./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/freire1_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire1_valuebound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bff053df41c1fc922299a13f2dac2a98df2d05e146d51bf11ac9e37ddfefad6a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:01:33,378 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:01:33,498 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-11-25 00:01:33,507 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:01:33,508 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:01:33,556 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:01:33,557 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:01:33,558 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:01:33,559 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:01:33,560 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:01:33,561 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:01:33,562 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:01:33,563 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:01:33,568 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:01:33,568 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:01:33,569 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:01:33,569 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:01:33,569 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:01:33,570 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:01:33,570 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:01:33,572 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:01:33,573 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:01:33,574 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:01:33,575 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:01:33,575 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-25 00:01:33,575 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:01:33,576 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-25 00:01:33,576 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:01:33,577 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:01:33,577 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:01:33,578 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:01:33,579 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-25 00:01:33,579 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-25 00:01:33,579 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-25 00:01:33,579 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:01:33,579 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:01:33,580 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:01:33,581 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:01:33,581 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:01:33,581 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:01:33,582 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:01:33,584 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:01:33,585 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:01:33,585 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:01:33,585 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:01:33,586 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:01:33,586 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:01:33,586 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:01:33,586 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:01:33,587 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_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bff053df41c1fc922299a13f2dac2a98df2d05e146d51bf11ac9e37ddfefad6a [2023-11-25 00:01:33,906 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:01:33,939 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:01:33,942 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:01:33,943 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:01:33,944 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:01:33,945 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/nla-digbench-scaling/freire1_valuebound20.c [2023-11-25 00:01:37,143 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:01:37,341 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:01:37,342 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/sv-benchmarks/c/nla-digbench-scaling/freire1_valuebound20.c [2023-11-25 00:01:37,350 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/data/a9d7259e9/cd8d712fb53b4e0cbea5d6f707b3ae4f/FLAG3bb2728fb [2023-11-25 00:01:37,372 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/data/a9d7259e9/cd8d712fb53b4e0cbea5d6f707b3ae4f [2023-11-25 00:01:37,378 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:01:37,380 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:01:37,383 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:01:37,383 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:01:37,389 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:01:37,389 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:01:37" (1/1) ... [2023-11-25 00:01:37,390 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26f3d592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:01:37, skipping insertion in model container [2023-11-25 00:01:37,391 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:01:37" (1/1) ... [2023-11-25 00:01:37,414 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:01:37,624 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:01:37,635 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:01:37,653 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:01:37,668 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:01:37,668 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:01:37 WrapperNode [2023-11-25 00:01:37,669 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:01:37,670 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:01:37,670 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:01:37,670 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:01:37,678 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:01:37" (1/1) ... [2023-11-25 00:01:37,684 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:01:37" (1/1) ... [2023-11-25 00:01:37,704 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 45 [2023-11-25 00:01:37,704 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:01:37,705 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:01:37,705 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:01:37,705 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:01:37,715 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:01:37" (1/1) ... [2023-11-25 00:01:37,715 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:01:37" (1/1) ... [2023-11-25 00:01:37,716 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:01:37" (1/1) ... [2023-11-25 00:01:37,717 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:01:37" (1/1) ... [2023-11-25 00:01:37,731 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:01:37" (1/1) ... [2023-11-25 00:01:37,734 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:01:37" (1/1) ... [2023-11-25 00:01:37,735 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:01:37" (1/1) ... [2023-11-25 00:01:37,736 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:01:37" (1/1) ... [2023-11-25 00:01:37,738 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:01:37,739 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:01:37,739 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:01:37,739 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:01:37,740 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:01:37" (1/1) ... [2023-11-25 00:01:37,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:01:37,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:01:37,782 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:01:37,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:01:37,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:01:37,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:01:37,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:01:37,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:01:37,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-25 00:01:37,819 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-25 00:01:37,894 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:01:37,896 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:01:38,038 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:01:38,088 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:01:38,088 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-25 00:01:38,090 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:01:38 BoogieIcfgContainer [2023-11-25 00:01:38,090 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:01:38,093 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:01:38,093 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:01:38,097 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:01:38,098 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:01:37" (1/3) ... [2023-11-25 00:01:38,098 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@635ad147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:01:38, skipping insertion in model container [2023-11-25 00:01:38,099 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:01:37" (2/3) ... [2023-11-25 00:01:38,099 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@635ad147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:01:38, skipping insertion in model container [2023-11-25 00:01:38,099 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:01:38" (3/3) ... [2023-11-25 00:01:38,101 INFO L112 eAbstractionObserver]: Analyzing ICFG freire1_valuebound20.c [2023-11-25 00:01:38,121 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:01:38,121 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-11-25 00:01:38,173 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:01:38,182 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;@1f53b26, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:01:38,184 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-25 00:01:38,189 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 17 states have internal predecessors, (19), 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) [2023-11-25 00:01:38,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-25 00:01:38,196 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:01:38,197 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-25 00:01:38,198 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-25 00:01:38,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:01:38,205 INFO L85 PathProgramCache]: Analyzing trace with hash 99560, now seen corresponding path program 1 times [2023-11-25 00:01:38,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:01:38,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275730271] [2023-11-25 00:01:38,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:38,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:01:38,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:38,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:01:38,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:01:38,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275730271] [2023-11-25 00:01:38,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275730271] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:01:38,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:01:38,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-25 00:01:38,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565139876] [2023-11-25 00:01:38,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:01:38,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-25 00:01:38,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:01:38,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-25 00:01:38,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-25 00:01:38,470 INFO L87 Difference]: Start difference. First operand has 21 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 17 states have internal predecessors, (19), 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, 1 states have (on average 3.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:01:38,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:01:38,523 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2023-11-25 00:01:38,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-25 00:01:38,526 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 3.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-25 00:01:38,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:01:38,534 INFO L225 Difference]: With dead ends: 29 [2023-11-25 00:01:38,534 INFO L226 Difference]: Without dead ends: 16 [2023-11-25 00:01:38,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-25 00:01:38,544 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:01:38,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-25 00:01:38,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-25 00:01:38,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-11-25 00:01:38,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 10 states have (on average 1.4) internal successors, (14), 13 states have internal predecessors, (14), 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) [2023-11-25 00:01:38,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2023-11-25 00:01:38,587 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 3 [2023-11-25 00:01:38,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:01:38,588 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2023-11-25 00:01:38,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 3.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:01:38,591 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2023-11-25 00:01:38,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-25 00:01:38,592 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:01:38,593 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-25 00:01:38,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-25 00:01:38,596 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-25 00:01:38,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:01:38,598 INFO L85 PathProgramCache]: Analyzing trace with hash 3086412, now seen corresponding path program 1 times [2023-11-25 00:01:38,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:01:38,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056529205] [2023-11-25 00:01:38,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:38,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:01:38,635 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:01:38,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1062177969] [2023-11-25 00:01:38,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:38,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:01:38,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:01:38,647 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:01:38,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-25 00:01:38,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:38,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-25 00:01:38,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:01:38,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:01:38,749 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:01:38,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:01:38,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056529205] [2023-11-25 00:01:38,750 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:01:38,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062177969] [2023-11-25 00:01:38,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062177969] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:01:38,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:01:38,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-25 00:01:38,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176732643] [2023-11-25 00:01:38,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:01:38,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:01:38,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:01:38,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:01:38,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:01:38,754 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:01:38,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:01:38,821 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2023-11-25 00:01:38,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:01:38,822 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-25 00:01:38,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:01:38,823 INFO L225 Difference]: With dead ends: 29 [2023-11-25 00:01:38,823 INFO L226 Difference]: Without dead ends: 23 [2023-11-25 00:01:38,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:01:38,825 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 5 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:01:38,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 14 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:01:38,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-25 00:01:38,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-25 00:01:38,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.25) internal successors, (20), 19 states have internal predecessors, (20), 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) [2023-11-25 00:01:38,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2023-11-25 00:01:38,839 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 4 [2023-11-25 00:01:38,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:01:38,840 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2023-11-25 00:01:38,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:01:38,841 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2023-11-25 00:01:38,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-25 00:01:38,844 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:01:38,844 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:01:38,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-25 00:01:39,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:01:39,051 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-25 00:01:39,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:01:39,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1375170262, now seen corresponding path program 1 times [2023-11-25 00:01:39,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:01:39,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580270177] [2023-11-25 00:01:39,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:39,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:01:39,073 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:01:39,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1190546151] [2023-11-25 00:01:39,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:39,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:01:39,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:01:39,079 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:01:39,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-25 00:01:39,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:39,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-25 00:01:39,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:01:39,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:01:39,228 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:01:39,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:01:39,469 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:01:39,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580270177] [2023-11-25 00:01:39,469 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:01:39,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190546151] [2023-11-25 00:01:39,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190546151] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:01:39,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [545601460] [2023-11-25 00:01:39,500 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-25 00:01:39,500 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:01:39,504 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:01:39,510 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:01:39,511 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:01:40,528 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-11-25 00:01:40,532 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:01:40,807 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '232#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~r~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~r~0#1|)) (<= 0 |ULTIMATE.start_main_~r~0#1|))' at error location [2023-11-25 00:01:40,808 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:01:40,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-25 00:01:40,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-11-25 00:01:40,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338016565] [2023-11-25 00:01:40,809 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-25 00:01:40,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-25 00:01:40,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:01:40,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-25 00:01:40,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-25 00:01:40,812 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 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) [2023-11-25 00:01:40,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:01:40,916 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2023-11-25 00:01:40,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-25 00:01:40,917 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 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 13 [2023-11-25 00:01:40,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:01:40,918 INFO L225 Difference]: With dead ends: 45 [2023-11-25 00:01:40,918 INFO L226 Difference]: Without dead ends: 35 [2023-11-25 00:01:40,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-25 00:01:40,921 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 19 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:01:40,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 24 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:01:40,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-25 00:01:40,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-11-25 00:01:40,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-25 00:01:40,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2023-11-25 00:01:40,930 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 13 [2023-11-25 00:01:40,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:01:40,931 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2023-11-25 00:01:40,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 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) [2023-11-25 00:01:40,932 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2023-11-25 00:01:40,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-25 00:01:40,933 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:01:40,934 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1] [2023-11-25 00:01:40,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-25 00:01:41,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:01:41,140 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-25 00:01:41,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:01:41,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1100889804, now seen corresponding path program 2 times [2023-11-25 00:01:41,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:01:41,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294682869] [2023-11-25 00:01:41,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:41,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:01:41,156 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:01:41,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2053951783] [2023-11-25 00:01:41,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-25 00:01:41,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:01:41,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:01:41,159 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:01:41,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-25 00:01:41,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-25 00:01:41,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:01:41,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-25 00:01:41,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:01:41,585 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-25 00:01:41,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:01:41,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:01:41,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294682869] [2023-11-25 00:01:41,979 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:01:41,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053951783] [2023-11-25 00:01:41,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053951783] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:01:41,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1765504330] [2023-11-25 00:01:41,982 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-25 00:01:41,983 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:01:41,983 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:01:41,984 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:01:41,984 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:01:42,408 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-11-25 00:01:42,410 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:01:42,757 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '517#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~r~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~r~0#1|)) (<= 0 |ULTIMATE.start_main_~r~0#1|))' at error location [2023-11-25 00:01:42,757 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:01:42,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:01:42,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-11-25 00:01:42,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128482358] [2023-11-25 00:01:42,758 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-25 00:01:42,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-25 00:01:42,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:01:42,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-25 00:01:42,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-11-25 00:01:42,760 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-25 00:01:42,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:01:42,940 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2023-11-25 00:01:42,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-25 00:01:42,941 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 40 [2023-11-25 00:01:42,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:01:42,942 INFO L225 Difference]: With dead ends: 47 [2023-11-25 00:01:42,943 INFO L226 Difference]: Without dead ends: 46 [2023-11-25 00:01:42,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2023-11-25 00:01:42,944 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 23 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:01:42,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 19 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:01:42,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-25 00:01:42,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2023-11-25 00:01:42,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-25 00:01:42,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2023-11-25 00:01:42,958 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 40 [2023-11-25 00:01:42,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:01:42,959 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2023-11-25 00:01:42,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-25 00:01:42,959 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2023-11-25 00:01:42,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-25 00:01:42,961 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:01:42,961 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1] [2023-11-25 00:01:42,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-25 00:01:43,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:01:43,169 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-25 00:01:43,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:01:43,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1223399510, now seen corresponding path program 3 times [2023-11-25 00:01:43,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:01:43,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929772377] [2023-11-25 00:01:43,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:43,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:01:43,187 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:01:43,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [941190644] [2023-11-25 00:01:43,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-25 00:01:43,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:01:43,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:01:43,189 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:01:43,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-25 00:01:43,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-25 00:01:43,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:01:43,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-25 00:01:43,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:01:43,355 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-25 00:01:43,355 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:01:43,602 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-25 00:01:43,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:01:43,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929772377] [2023-11-25 00:01:43,603 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:01:43,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941190644] [2023-11-25 00:01:43,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941190644] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:01:43,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [992397235] [2023-11-25 00:01:43,605 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-25 00:01:43,606 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:01:43,606 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:01:43,606 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:01:43,606 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:01:43,997 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-11-25 00:01:43,999 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:01:44,445 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '947#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~r~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~r~0#1|)) (<= 0 |ULTIMATE.start_main_~r~0#1|))' at error location [2023-11-25 00:01:44,446 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:01:44,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-25 00:01:44,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-25 00:01:44,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352734110] [2023-11-25 00:01:44,446 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-25 00:01:44,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-25 00:01:44,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:01:44,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-25 00:01:44,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2023-11-25 00:01:44,449 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 14 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 14 states have internal predecessors, (69), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-25 00:01:44,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:01:44,813 INFO L93 Difference]: Finished difference Result 92 states and 109 transitions. [2023-11-25 00:01:44,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-25 00:01:44,814 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 14 states have internal predecessors, (69), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 49 [2023-11-25 00:01:44,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:01:44,815 INFO L225 Difference]: With dead ends: 92 [2023-11-25 00:01:44,816 INFO L226 Difference]: Without dead ends: 91 [2023-11-25 00:01:44,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 121 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2023-11-25 00:01:44,817 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 21 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:01:44,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 150 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:01:44,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-25 00:01:44,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2023-11-25 00:01:44,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 77 states have (on average 1.0129870129870129) internal successors, (78), 77 states have internal predecessors, (78), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-25 00:01:44,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 102 transitions. [2023-11-25 00:01:44,845 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 102 transitions. Word has length 49 [2023-11-25 00:01:44,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:01:44,846 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 102 transitions. [2023-11-25 00:01:44,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 14 states have internal predecessors, (69), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-25 00:01:44,846 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 102 transitions. [2023-11-25 00:01:44,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-25 00:01:44,853 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:01:44,853 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 1, 1] [2023-11-25 00:01:44,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-25 00:01:45,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:01:45,060 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-25 00:01:45,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:01:45,060 INFO L85 PathProgramCache]: Analyzing trace with hash 696830924, now seen corresponding path program 4 times [2023-11-25 00:01:45,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:01:45,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038101636] [2023-11-25 00:01:45,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:45,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:01:45,086 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:01:45,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2059448395] [2023-11-25 00:01:45,086 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-25 00:01:45,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:01:45,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:01:45,091 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:01:45,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-25 00:01:45,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:45,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-25 00:01:45,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:01:45,502 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 498 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2023-11-25 00:01:45,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:01:46,184 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 498 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2023-11-25 00:01:46,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:01:46,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038101636] [2023-11-25 00:01:46,185 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:01:46,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059448395] [2023-11-25 00:01:46,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059448395] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:01:46,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [845202443] [2023-11-25 00:01:46,187 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-25 00:01:46,188 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:01:46,188 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:01:46,188 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:01:46,188 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:01:46,511 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-11-25 00:01:46,513 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:01:47,608 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1892#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~r~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~r~0#1|)) (<= 0 |ULTIMATE.start_main_~r~0#1|))' at error location [2023-11-25 00:01:47,609 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:01:47,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-25 00:01:47,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2023-11-25 00:01:47,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159566340] [2023-11-25 00:01:47,609 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-25 00:01:47,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-25 00:01:47,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:01:47,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-25 00:01:47,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=881, Unknown=0, NotChecked=0, Total=1122 [2023-11-25 00:01:47,613 INFO L87 Difference]: Start difference. First operand 91 states and 102 transitions. Second operand has 28 states, 27 states have (on average 5.666666666666667) internal successors, (153), 28 states have internal predecessors, (153), 24 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-25 00:01:49,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:01:49,046 INFO L93 Difference]: Finished difference Result 190 states and 228 transitions. [2023-11-25 00:01:49,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-25 00:01:49,047 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 5.666666666666667) internal successors, (153), 28 states have internal predecessors, (153), 24 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 112 [2023-11-25 00:01:49,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:01:49,050 INFO L225 Difference]: With dead ends: 190 [2023-11-25 00:01:49,050 INFO L226 Difference]: Without dead ends: 189 [2023-11-25 00:01:49,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 289 SyntacticMatches, 13 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=577, Invalid=1493, Unknown=0, NotChecked=0, Total=2070 [2023-11-25 00:01:49,057 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 45 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-25 00:01:49,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 572 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 937 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-25 00:01:49,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-11-25 00:01:49,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2023-11-25 00:01:49,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 161 states have (on average 1.0062111801242235) internal successors, (162), 161 states have internal predecessors, (162), 26 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-25 00:01:49,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 214 transitions. [2023-11-25 00:01:49,087 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 214 transitions. Word has length 112 [2023-11-25 00:01:49,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:01:49,088 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 214 transitions. [2023-11-25 00:01:49,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 5.666666666666667) internal successors, (153), 28 states have internal predecessors, (153), 24 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-25 00:01:49,089 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 214 transitions. [2023-11-25 00:01:49,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2023-11-25 00:01:49,094 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:01:49,094 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 26, 26, 26, 1, 1] [2023-11-25 00:01:49,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-25 00:01:49,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:01:49,301 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-25 00:01:49,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:01:49,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1877162636, now seen corresponding path program 5 times [2023-11-25 00:01:49,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:01:49,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187129951] [2023-11-25 00:01:49,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:49,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:01:49,326 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:01:49,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1618383697] [2023-11-25 00:01:49,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-25 00:01:49,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:01:49,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:01:49,328 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:01:49,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-25 00:01:49,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2023-11-25 00:01:49,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:01:49,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-25 00:01:49,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:01:50,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 2353 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2023-11-25 00:01:50,630 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:01:50,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:01:50,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187129951] [2023-11-25 00:01:50,933 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:01:50,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618383697] [2023-11-25 00:01:50,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618383697] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:01:50,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [338597043] [2023-11-25 00:01:50,936 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-25 00:01:50,936 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:01:50,937 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:01:50,937 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:01:50,937 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:01:51,300 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-11-25 00:01:51,303 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:01:52,804 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3202#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~r~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~r~0#1|)) (<= 0 |ULTIMATE.start_main_~r~0#1|))' at error location [2023-11-25 00:01:52,804 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:01:52,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:01:52,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2023-11-25 00:01:52,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518141073] [2023-11-25 00:01:52,805 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-25 00:01:52,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-25 00:01:52,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:01:52,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-25 00:01:52,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=473, Invalid=1087, Unknown=0, NotChecked=0, Total=1560 [2023-11-25 00:01:52,808 INFO L87 Difference]: Start difference. First operand 189 states and 214 transitions. Second operand has 30 states, 29 states have (on average 5.551724137931035) internal successors, (161), 30 states have internal predecessors, (161), 26 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-25 00:01:53,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:01:53,985 INFO L93 Difference]: Finished difference Result 201 states and 228 transitions. [2023-11-25 00:01:53,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-25 00:01:53,986 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 5.551724137931035) internal successors, (161), 30 states have internal predecessors, (161), 26 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 238 [2023-11-25 00:01:53,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:01:53,989 INFO L225 Difference]: With dead ends: 201 [2023-11-25 00:01:53,989 INFO L226 Difference]: Without dead ends: 200 [2023-11-25 00:01:53,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 426 SyntacticMatches, 27 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1570 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1357, Invalid=2933, Unknown=0, NotChecked=0, Total=4290 [2023-11-25 00:01:53,993 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 133 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-25 00:01:53,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 68 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-25 00:01:53,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-11-25 00:01:54,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 196. [2023-11-25 00:01:54,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 167 states have (on average 1.0059880239520957) internal successors, (168), 167 states have internal predecessors, (168), 27 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2023-11-25 00:01:54,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 222 transitions. [2023-11-25 00:01:54,042 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 222 transitions. Word has length 238 [2023-11-25 00:01:54,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:01:54,044 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 222 transitions. [2023-11-25 00:01:54,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 5.551724137931035) internal successors, (161), 30 states have internal predecessors, (161), 26 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-25 00:01:54,044 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 222 transitions. [2023-11-25 00:01:54,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2023-11-25 00:01:54,054 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:01:54,055 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 27, 27, 27, 1, 1] [2023-11-25 00:01:54,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-25 00:01:54,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:01:54,262 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-25 00:01:54,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:01:54,263 INFO L85 PathProgramCache]: Analyzing trace with hash 539350166, now seen corresponding path program 6 times [2023-11-25 00:01:54,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:01:54,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262730360] [2023-11-25 00:01:54,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:54,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:01:54,307 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:01:54,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [906330257] [2023-11-25 00:01:54,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-25 00:01:54,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:01:54,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:01:54,311 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:01:54,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-25 00:01:54,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-25 00:01:54,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:01:54,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 57 conjunts are in the unsatisfiable core [2023-11-25 00:01:54,483 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:01:55,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 2538 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2023-11-25 00:01:55,213 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:01:57,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 2538 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2023-11-25 00:01:57,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:01:57,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262730360] [2023-11-25 00:01:57,399 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:01:57,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906330257] [2023-11-25 00:01:57,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906330257] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:01:57,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1349098201] [2023-11-25 00:01:57,402 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-25 00:01:57,402 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:01:57,403 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:01:57,403 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:01:57,403 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:01:57,698 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-11-25 00:01:57,699 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:02:01,079 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5304#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~r~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~r~0#1|)) (<= 0 |ULTIMATE.start_main_~r~0#1|))' at error location [2023-11-25 00:02:01,079 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:02:01,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-25 00:02:01,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 57 [2023-11-25 00:02:01,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810424777] [2023-11-25 00:02:01,080 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-25 00:02:01,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-11-25 00:02:01,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:01,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-11-25 00:02:01,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=916, Invalid=3116, Unknown=0, NotChecked=0, Total=4032 [2023-11-25 00:02:01,087 INFO L87 Difference]: Start difference. First operand 196 states and 222 transitions. Second operand has 58 states, 57 states have (on average 5.842105263157895) internal successors, (333), 58 states have internal predecessors, (333), 54 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2023-11-25 00:02:07,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:07,574 INFO L93 Difference]: Finished difference Result 400 states and 483 transitions. [2023-11-25 00:02:07,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-11-25 00:02:07,574 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 5.842105263157895) internal successors, (333), 58 states have internal predecessors, (333), 54 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) Word has length 247 [2023-11-25 00:02:07,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:07,578 INFO L225 Difference]: With dead ends: 400 [2023-11-25 00:02:07,578 INFO L226 Difference]: Without dead ends: 399 [2023-11-25 00:02:07,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 766 GetRequests, 649 SyntacticMatches, 28 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1389 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=2482, Invalid=5708, Unknown=0, NotChecked=0, Total=8190 [2023-11-25 00:02:07,582 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 90 mSDsluCounter, 2351 mSDsCounter, 0 mSdLazyCounter, 4115 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 2464 SdHoareTripleChecker+Invalid, 4145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 4115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:07,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 2464 Invalid, 4145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 4115 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-25 00:02:07,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2023-11-25 00:02:07,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 399. [2023-11-25 00:02:07,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 341 states have (on average 1.002932551319648) internal successors, (342), 341 states have internal predecessors, (342), 56 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2023-11-25 00:02:07,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 454 transitions. [2023-11-25 00:02:07,649 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 454 transitions. Word has length 247 [2023-11-25 00:02:07,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:07,650 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 454 transitions. [2023-11-25 00:02:07,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 5.842105263157895) internal successors, (333), 58 states have internal predecessors, (333), 54 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2023-11-25 00:02:07,651 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 454 transitions. [2023-11-25 00:02:07,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2023-11-25 00:02:07,665 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:07,666 INFO L195 NwaCegarLoop]: trace histogram [57, 57, 56, 56, 56, 56, 56, 56, 56, 1, 1] [2023-11-25 00:02:07,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-25 00:02:07,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:07,873 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-25 00:02:07,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:07,873 INFO L85 PathProgramCache]: Analyzing trace with hash -264146100, now seen corresponding path program 7 times [2023-11-25 00:02:07,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:07,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503875759] [2023-11-25 00:02:07,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:07,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:07,927 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:02:07,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1069316618] [2023-11-25 00:02:07,929 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-25 00:02:07,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:07,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:02:07,931 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:02:07,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee4438d-6e3c-4795-b0a5-ea47397e35dc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-25 00:02:08,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:08,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 923 conjuncts, 115 conjunts are in the unsatisfiable core [2023-11-25 00:02:08,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:02:10,168 INFO L134 CoverageAnalysis]: Checked inductivity of 14028 backedges. 0 proven. 10948 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2023-11-25 00:02:10,168 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:02:16,991 INFO L134 CoverageAnalysis]: Checked inductivity of 14028 backedges. 0 proven. 10948 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2023-11-25 00:02:16,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:16,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503875759] [2023-11-25 00:02:16,992 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:02:16,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069316618] [2023-11-25 00:02:16,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069316618] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:02:16,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1218526985] [2023-11-25 00:02:16,994 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-25 00:02:16,995 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:02:16,995 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:02:16,995 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:02:16,995 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:02:17,273 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-11-25 00:02:17,275 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:02:29,269 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9549#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~r~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~r~0#1|)) (<= 0 |ULTIMATE.start_main_~r~0#1|))' at error location [2023-11-25 00:02:29,269 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:02:29,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-25 00:02:29,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 115 [2023-11-25 00:02:29,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998136445] [2023-11-25 00:02:29,270 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-25 00:02:29,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2023-11-25 00:02:29,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:29,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2023-11-25 00:02:29,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3497, Invalid=11265, Unknown=0, NotChecked=0, Total=14762 [2023-11-25 00:02:29,283 INFO L87 Difference]: Start difference. First operand 399 states and 454 transitions. Second operand has 116 states, 115 states have (on average 5.921739130434783) internal successors, (681), 116 states have internal predecessors, (681), 112 states have call successors, (112), 1 states have call predecessors, (112), 1 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112)