./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire --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 c7383f54d0aefdd248f516d45c67549426beac87be78bf6e7bb8108aedb7974b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:37:15,298 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:37:15,363 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 20:37:15,369 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:37:15,369 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:37:15,396 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:37:15,397 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:37:15,398 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:37:15,399 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:37:15,399 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:37:15,400 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:37:15,401 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:37:15,401 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:37:15,402 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:37:15,402 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:37:15,403 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:37:15,403 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:37:15,404 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:37:15,404 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:37:15,405 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:37:15,406 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:37:15,406 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:37:15,407 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:37:15,407 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:37:15,408 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:37:15,408 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:37:15,409 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:37:15,409 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:37:15,410 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:37:15,410 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:37:15,410 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:37:15,411 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:37:15,411 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:37:15,412 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:37:15,412 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:37:15,412 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:37:15,412 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:37:15,413 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:37:15,413 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:37:15,413 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:37:15,414 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:37:15,414 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:37:15,414 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:37:15,415 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:37:15,415 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:37:15,415 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:37:15,415 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:37:15,416 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_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7383f54d0aefdd248f516d45c67549426beac87be78bf6e7bb8108aedb7974b [2023-11-23 20:37:15,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:37:15,723 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:37:15,726 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:37:15,728 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:37:15,729 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:37:15,730 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound1.c [2023-11-23 20:37:18,848 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:37:19,126 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:37:19,127 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound1.c [2023-11-23 20:37:19,136 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/data/a2b0b43e6/ffda6a9a453a4f3eb3ffb17a36ef30f8/FLAGa0b5ae0e4 [2023-11-23 20:37:19,154 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/data/a2b0b43e6/ffda6a9a453a4f3eb3ffb17a36ef30f8 [2023-11-23 20:37:19,161 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:37:19,164 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:37:19,168 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:37:19,169 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:37:19,175 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:37:19,177 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:37:19" (1/1) ... [2023-11-23 20:37:19,179 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e35fbb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:19, skipping insertion in model container [2023-11-23 20:37:19,179 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:37:19" (1/1) ... [2023-11-23 20:37:19,208 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:37:19,413 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_9e4d840c-05f9-40ad-971a-2e783825ed31/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound1.c[526,539] [2023-11-23 20:37:19,434 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:37:19,456 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:37:19,471 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_9e4d840c-05f9-40ad-971a-2e783825ed31/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound1.c[526,539] [2023-11-23 20:37:19,491 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:37:19,512 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:37:19,517 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:19 WrapperNode [2023-11-23 20:37:19,518 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:37:19,519 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:37:19,519 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:37:19,519 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:37:19,528 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:19" (1/1) ... [2023-11-23 20:37:19,536 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:19" (1/1) ... [2023-11-23 20:37:19,557 INFO L138 Inliner]: procedures = 14, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2023-11-23 20:37:19,558 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:37:19,560 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:37:19,561 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:37:19,562 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:37:19,573 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:19" (1/1) ... [2023-11-23 20:37:19,573 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:19" (1/1) ... [2023-11-23 20:37:19,575 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:19" (1/1) ... [2023-11-23 20:37:19,575 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:19" (1/1) ... [2023-11-23 20:37:19,579 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:19" (1/1) ... [2023-11-23 20:37:19,589 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:19" (1/1) ... [2023-11-23 20:37:19,596 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:19" (1/1) ... [2023-11-23 20:37:19,597 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:19" (1/1) ... [2023-11-23 20:37:19,599 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:37:19,601 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:37:19,601 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:37:19,601 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:37:19,602 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:19" (1/1) ... [2023-11-23 20:37:19,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:37:19,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:19,640 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:37:19,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:37:19,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:37:19,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:37:19,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:37:19,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:37:19,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 20:37:19,685 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 20:37:19,757 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:37:19,760 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:37:20,065 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:37:20,114 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:37:20,115 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 20:37:20,116 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:37:20 BoogieIcfgContainer [2023-11-23 20:37:20,117 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:37:20,119 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:37:20,120 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:37:20,124 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:37:20,124 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:37:19" (1/3) ... [2023-11-23 20:37:20,125 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@262e75dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:37:20, skipping insertion in model container [2023-11-23 20:37:20,125 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:19" (2/3) ... [2023-11-23 20:37:20,126 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@262e75dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:37:20, skipping insertion in model container [2023-11-23 20:37:20,126 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:37:20" (3/3) ... [2023-11-23 20:37:20,128 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound1.c [2023-11-23 20:37:20,156 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:37:20,157 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 20:37:20,207 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:37:20,216 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;@6989e004, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:37:20,216 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 20:37:20,221 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-23 20:37:20,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-23 20:37:20,230 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:20,231 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:20,231 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:20,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:20,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1291730102, now seen corresponding path program 1 times [2023-11-23 20:37:20,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:20,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885978658] [2023-11-23 20:37:20,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:20,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:20,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:20,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:20,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885978658] [2023-11-23 20:37:20,426 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-23 20:37:20,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429952511] [2023-11-23 20:37:20,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:20,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:20,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:20,429 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:20,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:37:20,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:20,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-23 20:37:20,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:37:20,572 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:20,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429952511] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:20,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:20,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:37:20,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78490541] [2023-11-23 20:37:20,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:20,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 20:37:20,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:20,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 20:37:20,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 20:37:20,630 INFO L87 Difference]: Start difference. First operand has 22 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:37:20,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:20,683 INFO L93 Difference]: Finished difference Result 43 states and 74 transitions. [2023-11-23 20:37:20,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 20:37:20,686 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-23 20:37:20,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:20,693 INFO L225 Difference]: With dead ends: 43 [2023-11-23 20:37:20,694 INFO L226 Difference]: Without dead ends: 20 [2023-11-23 20:37:20,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 20:37:20,704 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:20,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 20:37:20,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-23 20:37:20,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-23 20:37:20,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-23 20:37:20,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 29 transitions. [2023-11-23 20:37:20,751 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 29 transitions. Word has length 7 [2023-11-23 20:37:20,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:20,752 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 29 transitions. [2023-11-23 20:37:20,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:37:20,754 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 29 transitions. [2023-11-23 20:37:20,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-23 20:37:20,756 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:20,756 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:20,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:20,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:20,983 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:20,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:20,985 INFO L85 PathProgramCache]: Analyzing trace with hash 829671692, now seen corresponding path program 1 times [2023-11-23 20:37:20,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:20,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48920711] [2023-11-23 20:37:20,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:20,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:21,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:21,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:37:21,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:21,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48920711] [2023-11-23 20:37:21,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48920711] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:21,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:21,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:37:21,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999690770] [2023-11-23 20:37:21,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:21,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:37:21,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:21,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:37:21,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:37:21,164 INFO L87 Difference]: Start difference. First operand 20 states and 29 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:37:21,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:21,246 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2023-11-23 20:37:21,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 20:37:21,247 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-23 20:37:21,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:21,249 INFO L225 Difference]: With dead ends: 33 [2023-11-23 20:37:21,249 INFO L226 Difference]: Without dead ends: 31 [2023-11-23 20:37:21,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:37:21,251 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 13 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:21,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 81 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 20:37:21,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-23 20:37:21,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2023-11-23 20:37:21,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-23 20:37:21,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2023-11-23 20:37:21,262 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 7 [2023-11-23 20:37:21,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:21,263 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2023-11-23 20:37:21,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:37:21,263 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2023-11-23 20:37:21,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 20:37:21,264 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:21,265 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:21,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 20:37:21,265 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:21,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:21,266 INFO L85 PathProgramCache]: Analyzing trace with hash -166824855, now seen corresponding path program 1 times [2023-11-23 20:37:21,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:21,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419236410] [2023-11-23 20:37:21,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:21,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:21,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:21,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:21,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419236410] [2023-11-23 20:37:21,289 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-23 20:37:21,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378033112] [2023-11-23 20:37:21,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:21,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:21,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:21,291 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:21,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 20:37:21,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:21,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:37:21,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:21,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:37:21,418 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:21,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378033112] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:21,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:21,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:37:21,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285820598] [2023-11-23 20:37:21,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:21,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:37:21,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:21,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:37:21,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:37:21,422 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:37:21,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:21,449 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2023-11-23 20:37:21,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:37:21,450 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-23 20:37:21,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:21,452 INFO L225 Difference]: With dead ends: 39 [2023-11-23 20:37:21,452 INFO L226 Difference]: Without dead ends: 26 [2023-11-23 20:37:21,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:37:21,455 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:21,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 73 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 20:37:21,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-23 20:37:21,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-23 20:37:21,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-23 20:37:21,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2023-11-23 20:37:21,465 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 9 [2023-11-23 20:37:21,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:21,466 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2023-11-23 20:37:21,466 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:37:21,467 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2023-11-23 20:37:21,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-23 20:37:21,467 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:21,468 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:21,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:21,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:21,689 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:21,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:21,690 INFO L85 PathProgramCache]: Analyzing trace with hash -439138420, now seen corresponding path program 1 times [2023-11-23 20:37:21,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:21,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302411586] [2023-11-23 20:37:21,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:21,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:21,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:21,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:37:21,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:21,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302411586] [2023-11-23 20:37:21,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302411586] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:21,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:21,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 20:37:21,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959843195] [2023-11-23 20:37:21,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:21,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:37:21,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:21,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:37:21,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:37:21,926 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:37:22,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:22,010 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2023-11-23 20:37:22,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 20:37:22,011 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-11-23 20:37:22,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:22,012 INFO L225 Difference]: With dead ends: 39 [2023-11-23 20:37:22,014 INFO L226 Difference]: Without dead ends: 37 [2023-11-23 20:37:22,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:37:22,017 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 11 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:22,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 81 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:37:22,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-23 20:37:22,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2023-11-23 20:37:22,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-23 20:37:22,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2023-11-23 20:37:22,040 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 12 [2023-11-23 20:37:22,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:22,041 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2023-11-23 20:37:22,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:37:22,043 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2023-11-23 20:37:22,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-23 20:37:22,044 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:22,044 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:22,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 20:37:22,045 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:22,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:22,046 INFO L85 PathProgramCache]: Analyzing trace with hash -235147060, now seen corresponding path program 1 times [2023-11-23 20:37:22,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:22,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624420828] [2023-11-23 20:37:22,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:22,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:22,058 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:37:22,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1200926202] [2023-11-23 20:37:22,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:22,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:22,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:22,065 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:22,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 20:37:22,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:22,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 20:37:22,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:22,269 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:37:22,269 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:22,269 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:22,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624420828] [2023-11-23 20:37:22,270 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:37:22,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200926202] [2023-11-23 20:37:22,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200926202] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:22,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:22,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 20:37:22,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888695420] [2023-11-23 20:37:22,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:22,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:37:22,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:22,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:37:22,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:37:22,275 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 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) [2023-11-23 20:37:22,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:22,380 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2023-11-23 20:37:22,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:37:22,381 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 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 17 [2023-11-23 20:37:22,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:22,386 INFO L225 Difference]: With dead ends: 58 [2023-11-23 20:37:22,386 INFO L226 Difference]: Without dead ends: 44 [2023-11-23 20:37:22,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:37:22,390 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 10 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:22,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 81 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:37:22,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-23 20:37:22,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-11-23 20:37:22,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 28 states have internal predecessors, (33), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-23 20:37:22,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 57 transitions. [2023-11-23 20:37:22,422 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 57 transitions. Word has length 17 [2023-11-23 20:37:22,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:22,424 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 57 transitions. [2023-11-23 20:37:22,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 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) [2023-11-23 20:37:22,427 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 57 transitions. [2023-11-23 20:37:22,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-23 20:37:22,428 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:22,429 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:22,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:22,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:22,644 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:22,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:22,644 INFO L85 PathProgramCache]: Analyzing trace with hash 2012527405, now seen corresponding path program 1 times [2023-11-23 20:37:22,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:22,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937000881] [2023-11-23 20:37:22,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:22,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:22,656 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:37:22,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1391159868] [2023-11-23 20:37:22,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:22,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:22,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:22,658 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:22,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 20:37:22,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:22,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 20:37:22,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:22,769 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 20:37:22,769 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:22,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:22,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937000881] [2023-11-23 20:37:22,769 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:37:22,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391159868] [2023-11-23 20:37:22,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391159868] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:22,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:22,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:37:22,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243168653] [2023-11-23 20:37:22,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:22,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:37:22,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:22,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:37:22,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:37:22,772 INFO L87 Difference]: Start difference. First operand 44 states and 57 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 20:37:22,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:22,797 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2023-11-23 20:37:22,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:37:22,798 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2023-11-23 20:37:22,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:22,799 INFO L225 Difference]: With dead ends: 59 [2023-11-23 20:37:22,799 INFO L226 Difference]: Without dead ends: 38 [2023-11-23 20:37:22,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:37:22,801 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:22,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 36 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 20:37:22,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-23 20:37:22,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-11-23 20:37:22,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-23 20:37:22,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2023-11-23 20:37:22,811 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 25 [2023-11-23 20:37:22,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:22,812 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2023-11-23 20:37:22,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 20:37:22,812 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2023-11-23 20:37:22,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-23 20:37:22,813 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:22,813 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:22,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:23,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-23 20:37:23,035 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:23,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:23,036 INFO L85 PathProgramCache]: Analyzing trace with hash 2010799527, now seen corresponding path program 1 times [2023-11-23 20:37:23,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:23,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240191243] [2023-11-23 20:37:23,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:23,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:23,044 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:37:23,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1640103744] [2023-11-23 20:37:23,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:23,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:23,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:23,047 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:23,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 20:37:23,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:23,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 20:37:23,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:23,239 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 20:37:23,240 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:37:23,459 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 20:37:23,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:23,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240191243] [2023-11-23 20:37:23,460 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:37:23,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640103744] [2023-11-23 20:37:23,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640103744] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:37:23,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [406848956] [2023-11-23 20:37:23,482 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-23 20:37:23,483 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:37:23,487 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:37:23,492 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:37:23,493 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:37:24,686 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 10 for LOIs [2023-11-23 20:37:24,695 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:37:25,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [406848956] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:25,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 20:37:25,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 7] total 18 [2023-11-23 20:37:25,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741019548] [2023-11-23 20:37:25,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:25,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 20:37:25,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:25,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 20:37:25,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2023-11-23 20:37:25,871 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 20:37:26,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:26,094 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2023-11-23 20:37:26,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 20:37:26,095 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2023-11-23 20:37:26,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:26,096 INFO L225 Difference]: With dead ends: 52 [2023-11-23 20:37:26,097 INFO L226 Difference]: Without dead ends: 43 [2023-11-23 20:37:26,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2023-11-23 20:37:26,099 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:26,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:37:26,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-23 20:37:26,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-11-23 20:37:26,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-23 20:37:26,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2023-11-23 20:37:26,125 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 25 [2023-11-23 20:37:26,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:26,125 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2023-11-23 20:37:26,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 20:37:26,126 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2023-11-23 20:37:26,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-23 20:37:26,127 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:26,127 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:26,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:26,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-23 20:37:26,336 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:26,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:26,337 INFO L85 PathProgramCache]: Analyzing trace with hash 2126032012, now seen corresponding path program 1 times [2023-11-23 20:37:26,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:26,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266641445] [2023-11-23 20:37:26,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:26,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:26,361 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:37:26,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [531448442] [2023-11-23 20:37:26,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:26,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:26,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:26,371 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:26,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 20:37:26,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:26,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 20:37:26,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:26,498 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-23 20:37:26,499 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:26,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:26,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266641445] [2023-11-23 20:37:26,499 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:37:26,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531448442] [2023-11-23 20:37:26,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531448442] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:26,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:26,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 20:37:26,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255378379] [2023-11-23 20:37:26,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:26,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:37:26,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:26,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:37:26,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:37:26,502 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 20:37:26,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:26,556 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2023-11-23 20:37:26,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:37:26,556 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2023-11-23 20:37:26,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:26,559 INFO L225 Difference]: With dead ends: 49 [2023-11-23 20:37:26,559 INFO L226 Difference]: Without dead ends: 47 [2023-11-23 20:37:26,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:37:26,561 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:26,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 45 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 20:37:26,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-23 20:37:26,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-11-23 20:37:26,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.096774193548387) internal successors, (34), 32 states have internal predecessors, (34), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-23 20:37:26,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2023-11-23 20:37:26,586 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 27 [2023-11-23 20:37:26,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:26,586 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2023-11-23 20:37:26,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 20:37:26,586 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2023-11-23 20:37:26,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-23 20:37:26,590 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:26,591 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:26,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:26,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:26,812 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:26,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:26,812 INFO L85 PathProgramCache]: Analyzing trace with hash 2049051340, now seen corresponding path program 1 times [2023-11-23 20:37:26,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:26,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458226174] [2023-11-23 20:37:26,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:26,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:26,836 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:37:26,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1154399970] [2023-11-23 20:37:26,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:26,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:26,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:26,839 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:26,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 20:37:26,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 20:37:26,902 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 20:37:26,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 20:37:26,955 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-23 20:37:26,955 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-23 20:37:26,957 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-23 20:37:26,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:27,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:27,190 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:27,193 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-23 20:37:27,216 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-11-23 20:37:27,220 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-11-23 20:37:27,221 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-23 20:37:27,239 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 08:37:27 BoogieIcfgContainer [2023-11-23 20:37:27,239 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-23 20:37:27,240 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-23 20:37:27,240 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-23 20:37:27,241 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-23 20:37:27,241 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:37:20" (3/4) ... [2023-11-23 20:37:27,242 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-23 20:37:27,259 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-11-23 20:37:27,263 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-11-23 20:37:27,265 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-23 20:37:27,334 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/witness.graphml [2023-11-23 20:37:27,334 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-23 20:37:27,335 INFO L158 Benchmark]: Toolchain (without parser) took 8171.44ms. Allocated memory was 132.1MB in the beginning and 211.8MB in the end (delta: 79.7MB). Free memory was 89.3MB in the beginning and 182.9MB in the end (delta: -93.6MB). Peak memory consumption was 90.0MB. Max. memory is 16.1GB. [2023-11-23 20:37:27,336 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 98.6MB. Free memory was 69.7MB in the beginning and 69.6MB in the end (delta: 29.7kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 20:37:27,336 INFO L158 Benchmark]: CACSL2BoogieTranslator took 349.86ms. Allocated memory is still 132.1MB. Free memory was 89.3MB in the beginning and 78.3MB in the end (delta: 11.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-23 20:37:27,336 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.13ms. Allocated memory is still 132.1MB. Free memory was 78.3MB in the beginning and 76.6MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 20:37:27,337 INFO L158 Benchmark]: Boogie Preprocessor took 39.38ms. Allocated memory is still 132.1MB. Free memory was 76.6MB in the beginning and 75.6MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 20:37:27,337 INFO L158 Benchmark]: RCFGBuilder took 516.46ms. Allocated memory is still 132.1MB. Free memory was 75.6MB in the beginning and 97.6MB in the end (delta: -22.0MB). Peak memory consumption was 8.6MB. Max. memory is 16.1GB. [2023-11-23 20:37:27,338 INFO L158 Benchmark]: TraceAbstraction took 7120.15ms. Allocated memory was 132.1MB in the beginning and 176.2MB in the end (delta: 44.0MB). Free memory was 97.4MB in the beginning and 49.5MB in the end (delta: 47.8MB). Peak memory consumption was 96.1MB. Max. memory is 16.1GB. [2023-11-23 20:37:27,339 INFO L158 Benchmark]: Witness Printer took 94.33ms. Allocated memory was 176.2MB in the beginning and 211.8MB in the end (delta: 35.7MB). Free memory was 49.5MB in the beginning and 182.9MB in the end (delta: -133.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 20:37:27,341 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 98.6MB. Free memory was 69.7MB in the beginning and 69.6MB in the end (delta: 29.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 349.86ms. Allocated memory is still 132.1MB. Free memory was 89.3MB in the beginning and 78.3MB in the end (delta: 11.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.13ms. Allocated memory is still 132.1MB. Free memory was 78.3MB in the beginning and 76.6MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 39.38ms. Allocated memory is still 132.1MB. Free memory was 76.6MB in the beginning and 75.6MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 516.46ms. Allocated memory is still 132.1MB. Free memory was 75.6MB in the beginning and 97.6MB in the end (delta: -22.0MB). Peak memory consumption was 8.6MB. Max. memory is 16.1GB. * TraceAbstraction took 7120.15ms. Allocated memory was 132.1MB in the beginning and 176.2MB in the end (delta: 44.0MB). Free memory was 97.4MB in the beginning and 49.5MB in the end (delta: 47.8MB). Peak memory consumption was 96.1MB. Max. memory is 16.1GB. * Witness Printer took 94.33ms. Allocated memory was 176.2MB in the beginning and 211.8MB in the end (delta: 35.7MB). Free memory was 49.5MB in the beginning and 182.9MB in the end (delta: -133.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; [L24] int A, B; [L25] int r, d, p, q; [L26] A = __VERIFIER_nondet_int() [L27] B = 1 [L29] r = A [L30] d = B [L31] p = 1 [L32] q = 0 VAL [A=1, B=1, counter=0, d=1, p=1, q=0, r=1] [L34] EXPR counter++ VAL [A=1, B=1, counter=1, d=1, p=1, q=0, r=1] [L34] COND TRUE counter++<1 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L35] RET __VERIFIER_assert(q == 0) VAL [A=1, B=1, counter=1, d=1, p=1, q=0, r=1] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L36] RET __VERIFIER_assert(r == A) VAL [A=1, B=1, counter=1, d=1, p=1, q=0, r=1] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=1, B=1, counter=1, d=1, p=1, q=0, r=1] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [A=1, B=1, counter=1, d=2, p=2, q=0, r=1] [L34] EXPR counter++ VAL [A=1, B=1, counter=2, d=2, p=2, q=0, r=1] [L34] COND FALSE !(counter++<1) [L44] EXPR counter++ VAL [A=1, B=1, counter=3, d=2, p=2, q=0, r=1] [L44] COND FALSE !(counter++<1) [L58] CALL __VERIFIER_assert(A == d*q + r) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L58] RET __VERIFIER_assert(A == d*q + r) VAL [A=1, B=1, counter=3, d=2, p=2, q=0, r=1] [L59] CALL __VERIFIER_assert(B == d) VAL [\old(cond)=0, counter=3] [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=3] [L17] reach_error() VAL [\old(cond)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.0s, OverallIterations: 9, TraceHistogramMax: 5, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 64 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 48 mSDsluCounter, 481 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 314 mSDsCounter, 8 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 269 IncrementalHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 8 mSolverCounterUnsat, 167 mSDtfsCounter, 269 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 167 GetRequests, 125 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=8, InterpolantAutomatonStates: 43, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 14 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 177 NumberOfCodeBlocks, 177 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 145 ConstructedInterpolants, 0 QuantifiedInterpolants, 476 SizeOfPredicates, 6 NumberOfNonLiveVariables, 518 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 9 InterpolantComputations, 7 PerfectInterpolantSequences, 70/84 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 1.2s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 17, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 13, TOOLS_POST_TIME: 0.2s, TOOLS_POST_CALL_APPLICATIONS: 10, TOOLS_POST_CALL_TIME: 0.4s, TOOLS_POST_RETURN_APPLICATIONS: 6, TOOLS_POST_RETURN_TIME: 0.2s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 29, TOOLS_QUANTIFIERELIM_TIME: 0.8s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 41, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 13, DOMAIN_JOIN_TIME: 0.3s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 17, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 6, CALL_SUMMARIZER_CACHE_MISSES: 1, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 153, DAG_COMPRESSION_RETAINED_NODES: 45, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-11-23 20:37:27,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e4d840c-05f9-40ad-971a-2e783825ed31/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE