ .cse75 .cse76))) (let ((.cse78 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse86 (+ (* 17179869180 v_z_1) (* 17179869184 v_y_1) |c_ULTIMATE.start_main_~#array1~0#1.offset|))) (store .cse8 .cse86 (+ (* .cse77 |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|) (select .cse8 .cse86))))))) (let ((.cse82 (* .cse77 |c_ULTIMATE.start_main_~num~0#1|)) (.cse80 (select .cse78 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse83 (* v_z_1 4))) (or (< c_~ARR_SIZE~0 (+ .cse75 .cse76 1)) (< .cse77 0) (= (let ((.cse79 (let ((.cse81 (+ .cse83 |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse7 (- 34359738368)))) (store .cse80 .cse81 (+ .cse82 (select .cse80 .cse81)))))) (+ (select (select (store .cse78 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse79) |c_ULTIMATE.start_main_~#array1~0#1.base|) |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse79 |c_ULTIMATE.start_main_~#array2~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1|)) 0) (= (let ((.cse84 (let ((.cse85 (+ .cse83 (- 17179869184) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse7))) (store .cse80 .cse85 (+ .cse82 (select .cse80 .cse85)))))) (+ |c_ULTIMATE.start_main_~sum~0#1| (select (select (store .cse78 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse84) |c_ULTIMATE.start_main_~#array1~0#1.base|) |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse84 |c_ULTIMATE.start_main_~#array2~0#1.offset|))) 0))))))) (< (+ .cse11 v_z_1) 6442450944) (< 4294967295 v_z_1)))))) is different from true [2023-11-12 00:12:27,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:12:27,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838133450] [2023-11-12 00:12:27,211 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:12:27,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760903703] [2023-11-12 00:12:27,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760903703] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:12:27,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1009530832] [2023-11-12 00:12:27,235 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 00:12:27,235 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:12:27,239 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:12:27,246 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:12:27,246 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:12:27,891 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-12 00:12:27,893 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:12:29,349 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '392#(and (<= |ULTIMATE.start_main_~index~0#1| 32766) (= |ULTIMATE.start_main_~temp~0#1| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~index~0#1|) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (<= 2 |ULTIMATE.start_main_~#array1~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 2 |ULTIMATE.start_main_~#array2~0#1.base|) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 32767) (<= 1 ~ARR_SIZE~0))' at error location [2023-11-12 00:12:29,349 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:12:29,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:12:29,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-11-12 00:12:29,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152316464] [2023-11-12 00:12:29,350 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-12 00:12:29,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 00:12:29,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:12:29,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 00:12:29,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=4, NotChecked=56, Total=930 [2023-11-12 00:12:29,352 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 14 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:12:30,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:12:30,187 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2023-11-12 00:12:30,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-12 00:12:30,188 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-11-12 00:12:30,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:12:30,192 INFO L225 Difference]: With dead ends: 40 [2023-11-12 00:12:30,193 INFO L226 Difference]: Without dead ends: 37 [2023-11-12 00:12:30,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=208, Invalid=1124, Unknown=4, NotChecked=70, Total=1406 [2023-11-12 00:12:30,199 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 47 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:12:30,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 62 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:12:30,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-12 00:12:30,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2023-11-12 00:12:30,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 00:12:30,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-11-12 00:12:30,222 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 18 [2023-11-12 00:12:30,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:12:30,222 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-11-12 00:12:30,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:12:30,223 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-11-12 00:12:30,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-12 00:12:30,224 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:12:30,224 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:12:30,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:12:30,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:12:30,431 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:12:30,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:12:30,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1886657850, now seen corresponding path program 2 times [2023-11-12 00:12:30,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:12:30,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047262672] [2023-11-12 00:12:30,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:30,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:12:30,455 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:12:30,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1432795114] [2023-11-12 00:12:30,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:12:30,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:12:30,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:12:30,458 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:12:30,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:12:30,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 00:12:30,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:12:30,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 00:12:30,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:12:30,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:12:30,672 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:12:30,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:12:30,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:12:30,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047262672] [2023-11-12 00:12:30,735 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:12:30,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432795114] [2023-11-12 00:12:30,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432795114] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:12:30,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [902393466] [2023-11-12 00:12:30,739 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 00:12:30,739 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:12:30,740 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:12:30,740 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:12:30,740 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:12:31,233 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-12 00:12:31,234 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:12:32,164 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '636#(and (<= |ULTIMATE.start_main_~index~0#1| 32766) (= |ULTIMATE.start_main_~temp~0#1| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~index~0#1|) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (<= 2 |ULTIMATE.start_main_~#array1~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 2 |ULTIMATE.start_main_~#array2~0#1.base|) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 32767) (<= 1 ~ARR_SIZE~0))' at error location [2023-11-12 00:12:32,164 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:12:32,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:12:32,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-11-12 00:12:32,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857393813] [2023-11-12 00:12:32,166 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:12:32,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 00:12:32,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:12:32,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 00:12:32,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-11-12 00:12:32,168 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 00:12:32,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:12:32,330 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2023-11-12 00:12:32,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 00:12:32,331 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2023-11-12 00:12:32,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:12:32,331 INFO L225 Difference]: With dead ends: 37 [2023-11-12 00:12:32,332 INFO L226 Difference]: Without dead ends: 24 [2023-11-12 00:12:32,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2023-11-12 00:12:32,333 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 23 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:12:32,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 44 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:12:32,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-12 00:12:32,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2023-11-12 00:12:32,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:12:32,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2023-11-12 00:12:32,341 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 19 [2023-11-12 00:12:32,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:12:32,342 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2023-11-12 00:12:32,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 00:12:32,342 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2023-11-12 00:12:32,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-12 00:12:32,343 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:12:32,343 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:12:32,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:12:32,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:12:32,550 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:12:32,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:12:32,550 INFO L85 PathProgramCache]: Analyzing trace with hash 293090666, now seen corresponding path program 3 times [2023-11-12 00:12:32,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:12:32,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064812044] [2023-11-12 00:12:32,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:32,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:12:32,579 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:12:32,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1361742251] [2023-11-12 00:12:32,579 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 00:12:32,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:12:32,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:12:32,581 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:12:32,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:12:32,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 00:12:32,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:12:32,679 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 00:12:32,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:12:32,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:12:32,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:12:32,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:12:32,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:12:32,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064812044] [2023-11-12 00:12:32,809 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:12:32,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361742251] [2023-11-12 00:12:32,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361742251] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:12:32,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2129850216] [2023-11-12 00:12:32,813 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 00:12:32,813 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:12:32,814 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:12:32,814 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:12:32,814 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:12:33,302 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-12 00:12:33,303 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:12:34,186 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '855#(and (<= |ULTIMATE.start_main_~index~0#1| 32766) (= |ULTIMATE.start_main_~temp~0#1| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~index~0#1|) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (<= 2 |ULTIMATE.start_main_~#array1~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 2 |ULTIMATE.start_main_~#array2~0#1.base|) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 32767) (<= 1 ~ARR_SIZE~0))' at error location [2023-11-12 00:12:34,187 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:12:34,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:12:34,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-11-12 00:12:34,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320480320] [2023-11-12 00:12:34,187 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:12:34,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 00:12:34,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:12:34,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 00:12:34,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=340, Unknown=3, NotChecked=0, Total=420 [2023-11-12 00:12:34,189 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 00:12:34,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:12:34,304 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2023-11-12 00:12:34,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:12:34,305 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2023-11-12 00:12:34,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:12:34,306 INFO L225 Difference]: With dead ends: 24 [2023-11-12 00:12:34,306 INFO L226 Difference]: Without dead ends: 21 [2023-11-12 00:12:34,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=98, Invalid=451, Unknown=3, NotChecked=0, Total=552 [2023-11-12 00:12:34,308 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 14 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:12:34,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 27 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:12:34,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-12 00:12:34,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-12 00:12:34,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:12:34,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-11-12 00:12:34,315 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 19 [2023-11-12 00:12:34,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:12:34,316 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-11-12 00:12:34,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 00:12:34,316 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-11-12 00:12:34,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 00:12:34,317 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:12:34,317 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:12:34,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 00:12:34,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:12:34,524 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:12:34,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:12:34,524 INFO L85 PathProgramCache]: Analyzing trace with hash 495640602, now seen corresponding path program 4 times [2023-11-12 00:12:34,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:12:34,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393766230] [2023-11-12 00:12:34,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:34,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:12:34,549 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:12:34,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [16718687] [2023-11-12 00:12:34,549 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 00:12:34,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:12:34,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:12:34,563 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:12:34,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 00:12:34,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:12:34,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-12 00:12:34,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:12:34,760 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-12 00:12:34,821 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-12 00:12:34,913 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2023-11-12 00:12:35,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:12:35,704 INFO L322 Elim1Store]: treesize reduction 353, result has 14.1 percent of original size [2023-11-12 00:12:35,704 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 6 disjoint index pairs (out of 55 index pairs), introduced 12 new quantified variables, introduced 38 case distinctions, treesize of input 212 treesize of output 214 [2023-11-12 00:12:35,866 INFO L322 Elim1Store]: treesize reduction 40, result has 46.7 percent of original size [2023-11-12 00:12:35,867 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 184 [2023-11-12 00:12:35,980 INFO L322 Elim1Store]: treesize reduction 94, result has 1.1 percent of original size [2023-11-12 00:12:35,980 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 96 treesize of output 157 [2023-11-12 00:12:36,153 INFO L322 Elim1Store]: treesize reduction 95, result has 22.8 percent of original size [2023-11-12 00:12:36,153 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 124 treesize of output 70 [2023-11-12 00:12:36,451 INFO L322 Elim1Store]: treesize reduction 75, result has 27.2 percent of original size [2023-11-12 00:12:36,451 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 51 [2023-11-12 00:12:36,820 INFO L322 Elim1Store]: treesize reduction 77, result has 18.9 percent of original size [2023-11-12 00:12:36,820 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 113 treesize of output 87 [2023-11-12 00:12:37,489 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 29 [2023-11-12 00:12:37,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:12:37,543 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:12:50,525 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse13 (mod (+ c_~ARR_SIZE~0 4294967295) 4294967296))) (let ((.cse3 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (.cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (.cse8 (* .cse13 4)) (.cse9 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|))) (and (forall ((v_z_7 Int)) (or (forall ((v_y_7 Int)) (let ((.cse11 (* v_y_7 4294967296)) (.cse12 (* 4294967295 v_z_7))) (let ((.cse7 (+ .cse11 .cse12))) (or (= 0 (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse10 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (* 17179869180 v_z_7) (* 17179869184 v_y_7)))) (store .cse9 .cse10 (+ (* .cse7 |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|) (select .cse9 .cse10))))))) (let ((.cse2 (let ((.cse5 (select .cse4 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse6 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse8 (- 34359738368) (* v_z_7 4)))) (store .cse5 .cse6 (+ (select .cse5 .cse6) (* .cse7 |c_ULTIMATE.start_main_~num~0#1|)))))) (let ((.cse0 (select (store .cse4 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse2) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse0 .cse1) (select .cse2 .cse3) |c_ULTIMATE.start_main_~sum~0#1| (select .cse0 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse2 |c_ULTIMATE.start_main_~#array2~0#1.offset|)))))) (< .cse7 0) (< c_~ARR_SIZE~0 (+ .cse11 .cse12 1)))))) (< (+ .cse13 v_z_7) 6442450944) (< 4294967295 v_z_7))) (forall ((v_z_7 Int)) (or (< (+ .cse13 v_z_7) 6442450944) (forall ((v_y_7 Int)) (let ((.cse25 (* v_y_7 4294967296)) (.cse26 (* 4294967295 v_z_7))) (let ((.cse24 (+ .cse25 .cse26))) (let ((.cse16 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse27 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (* 17179869180 v_z_7) (* 17179869184 v_y_7)))) (store .cse9 .cse27 (+ (* .cse24 |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|) (select .cse9 .cse27))))))) (let ((.cse17 (select .cse16 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse19 (* .cse24 |c_ULTIMATE.start_main_~num~0#1|)) (.cse20 (* v_z_7 4))) (or (= 0 (let ((.cse15 (let ((.cse18 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse8 (- 34359738368) .cse20))) (store .cse17 .cse18 (+ (select .cse17 .cse18) .cse19))))) (let ((.cse14 (select (store .cse16 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse15) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse14 .cse1) (select .cse15 .cse3) |c_ULTIMATE.start_main_~sum~0#1| (select .cse14 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse15 |c_ULTIMATE.start_main_~#array2~0#1.offset|))))) (= (let ((.cse21 (let ((.cse23 (+ (- 17179869184) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse8 .cse20))) (store .cse17 .cse23 (+ (select .cse17 .cse23) .cse19))))) (let ((.cse22 (select (store .cse16 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse21) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse21 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse21 .cse3) (select .cse22 .cse1) |c_ULTIMATE.start_main_~sum~0#1| (select .cse22 |c_ULTIMATE.start_main_~#array1~0#1.offset|)))) 0) (< .cse24 0) (< c_~ARR_SIZE~0 (+ .cse25 .cse26 1)))))))) (< 4294967295 v_z_7))) (forall ((v_z_7 Int)) (let ((.cse28 (+ .cse13 v_z_7))) (or (< 4294967295 .cse28) (< v_z_7 0) (forall ((v_y_7 Int)) (let ((.cse36 (* v_y_7 4294967296)) (.cse37 (* 4294967295 v_z_7))) (let ((.cse34 (+ .cse36 .cse37))) (or (= (let ((.cse31 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse35 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (* 17179869180 v_z_7) (* 17179869184 v_y_7)))) (store .cse9 .cse35 (+ (* .cse34 |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|) (select .cse9 .cse35))))))) (let ((.cse29 (let ((.cse32 (select .cse31 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse33 (+ (- 17179869184) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse8 (* v_z_7 4)))) (store .cse32 .cse33 (+ (select .cse32 .cse33) (* .cse34 |c_ULTIMATE.start_main_~num~0#1|)))))) (let ((.cse30 (select (store .cse31 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse29) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse29 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse29 .cse3) (select .cse30 .cse1) |c_ULTIMATE.start_main_~sum~0#1| (select .cse30 |c_ULTIMATE.start_main_~#array1~0#1.offset|))))) 0) (< .cse34 0) (< c_~ARR_SIZE~0 (+ .cse36 .cse37 1)))))) (< .cse28 2147483648)))) (forall ((v_z_9 Int)) (or (< v_z_9 0) (< 2147483647 (+ .cse13 v_z_9)) (forall ((v_y_9 Int)) (let ((.cse49 (* v_y_9 4294967296)) (.cse50 (* 4294967295 v_z_9))) (let ((.cse48 (+ .cse49 .cse50))) (let ((.cse40 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse51 (+ (* 17179869184 v_y_9) |c_ULTIMATE.start_main_~#array1~0#1.offset| (* 17179869180 v_z_9)))) (store .cse9 .cse51 (+ (select .cse9 .cse51) (* .cse48 |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|))))))) (let ((.cse41 (select .cse40 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse43 (* .cse48 |c_ULTIMATE.start_main_~num~0#1|)) (.cse44 (* v_z_9 4))) (or (= (let ((.cse38 (let ((.cse42 (+ (- 17179869184) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse44 .cse8))) (store .cse41 .cse42 (+ (select .cse41 .cse42) .cse43))))) (let ((.cse39 (select (store .cse40 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse38) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ |c_ULTIMATE.start_main_~sum~0#1| (select .cse38 .cse3) (select .cse39 .cse1) (select .cse38 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse39 |c_ULTIMATE.start_main_~#array1~0#1.offset|)))) 0) (= (let ((.cse46 (let ((.cse47 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse44 .cse8))) (store .cse41 .cse47 (+ (select .cse41 .cse47) .cse43))))) (let ((.cse45 (select (store .cse40 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse46) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ |c_ULTIMATE.start_main_~sum~0#1| (select .cse45 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse46 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse45 .cse1) (select .cse46 .cse3)))) 0) (< .cse48 0) (< c_~ARR_SIZE~0 (+ .cse49 1 .cse50)))))))))) (forall ((v_z_9 Int)) (let ((.cse52 (+ .cse13 v_z_9))) (or (< .cse52 4294967296) (< 6442450943 .cse52) (< 4294967295 v_z_9) (forall ((v_y_9 Int)) (let ((.cse60 (* v_y_9 4294967296)) (.cse61 (* 4294967295 v_z_9))) (let ((.cse58 (+ .cse60 .cse61))) (or (= (let ((.cse55 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse59 (+ (* 17179869184 v_y_9) |c_ULTIMATE.start_main_~#array1~0#1.offset| (* 17179869180 v_z_9)))) (store .cse9 .cse59 (+ (select .cse9 .cse59) (* .cse58 |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|))))))) (let ((.cse53 (let ((.cse56 (select .cse55 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse57 (+ (- 17179869184) |c_ULTIMATE.start_main_~#array2~0#1.offset| (* v_z_9 4) .cse8))) (store .cse56 .cse57 (+ (select .cse56 .cse57) (* .cse58 |c_ULTIMATE.start_main_~num~0#1|)))))) (let ((.cse54 (select (store .cse55 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse53) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ |c_ULTIMATE.start_main_~sum~0#1| (select .cse53 .cse3) (select .cse54 .cse1) (select .cse53 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse54 |c_ULTIMATE.start_main_~#array1~0#1.offset|))))) 0) (< .cse58 0) (< c_~ARR_SIZE~0 (+ .cse60 1 .cse61))))))))) (forall ((v_z_9 Int)) (or (< v_z_9 0) (< 2147483647 (+ .cse13 v_z_9)) (forall ((v_y_9 Int)) (let ((.cse69 (* v_y_9 4294967296)) (.cse70 (* 4294967295 v_z_9))) (let ((.cse67 (+ .cse69 .cse70))) (or (= (let ((.cse64 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse68 (+ (* 17179869184 v_y_9) |c_ULTIMATE.start_main_~#array1~0#1.offset| (* 17179869180 v_z_9)))) (store .cse9 .cse68 (+ (select .cse9 .cse68) (* .cse67 |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|))))))) (let ((.cse63 (let ((.cse65 (select .cse64 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse66 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| (* v_z_9 4) .cse8))) (store .cse65 .cse66 (+ (select .cse65 .cse66) (* .cse67 |c_ULTIMATE.start_main_~num~0#1|)))))) (let ((.cse62 (select (store .cse64 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse63) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ |c_ULTIMATE.start_main_~sum~0#1| (select .cse62 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse63 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse62 .cse1) (select .cse63 .cse3))))) 0) (< .cse67 0) (< c_~ARR_SIZE~0 (+ .cse69 1 .cse70)))))))) (forall ((v_z_9 Int)) (let ((.cse71 (+ .cse13 v_z_9))) (or (< .cse71 4294967296) (forall ((v_y_9 Int)) (let ((.cse83 (* v_y_9 4294967296)) (.cse84 (* 4294967295 v_z_9))) (let ((.cse82 (+ .cse83 .cse84))) (let ((.cse74 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse85 (+ (* 17179869184 v_y_9) |c_ULTIMATE.start_main_~#array1~0#1.offset| (* 17179869180 v_z_9)))) (store .cse9 .cse85 (+ (select .cse9 .cse85) (* .cse82 |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|))))))) (let ((.cse75 (select .cse74 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse77 (* .cse82 |c_ULTIMATE.start_main_~num~0#1|)) (.cse78 (* v_z_9 4))) (or (= (let ((.cse72 (let ((.cse76 (+ (- 17179869184) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse78 .cse8))) (store .cse75 .cse76 (+ (select .cse75 .cse76) .cse77))))) (let ((.cse73 (select (store .cse74 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse72) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ |c_ULTIMATE.start_main_~sum~0#1| (select .cse72 .cse3) (select .cse73 .cse1) (select .cse72 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse73 |c_ULTIMATE.start_main_~#array1~0#1.offset|)))) 0) (= (let ((.cse80 (let ((.cse81 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse78 .cse8))) (store .cse75 .cse81 (+ (select .cse75 .cse81) .cse77))))) (let ((.cse79 (select (store .cse74 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse80) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ |c_ULTIMATE.start_main_~sum~0#1| (select .cse79 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse80 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse79 .cse1) (select .cse80 .cse3)))) 0) (< .cse82 0) (< c_~ARR_SIZE~0 (+ .cse83 1 .cse84)))))))) (< 6442450943 .cse71) (< 4294967295 v_z_9)))) (forall ((v_z_7 Int)) (let ((.cse86 (+ .cse13 v_z_7))) (or (< 4294967295 .cse86) (< v_z_7 0) (forall ((v_y_7 Int)) (let ((.cse98 (* v_y_7 4294967296)) (.cse99 (* 4294967295 v_z_7))) (let ((.cse97 (+ .cse98 .cse99))) (let ((.cse89 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse100 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (* 17179869180 v_z_7) (* 17179869184 v_y_7)))) (store .cse9 .cse100 (+ (* .cse97 |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|) (select .cse9 .cse100))))))) (let ((.cse90 (select .cse89 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse92 (* .cse97 |c_ULTIMATE.start_main_~num~0#1|)) (.cse93 (* v_z_7 4))) (or (= 0 (let ((.cse88 (let ((.cse91 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse8 (- 34359738368) .cse93))) (store .cse90 .cse91 (+ (select .cse90 .cse91) .cse92))))) (let ((.cse87 (select (store .cse89 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse88) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse87 .cse1) (select .cse88 .cse3) |c_ULTIMATE.start_main_~sum~0#1| (select .cse87 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse88 |c_ULTIMATE.start_main_~#array2~0#1.offset|))))) (= (let ((.cse94 (let ((.cse96 (+ (- 17179869184) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse8 .cse93))) (store .cse90 .cse96 (+ (select .cse90 .cse96) .cse92))))) (let ((.cse95 (select (store .cse89 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse94) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse94 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse94 .cse3) (select .cse95 .cse1) |c_ULTIMATE.start_main_~sum~0#1| (select .cse95 |c_ULTIMATE.start_main_~#array1~0#1.offset|)))) 0) (< .cse97 0) (< c_~ARR_SIZE~0 (+ .cse98 .cse99 1)))))))) (< .cse86 2147483648))))))) is different from true [2023-11-12 00:12:50,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:12:50,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393766230] [2023-11-12 00:12:50,533 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:12:50,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16718687] [2023-11-12 00:12:50,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16718687] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:12:50,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2101641915] [2023-11-12 00:12:50,537 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 00:12:50,537 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:12:50,537 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:12:50,537 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:12:50,538 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:12:50,970 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-12 00:12:50,972 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:12:56,697 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1048#(and (<= |ULTIMATE.start_main_~index~0#1| 32766) (= |ULTIMATE.start_main_~temp~0#1| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~index~0#1|) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (<= 2 |ULTIMATE.start_main_~#array1~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 2 |ULTIMATE.start_main_~#array2~0#1.base|) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 32767) (<= 1 ~ARR_SIZE~0))' at error location [2023-11-12 00:12:56,697 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:12:56,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:12:56,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-11-12 00:12:56,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447677473] [2023-11-12 00:12:56,698 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-12 00:12:56,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-12 00:12:56,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:12:56,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-12 00:12:56,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1029, Unknown=6, NotChecked=66, Total=1260 [2023-11-12 00:12:56,700 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 18 states, 16 states have (on average 1.0) internal successors, (16), 14 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:12:58,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:12:58,018 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2023-11-12 00:12:58,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-12 00:12:58,019 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.0) internal successors, (16), 14 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2023-11-12 00:12:58,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:12:58,020 INFO L225 Difference]: With dead ends: 39 [2023-11-12 00:12:58,020 INFO L226 Difference]: Without dead ends: 36 [2023-11-12 00:12:58,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=252, Invalid=1552, Unknown=6, NotChecked=82, Total=1892 [2023-11-12 00:12:58,023 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 40 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:12:58,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 53 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:12:58,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-12 00:12:58,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2023-11-12 00:12:58,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 00:12:58,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2023-11-12 00:12:58,043 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2023-11-12 00:12:58,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:12:58,044 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2023-11-12 00:12:58,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.0) internal successors, (16), 14 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:12:58,044 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2023-11-12 00:12:58,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-12 00:12:58,045 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:12:58,045 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:12:58,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 00:12:58,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 00:12:58,253 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:12:58,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:12:58,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1815245974, now seen corresponding path program 5 times [2023-11-12 00:12:58,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:12:58,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787191320] [2023-11-12 00:12:58,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:58,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:12:58,284 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:12:58,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [286728217] [2023-11-12 00:12:58,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:12:58,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:12:58,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:12:58,286 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:12:58,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 00:12:58,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 00:12:58,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:12:58,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 00:12:58,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:12:58,625 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:12:58,625 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:12:58,755 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:12:58,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:12:58,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787191320] [2023-11-12 00:12:58,755 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:12:58,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286728217] [2023-11-12 00:12:58,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286728217] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:12:58,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1183982354] [2023-11-12 00:12:58,759 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 00:12:58,759 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:12:58,759 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:12:58,760 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:12:58,760 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:12:59,194 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-12 00:12:59,196 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:13:00,642 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1314#(and (<= |ULTIMATE.start_main_~index~0#1| 32766) (= |ULTIMATE.start_main_~temp~0#1| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~index~0#1|) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (<= 2 |ULTIMATE.start_main_~#array1~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 2 |ULTIMATE.start_main_~#array2~0#1.base|) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 32767) (<= 1 ~ARR_SIZE~0))' at error location [2023-11-12 00:13:00,642 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:13:00,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:13:00,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-11-12 00:13:00,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467009232] [2023-11-12 00:13:00,643 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:13:00,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 00:13:00,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:13:00,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 00:13:00,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=462, Unknown=1, NotChecked=0, Total=552 [2023-11-12 00:13:00,646 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 00:13:00,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:13:00,938 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2023-11-12 00:13:00,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 00:13:00,939 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2023-11-12 00:13:00,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:13:00,940 INFO L225 Difference]: With dead ends: 53 [2023-11-12 00:13:00,940 INFO L226 Difference]: Without dead ends: 45 [2023-11-12 00:13:00,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=124, Invalid=631, Unknown=1, NotChecked=0, Total=756 [2023-11-12 00:13:00,942 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 41 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:13:00,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 47 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:13:00,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-12 00:13:00,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2023-11-12 00:13:00,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-12 00:13:00,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2023-11-12 00:13:00,960 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 21 [2023-11-12 00:13:00,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:13:00,961 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2023-11-12 00:13:00,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 00:13:00,961 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2023-11-12 00:13:00,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-12 00:13:00,962 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:13:00,963 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:13:00,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 00:13:01,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:01,170 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:13:01,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:13:01,171 INFO L85 PathProgramCache]: Analyzing trace with hash 323778874, now seen corresponding path program 6 times [2023-11-12 00:13:01,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:13:01,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453603750] [2023-11-12 00:13:01,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:01,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:13:01,216 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:13:01,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [709198414] [2023-11-12 00:13:01,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 00:13:01,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:01,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:13:01,218 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:13:01,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 00:13:01,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 00:13:01,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:13:01,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 00:13:01,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:13:01,512 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:13:01,512 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:13:01,643 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:13:01,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:13:01,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453603750] [2023-11-12 00:13:01,644 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:13:01,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709198414] [2023-11-12 00:13:01,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709198414] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:13:01,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [910216124] [2023-11-12 00:13:01,647 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 00:13:01,647 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:13:01,648 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:13:01,648 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:13:01,648 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:13:02,021 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-12 00:13:02,027 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:13:03,410 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1604#(and (<= |ULTIMATE.start_main_~index~0#1| 32766) (= |ULTIMATE.start_main_~temp~0#1| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~index~0#1|) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (<= 2 |ULTIMATE.start_main_~#array1~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 2 |ULTIMATE.start_main_~#array2~0#1.base|) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 32767) (<= 1 ~ARR_SIZE~0))' at error location [2023-11-12 00:13:03,410 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:13:03,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:13:03,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-11-12 00:13:03,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300032757] [2023-11-12 00:13:03,411 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:13:03,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 00:13:03,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:13:03,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 00:13:03,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2023-11-12 00:13:03,414 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 00:13:03,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:13:03,855 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2023-11-12 00:13:03,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 00:13:03,856 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2023-11-12 00:13:03,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:13:03,857 INFO L225 Difference]: With dead ends: 45 [2023-11-12 00:13:03,857 INFO L226 Difference]: Without dead ends: 42 [2023-11-12 00:13:03,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2023-11-12 00:13:03,859 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 18 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:13:03,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 64 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:13:03,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-12 00:13:03,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2023-11-12 00:13:03,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-12 00:13:03,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2023-11-12 00:13:03,880 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 21 [2023-11-12 00:13:03,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:13:03,880 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2023-11-12 00:13:03,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 00:13:03,880 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2023-11-12 00:13:03,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-12 00:13:03,881 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:13:03,882 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:13:03,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 00:13:04,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:04,092 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:13:04,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:13:04,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1446975050, now seen corresponding path program 7 times [2023-11-12 00:13:04,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:13:04,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279747022] [2023-11-12 00:13:04,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:04,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:13:04,114 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:13:04,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [596007980] [2023-11-12 00:13:04,121 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 00:13:04,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:04,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:13:04,122 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:13:04,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84236205-03cc-476e-a92a-a3315b88d4f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 00:13:04,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:13:04,303 WARN L260 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 71 conjunts are in the unsatisfiable core [2023-11-12 00:13:04,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:13:04,375 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-12 00:13:04,488 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-12 00:13:04,596 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2023-11-12 00:13:04,745 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2023-11-12 00:13:05,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:13:06,462 INFO L322 Elim1Store]: treesize reduction 525, result has 14.8 percent of original size [2023-11-12 00:13:06,462 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 15 select indices, 15 select index equivalence classes, 9 disjoint index pairs (out of 105 index pairs), introduced 16 new quantified variables, introduced 69 case distinctions, treesize of input 240 treesize of output 266 [2023-11-12 00:13:06,762 INFO L322 Elim1Store]: treesize reduction 40, result has 46.7 percent of original size [2023-11-12 00:13:06,763 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 219 treesize of output 216 [2023-11-12 00:13:06,928 INFO L322 Elim1Store]: treesize reduction 141, result has 0.7 percent of original size [2023-11-12 00:13:06,928 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 101 treesize of output 165 [2023-11-12 00:13:07,184 INFO L322 Elim1Store]: treesize reduction 139, result has 24.5 percent of original size [2023-11-12 00:13:07,185 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 129 treesize of output 90 [2023-11-12 00:13:07,609 INFO L322 Elim1Store]: treesize reduction 109, result has 29.2 percent of original size [2023-11-12 00:13:07,610 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 71 [2023-11-12 00:13:08,171 INFO L322 Elim1Store]: treesize reduction 103, result has 27.5 percent of original size [2023-11-12 00:13:08,172 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 204 treesize of output 193 [2023-11-12 00:13:10,216 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:13:10,216 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 116 [2023-11-12 00:13:10,549 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:13:10,550 INFO L327 TraceCheckSpWp]: Computing backward predicates...