./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/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_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a8eb1c4cff73de825c0246f8cf2782e4a89e8227445b840b0a85ffef021d29c3 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:06:12,074 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:06:12,200 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-25 00:06:12,210 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:06:12,211 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:06:12,257 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:06:12,258 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:06:12,258 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:06:12,260 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:06:12,265 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:06:12,265 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:06:12,266 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:06:12,266 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:06:12,268 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:06:12,269 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:06:12,269 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:06:12,270 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:06:12,270 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:06:12,271 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:06:12,272 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:06:12,274 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:06:12,275 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:06:12,276 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:06:12,276 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:06:12,277 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-25 00:06:12,277 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:06:12,278 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-25 00:06:12,278 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:06:12,278 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:06:12,279 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:06:12,280 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:06:12,296 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-25 00:06:12,297 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:06:12,297 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:06:12,297 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:06:12,297 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:06:12,298 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:06:12,298 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:06:12,298 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:06:12,299 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:06:12,299 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:06:12,299 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:06:12,300 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:06:12,300 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:06:12,300 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:06:12,300 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:06:12,301 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:06:12,301 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_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8eb1c4cff73de825c0246f8cf2782e4a89e8227445b840b0a85ffef021d29c3 [2023-11-25 00:06:12,669 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:06:12,700 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:06:12,703 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:06:12,705 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:06:12,705 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:06:12,707 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound5.c [2023-11-25 00:06:15,984 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:06:16,268 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:06:16,269 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound5.c [2023-11-25 00:06:16,279 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/data/d7c0eacdd/c5a88ef7ce674380aa9b749bae6b96a1/FLAGe5184177b [2023-11-25 00:06:16,321 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/data/d7c0eacdd/c5a88ef7ce674380aa9b749bae6b96a1 [2023-11-25 00:06:16,324 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:06:16,326 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:06:16,328 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:06:16,329 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:06:16,335 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:06:16,336 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:06:16" (1/1) ... [2023-11-25 00:06:16,337 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a39aada and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:16, skipping insertion in model container [2023-11-25 00:06:16,337 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:06:16" (1/1) ... [2023-11-25 00:06:16,363 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:06:16,569 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound5.c[524,537] [2023-11-25 00:06:16,601 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:06:16,614 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:06:16,627 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound5.c[524,537] [2023-11-25 00:06:16,641 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:06:16,658 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:06:16,659 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:16 WrapperNode [2023-11-25 00:06:16,659 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:06:16,660 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:06:16,661 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:06:16,661 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:06:16,672 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:16" (1/1) ... [2023-11-25 00:06:16,680 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:16" (1/1) ... [2023-11-25 00:06:16,720 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2023-11-25 00:06:16,721 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:06:16,721 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:06:16,722 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:06:16,722 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:06:16,731 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:16" (1/1) ... [2023-11-25 00:06:16,731 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:16" (1/1) ... [2023-11-25 00:06:16,733 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:16" (1/1) ... [2023-11-25 00:06:16,733 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:16" (1/1) ... [2023-11-25 00:06:16,737 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:16" (1/1) ... [2023-11-25 00:06:16,741 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:16" (1/1) ... [2023-11-25 00:06:16,743 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:16" (1/1) ... [2023-11-25 00:06:16,744 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:16" (1/1) ... [2023-11-25 00:06:16,746 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:06:16,747 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:06:16,748 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:06:16,748 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:06:16,749 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:16" (1/1) ... [2023-11-25 00:06:16,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:06:16,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:06:16,807 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:06:16,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:06:16,854 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:06:16,854 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-25 00:06:16,854 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-25 00:06:16,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:06:16,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:06:16,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:06:16,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-25 00:06:16,855 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-25 00:06:16,934 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:06:16,937 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:06:17,157 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:06:17,210 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:06:17,210 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-25 00:06:17,212 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:06:17 BoogieIcfgContainer [2023-11-25 00:06:17,212 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:06:17,215 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:06:17,216 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:06:17,219 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:06:17,220 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:06:16" (1/3) ... [2023-11-25 00:06:17,221 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fca2bff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:06:17, skipping insertion in model container [2023-11-25 00:06:17,221 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:16" (2/3) ... [2023-11-25 00:06:17,221 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fca2bff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:06:17, skipping insertion in model container [2023-11-25 00:06:17,222 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:06:17" (3/3) ... [2023-11-25 00:06:17,223 INFO L112 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound5.c [2023-11-25 00:06:17,245 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:06:17,245 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-25 00:06:17,295 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:06:17,304 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;@6df554da, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:06:17,304 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-25 00:06:17,313 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-25 00:06:17,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-25 00:06:17,323 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:17,324 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:06:17,324 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:06:17,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:17,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1046920148, now seen corresponding path program 1 times [2023-11-25 00:06:17,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:17,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082421067] [2023-11-25 00:06:17,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:17,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:06:17,513 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:06:17,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1691928227] [2023-11-25 00:06:17,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:17,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:17,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:06:17,520 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:06:17,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-25 00:06:17,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:17,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-25 00:06:17,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:06:17,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:06:17,697 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:06:17,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:17,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082421067] [2023-11-25 00:06:17,698 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:06:17,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691928227] [2023-11-25 00:06:17,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691928227] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:06:17,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:06:17,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-25 00:06:17,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002449583] [2023-11-25 00:06:17,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:06:17,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-25 00:06:17,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:06:17,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-25 00:06:17,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-25 00:06:17,744 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-25 00:06:17,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:06:17,776 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2023-11-25 00:06:17,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-25 00:06:17,780 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2023-11-25 00:06:17,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:06:17,789 INFO L225 Difference]: With dead ends: 32 [2023-11-25 00:06:17,789 INFO L226 Difference]: Without dead ends: 17 [2023-11-25 00:06:17,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 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 00:06:17,798 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:06:17,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-25 00:06:17,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-25 00:06:17,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-25 00:06:17,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-25 00:06:17,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2023-11-25 00:06:17,845 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 13 [2023-11-25 00:06:17,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:06:17,848 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2023-11-25 00:06:17,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-25 00:06:17,850 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2023-11-25 00:06:17,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-25 00:06:17,854 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:17,854 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:06:17,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-25 00:06:18,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:18,059 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:06:18,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:18,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1317434454, now seen corresponding path program 1 times [2023-11-25 00:06:18,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:18,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787432509] [2023-11-25 00:06:18,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:18,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:06:18,082 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:06:18,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [290329979] [2023-11-25 00:06:18,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:18,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:18,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:06:18,097 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:06:18,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-25 00:06:18,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:18,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-25 00:06:18,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:06:18,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:06:18,324 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:06:18,325 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:18,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787432509] [2023-11-25 00:06:18,326 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:06:18,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290329979] [2023-11-25 00:06:18,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290329979] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:06:18,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:06:18,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:06:18,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589334623] [2023-11-25 00:06:18,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:06:18,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:06:18,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:06:18,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:06:18,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:06:18,334 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-25 00:06:18,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:06:18,382 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2023-11-25 00:06:18,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:06:18,383 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2023-11-25 00:06:18,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:06:18,385 INFO L225 Difference]: With dead ends: 26 [2023-11-25 00:06:18,385 INFO L226 Difference]: Without dead ends: 19 [2023-11-25 00:06:18,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:06:18,389 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:06:18,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-25 00:06:18,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-25 00:06:18,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-25 00:06:18,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-25 00:06:18,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2023-11-25 00:06:18,412 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 14 [2023-11-25 00:06:18,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:06:18,413 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2023-11-25 00:06:18,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-25 00:06:18,414 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2023-11-25 00:06:18,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-25 00:06:18,415 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:18,417 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:06:18,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-25 00:06:18,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:18,621 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:06:18,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:18,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1319221914, now seen corresponding path program 1 times [2023-11-25 00:06:18,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:18,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663314745] [2023-11-25 00:06:18,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:18,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:06:18,639 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:06:18,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2047412337] [2023-11-25 00:06:18,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:18,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:18,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:06:18,643 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:06:18,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-25 00:06:18,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:18,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-25 00:06:18,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:06:19,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-25 00:06:19,086 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:06:19,086 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:19,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663314745] [2023-11-25 00:06:19,086 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:06:19,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047412337] [2023-11-25 00:06:19,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047412337] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:06:19,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:06:19,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-25 00:06:19,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475598053] [2023-11-25 00:06:19,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:06:19,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-25 00:06:19,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:06:19,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-25 00:06:19,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:06:19,091 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-25 00:06:19,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:06:19,461 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2023-11-25 00:06:19,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-25 00:06:19,463 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2023-11-25 00:06:19,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:06:19,464 INFO L225 Difference]: With dead ends: 28 [2023-11-25 00:06:19,464 INFO L226 Difference]: Without dead ends: 26 [2023-11-25 00:06:19,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-25 00:06:19,466 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 13 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-25 00:06:19,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 46 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-25 00:06:19,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-25 00:06:19,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2023-11-25 00:06:19,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-25 00:06:19,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-11-25 00:06:19,491 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2023-11-25 00:06:19,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:06:19,494 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-11-25 00:06:19,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-25 00:06:19,495 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-11-25 00:06:19,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-25 00:06:19,497 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:19,497 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:06:19,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-25 00:06:19,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:19,704 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:06:19,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:19,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1562521278, now seen corresponding path program 1 times [2023-11-25 00:06:19,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:19,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61248577] [2023-11-25 00:06:19,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:19,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:06:19,726 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:06:19,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1048126062] [2023-11-25 00:06:19,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:19,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:19,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:06:19,730 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:06:19,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-25 00:06:19,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:19,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-25 00:06:19,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:06:19,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:06:19,971 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:06:20,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:06:20,149 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:20,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61248577] [2023-11-25 00:06:20,150 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:06:20,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048126062] [2023-11-25 00:06:20,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048126062] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:06:20,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2076544463] [2023-11-25 00:06:20,175 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-11-25 00:06:20,175 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:06:20,179 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:06:20,184 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:06:20,185 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:06:21,420 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 67 for LOIs [2023-11-25 00:06:21,616 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 92 for LOIs [2023-11-25 00:06:21,729 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:06:26,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2076544463] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:06:26,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-25 00:06:26,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [8, 7] total 22 [2023-11-25 00:06:26,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185847117] [2023-11-25 00:06:26,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:06:26,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-25 00:06:26,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:06:26,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-25 00:06:26,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2023-11-25 00:06:26,067 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 13 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-25 00:06:26,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:06:26,902 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2023-11-25 00:06:26,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-25 00:06:26,902 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 20 [2023-11-25 00:06:26,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:06:26,904 INFO L225 Difference]: With dead ends: 32 [2023-11-25 00:06:26,904 INFO L226 Difference]: Without dead ends: 25 [2023-11-25 00:06:26,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2023-11-25 00:06:26,905 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-25 00:06:26,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-25 00:06:26,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-25 00:06:26,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-25 00:06:26,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-25 00:06:26,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2023-11-25 00:06:26,925 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 20 [2023-11-25 00:06:26,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:06:26,926 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2023-11-25 00:06:26,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-25 00:06:26,926 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2023-11-25 00:06:26,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-25 00:06:26,928 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:26,929 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:06:26,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-25 00:06:27,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:27,140 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:06:27,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:27,141 INFO L85 PathProgramCache]: Analyzing trace with hash -182192907, now seen corresponding path program 1 times [2023-11-25 00:06:27,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:27,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612044644] [2023-11-25 00:06:27,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:27,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:06:27,161 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:06:27,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [809686420] [2023-11-25 00:06:27,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:27,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:27,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:06:27,170 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:06:27,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-25 00:06:27,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:27,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-25 00:06:27,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:06:27,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:06:27,289 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:06:27,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:06:27,345 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:27,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612044644] [2023-11-25 00:06:27,345 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:06:27,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809686420] [2023-11-25 00:06:27,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809686420] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:06:27,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [722358822] [2023-11-25 00:06:27,350 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-11-25 00:06:27,350 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:06:27,350 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:06:27,351 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:06:27,351 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:06:28,522 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 54 for LOIs [2023-11-25 00:06:28,609 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 96 for LOIs [2023-11-25 00:06:28,705 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:06:34,541 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '703#(and (or (exists ((|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_16| Int) (|v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_16| Int) (|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_26| Int)) (and (<= 0 |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_26|) (not (= (+ (* |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_16| |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_16|) (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_16| 2)) (+ (* |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_26| 4) (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_16| |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_16|) (* 2 |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_16|)))) (<= |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_26| 2147483647))) (exists ((|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_17| Int) (|v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_17| Int) (|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_27| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_15| Int)) (and (<= |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_27| 2147483647) (<= 0 |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_27|) (not (= (+ (* |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_15| 4) (* 2 |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_17|) (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_17| |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_17|) (* |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_27| 4)) (+ (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_17| 2) (* |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_17| |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_17|))))))) (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-25 00:06:34,541 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:06:34,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-25 00:06:34,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-11-25 00:06:34,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827924051] [2023-11-25 00:06:34,542 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-25 00:06:34,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-25 00:06:34,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:06:34,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-25 00:06:34,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=341, Unknown=1, NotChecked=0, Total=420 [2023-11-25 00:06:34,545 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-25 00:06:34,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:06:34,680 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2023-11-25 00:06:34,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-25 00:06:34,681 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 22 [2023-11-25 00:06:34,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:06:34,683 INFO L225 Difference]: With dead ends: 56 [2023-11-25 00:06:34,683 INFO L226 Difference]: Without dead ends: 49 [2023-11-25 00:06:34,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=98, Invalid=453, Unknown=1, NotChecked=0, Total=552 [2023-11-25 00:06:34,685 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 19 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:06:34,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 56 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:06:34,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-25 00:06:34,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2023-11-25 00:06:34,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 33 states have internal predecessors, (37), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-25 00:06:34,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2023-11-25 00:06:34,702 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 22 [2023-11-25 00:06:34,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:06:34,703 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2023-11-25 00:06:34,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-25 00:06:34,704 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2023-11-25 00:06:34,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-25 00:06:34,705 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:34,705 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:06:34,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-25 00:06:34,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:34,920 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:06:34,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:34,920 INFO L85 PathProgramCache]: Analyzing trace with hash -180405447, now seen corresponding path program 1 times [2023-11-25 00:06:34,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:34,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877084095] [2023-11-25 00:06:34,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:34,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:06:34,936 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:06:34,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1724622318] [2023-11-25 00:06:34,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:34,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:34,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:06:34,938 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:06:34,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-25 00:06:35,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:35,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-25 00:06:35,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:06:39,585 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:06:39,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:06:41,931 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:06:41,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:41,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877084095] [2023-11-25 00:06:41,932 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:06:41,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724622318] [2023-11-25 00:06:41,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724622318] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:06:41,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1992368933] [2023-11-25 00:06:41,935 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-25 00:06:41,935 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:06:41,936 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:06:41,936 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:06:41,936 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:06:42,875 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2023-11-25 00:06:42,901 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 96 for LOIs [2023-11-25 00:06:42,985 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:06:53,141 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1000#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_29| Int) (|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_45| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_27| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_29| Int)) (and (<= |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_45| 2147483647) (<= 0 |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_45|) (not (= (+ (* |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_27| 4) (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_29| |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_29|) (* 2 |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_29|) (* |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_45| 4)) (+ (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_29| 2) (* |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_29| |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_29|)))))))' at error location [2023-11-25 00:06:53,141 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:06:53,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-25 00:06:53,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2023-11-25 00:06:53,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483283142] [2023-11-25 00:06:53,142 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-25 00:06:53,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-25 00:06:53,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:06:53,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-25 00:06:53,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=474, Unknown=1, NotChecked=0, Total=552 [2023-11-25 00:06:53,144 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-25 00:06:55,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-25 00:06:57,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-25 00:06:59,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-25 00:07:01,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-25 00:07:03,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-25 00:07:05,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-25 00:07:05,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:07:05,418 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2023-11-25 00:07:05,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-25 00:07:05,419 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 22 [2023-11-25 00:07:05,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:07:05,420 INFO L225 Difference]: With dead ends: 59 [2023-11-25 00:07:05,420 INFO L226 Difference]: Without dead ends: 51 [2023-11-25 00:07:05,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=94, Invalid=555, Unknown=1, NotChecked=0, Total=650 [2023-11-25 00:07:05,422 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 16 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:07:05,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 124 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 4 Unknown, 0 Unchecked, 12.2s Time] [2023-11-25 00:07:05,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-25 00:07:05,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2023-11-25 00:07:05,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-25 00:07:05,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2023-11-25 00:07:05,439 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 22 [2023-11-25 00:07:05,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:07:05,440 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2023-11-25 00:07:05,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-25 00:07:05,441 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2023-11-25 00:07:05,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-25 00:07:05,442 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:07:05,442 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:07:05,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-25 00:07:05,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:07:05,647 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:07:05,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:07:05,647 INFO L85 PathProgramCache]: Analyzing trace with hash 408559265, now seen corresponding path program 1 times [2023-11-25 00:07:05,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:07:05,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923430112] [2023-11-25 00:07:05,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:07:05,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:07:05,656 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:07:05,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [455733105] [2023-11-25 00:07:05,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:07:05,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:07:05,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:07:05,658 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:07:05,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-25 00:07:05,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:07:05,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-25 00:07:05,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:07:05,776 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-25 00:07:05,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:07:05,882 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-25 00:07:05,882 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:07:05,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923430112] [2023-11-25 00:07:05,883 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:07:05,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455733105] [2023-11-25 00:07:05,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455733105] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:07:05,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [694298768] [2023-11-25 00:07:05,885 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-11-25 00:07:05,885 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:07:05,886 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:07:05,886 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:07:05,886 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:07:06,682 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 55 for LOIs [2023-11-25 00:07:06,741 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 92 for LOIs [2023-11-25 00:07:06,802 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:07:12,754 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1334#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_38| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_41| Int) (|v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_41| Int) (|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_63| Int)) (and (<= 0 |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_63|) (<= |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_63| 2147483647) (not (= (+ (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_41| 2) (* |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_41| |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_41|)) (+ (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_41| |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_41|) (* |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_38| 4) (* 2 |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_41|) (* |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_63| 4)))))))' at error location [2023-11-25 00:07:12,754 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:07:12,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-25 00:07:12,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2023-11-25 00:07:12,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398480574] [2023-11-25 00:07:12,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-25 00:07:12,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-25 00:07:12,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:07:12,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-25 00:07:12,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=512, Unknown=1, NotChecked=0, Total=600 [2023-11-25 00:07:12,757 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-25 00:07:12,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:07:12,934 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2023-11-25 00:07:12,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-25 00:07:12,934 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 28 [2023-11-25 00:07:12,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:07:12,935 INFO L225 Difference]: With dead ends: 50 [2023-11-25 00:07:12,935 INFO L226 Difference]: Without dead ends: 45 [2023-11-25 00:07:12,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=102, Invalid=599, Unknown=1, NotChecked=0, Total=702 [2023-11-25 00:07:12,937 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:07:12,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 78 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:07:12,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-25 00:07:12,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-11-25 00:07:12,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-25 00:07:12,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2023-11-25 00:07:12,952 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 28 [2023-11-25 00:07:12,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:07:12,952 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2023-11-25 00:07:12,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-25 00:07:12,952 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2023-11-25 00:07:12,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-25 00:07:12,954 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:07:12,954 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:07:12,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-25 00:07:13,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:07:13,156 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:07:13,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:07:13,156 INFO L85 PathProgramCache]: Analyzing trace with hash -235004718, now seen corresponding path program 2 times [2023-11-25 00:07:13,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:07:13,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114157150] [2023-11-25 00:07:13,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:07:13,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:07:13,166 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:07:13,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [142645985] [2023-11-25 00:07:13,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-25 00:07:13,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:07:13,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:07:13,167 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:07:13,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77bebb2-e17a-4690-ba0e-cd7d2d0a2959/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-25 00:07:13,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-25 00:07:13,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:07:13,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-25 00:07:13,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:07:13,819 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:07:13,820 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:07:13,924 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-25 00:07:13,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:07:13,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114157150] [2023-11-25 00:07:13,925 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:07:13,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142645985] [2023-11-25 00:07:13,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142645985] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:07:13,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1833261015] [2023-11-25 00:07:13,927 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-11-25 00:07:13,927 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:07:13,928 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:07:13,928 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:07:13,928 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:07:14,889 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 54 for LOIs [2023-11-25 00:07:14,940 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 92 for LOIs [2023-11-25 00:07:14,986 INFO L180 IcfgInterpreter]: Interpretation finished