./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d451988-e51c-470f-b73b-47a8a6452b2b/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d451988-e51c-470f-b73b-47a8a6452b2b/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d451988-e51c-470f-b73b-47a8a6452b2b/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d451988-e51c-470f-b73b-47a8a6452b2b/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d451988-e51c-470f-b73b-47a8a6452b2b/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d451988-e51c-470f-b73b-47a8a6452b2b/bin/utaipan-verify-nQ1chXbOIh --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 4615816b63186e8ef25ffa56a09fb574b90534edb7a787dbb36e36eb2c34dee2 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 18:59:39,224 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 18:59:39,293 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d451988-e51c-470f-b73b-47a8a6452b2b/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 18:59:39,297 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 18:59:39,298 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 18:59:39,319 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 18:59:39,320 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 18:59:39,320 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 18:59:39,321 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 18:59:39,322 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 18:59:39,322 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 18:59:39,323 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 18:59:39,323 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 18:59:39,324 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 18:59:39,324 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 18:59:39,325 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 18:59:39,325 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 18:59:39,326 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 18:59:39,326 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 18:59:39,327 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 18:59:39,328 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 18:59:39,329 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 18:59:39,329 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 18:59:39,330 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 18:59:39,330 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 18:59:39,331 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 18:59:39,331 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 18:59:39,332 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 18:59:39,332 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 18:59:39,333 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 18:59:39,333 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 18:59:39,333 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 18:59:39,334 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 18:59:39,334 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 18:59:39,334 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 18:59:39,334 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 18:59:39,334 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 18:59:39,335 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:59:39,335 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 18:59:39,335 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 18:59:39,335 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 18:59:39,336 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 18:59:39,336 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 18:59:39,336 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 18:59:39,336 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 18:59:39,336 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 18:59:39,337 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 18:59:39,337 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_1d451988-e51c-470f-b73b-47a8a6452b2b/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d451988-e51c-470f-b73b-47a8a6452b2b/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4615816b63186e8ef25ffa56a09fb574b90534edb7a787dbb36e36eb2c34dee2 [2023-12-02 18:59:39,554 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 18:59:39,576 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 18:59:39,579 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 18:59:39,581 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 18:59:39,581 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 18:59:39,582 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d451988-e51c-470f-b73b-47a8a6452b2b/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound10.c [2023-12-02 18:59:42,390 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 18:59:42,555 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 18:59:42,556 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d451988-e51c-470f-b73b-47a8a6452b2b/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound10.c [2023-12-02 18:59:42,564 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d451988-e51c-470f-b73b-47a8a6452b2b/bin/utaipan-verify-nQ1chXbOIh/data/711aff18c/6bec4ff11ddd4eed99b1f469286c3a5c/FLAG06884f9a4 [2023-12-02 18:59:42,579 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d451988-e51c-470f-b73b-47a8a6452b2b/bin/utaipan-verify-nQ1chXbOIh/data/711aff18c/6bec4ff11ddd4eed99b1f469286c3a5c [2023-12-02 18:59:42,582 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 18:59:42,584 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 18:59:42,585 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 18:59:42,585 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 18:59:42,591 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 18:59:42,592 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:59:42" (1/1) ... [2023-12-02 18:59:42,593 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12d6f174 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:59:42, skipping insertion in model container [2023-12-02 18:59:42,593 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:59:42" (1/1) ... [2023-12-02 18:59:42,615 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 18:59:42,744 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_1d451988-e51c-470f-b73b-47a8a6452b2b/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound10.c[520,533] [2023-12-02 18:59:42,760 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:59:42,769 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 18:59:42,780 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_1d451988-e51c-470f-b73b-47a8a6452b2b/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound10.c[520,533] [2023-12-02 18:59:42,787 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:59:42,799 INFO L206 MainTranslator]: Completed translation [2023-12-02 18:59:42,800 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:59:42 WrapperNode [2023-12-02 18:59:42,800 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 18:59:42,801 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 18:59:42,801 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 18:59:42,801 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 18:59:42,807 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:59:42" (1/1) ... [2023-12-02 18:59:42,813 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:59:42" (1/1) ... [2023-12-02 18:59:42,827 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2023-12-02 18:59:42,828 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 18:59:42,829 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 18:59:42,829 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 18:59:42,829 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 18:59:42,836 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:59:42" (1/1) ... [2023-12-02 18:59:42,836 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:59:42" (1/1) ... [2023-12-02 18:59:42,837 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:59:42" (1/1) ... [2023-12-02 18:59:42,837 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:59:42" (1/1) ... [2023-12-02 18:59:42,841 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:59:42" (1/1) ... [2023-12-02 18:59:42,844 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:59:42" (1/1) ... [2023-12-02 18:59:42,845 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:59:42" (1/1) ... [2023-12-02 18:59:42,846 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:59:42" (1/1) ... [2023-12-02 18:59:42,848 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 18:59:42,849 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 18:59:42,849 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 18:59:42,849 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 18:59:42,850 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:59:42" (1/1) ... [2023-12-02 18:59:42,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:59:42,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d451988-e51c-470f-b73b-47a8a6452b2b/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:59:42,882 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d451988-e51c-470f-b73b-47a8a6452b2b/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 18:59:42,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d451988-e51c-470f-b73b-47a8a6452b2b/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 18:59:42,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 18:59:42,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 18:59:42,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 18:59:42,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 18:59:42,915 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 18:59:42,915 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 18:59:42,978 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 18:59:42,980 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 18:59:43,117 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 18:59:43,142 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 18:59:43,143 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 18:59:43,144 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:59:43 BoogieIcfgContainer [2023-12-02 18:59:43,145 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 18:59:43,148 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 18:59:43,148 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 18:59:43,151 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 18:59:43,151 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 06:59:42" (1/3) ... [2023-12-02 18:59:43,152 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34b1c3a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:59:43, skipping insertion in model container [2023-12-02 18:59:43,152 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:59:42" (2/3) ... [2023-12-02 18:59:43,153 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34b1c3a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:59:43, skipping insertion in model container [2023-12-02 18:59:43,153 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:59:43" (3/3) ... [2023-12-02 18:59:43,154 INFO L112 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound10.c [2023-12-02 18:59:43,170 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 18:59:43,171 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 18:59:43,217 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 18:59:43,224 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;@75688a57, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 18:59:43,224 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 18:59:43,228 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 18:59:43,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 18:59:43,235 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:59:43,235 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 18:59:43,236 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:59:43,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:59:43,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1811081999, now seen corresponding path program 1 times [2023-12-02 18:59:43,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:59:43,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132143482] [2023-12-02 18:59:43,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:59:43,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:59:43,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:59:43,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:59:43,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:59:43,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132143482] [2023-12-02 18:59:43,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132143482] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:59:43,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:59:43,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 18:59:43,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894780741] [2023-12-02 18:59:43,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:59:43,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 18:59:43,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:59:43,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 18:59:43,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 18:59:43,438 INFO L87 Difference]: Start difference. First operand has 18 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2023-12-02 18:59:43,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:59:43,466 INFO L93 Difference]: Finished difference Result 35 states and 57 transitions. [2023-12-02 18:59:43,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 18:59:43,469 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 6 [2023-12-02 18:59:43,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:59:43,475 INFO L225 Difference]: With dead ends: 35 [2023-12-02 18:59:43,476 INFO L226 Difference]: Without dead ends: 16 [2023-12-02 18:59:43,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 18:59:43,483 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:59:43,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:59:43,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-12-02 18:59:43,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-12-02 18:59:43,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 18:59:43,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2023-12-02 18:59:43,516 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 6 [2023-12-02 18:59:43,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:59:43,516 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2023-12-02 18:59:43,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2023-12-02 18:59:43,517 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2023-12-02 18:59:43,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 18:59:43,517 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:59:43,517 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:59:43,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 18:59:43,518 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:59:43,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:59:43,519 INFO L85 PathProgramCache]: Analyzing trace with hash -772994646, now seen corresponding path program 1 times [2023-12-02 18:59:43,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:59:43,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608731997] [2023-12-02 18:59:43,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:59:43,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:59:43,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:59:43,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:59:43,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:59:43,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608731997] [2023-12-02 18:59:43,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608731997] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:59:43,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:59:43,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:59:43,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682698447] [2023-12-02 18:59:43,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:59:43,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:59:43,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:59:43,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:59:43,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:59:43,635 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand has 4 states, 4 states have (on average 1.5) 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) [2023-12-02 18:59:43,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:59:43,657 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2023-12-02 18:59:43,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:59:43,658 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) 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 [2023-12-02 18:59:43,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:59:43,659 INFO L225 Difference]: With dead ends: 27 [2023-12-02 18:59:43,659 INFO L226 Difference]: Without dead ends: 18 [2023-12-02 18:59:43,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:59:43,662 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:59:43,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:59:43,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-12-02 18:59:43,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-12-02 18:59:43,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 18:59:43,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2023-12-02 18:59:43,671 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 7 [2023-12-02 18:59:43,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:59:43,671 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2023-12-02 18:59:43,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) 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) [2023-12-02 18:59:43,672 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2023-12-02 18:59:43,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 18:59:43,672 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:59:43,673 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:59:43,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 18:59:43,673 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:59:43,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:59:43,674 INFO L85 PathProgramCache]: Analyzing trace with hash -771326350, now seen corresponding path program 1 times [2023-12-02 18:59:43,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:59:43,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704765840] [2023-12-02 18:59:43,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:59:43,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:59:43,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:59:43,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:59:43,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:59:43,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704765840] [2023-12-02 18:59:43,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704765840] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:59:43,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:59:43,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:59:43,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083305141] [2023-12-02 18:59:43,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:59:43,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:59:43,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:59:43,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:59:43,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:59:43,836 INFO L87 Difference]: Start difference. First operand 18 states and 24 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) [2023-12-02 18:59:43,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:59:43,895 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2023-12-02 18:59:43,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 18:59:43,896 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 [2023-12-02 18:59:43,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:59:43,897 INFO L225 Difference]: With dead ends: 24 [2023-12-02 18:59:43,897 INFO L226 Difference]: Without dead ends: 22 [2023-12-02 18:59:43,898 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 [2023-12-02 18:59:43,899 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 8 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:59:43,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 50 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:59:43,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-02 18:59:43,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-12-02 18:59:43,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 18:59:43,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2023-12-02 18:59:43,913 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 7 [2023-12-02 18:59:43,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:59:43,913 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2023-12-02 18:59:43,913 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) [2023-12-02 18:59:43,914 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2023-12-02 18:59:43,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 18:59:43,914 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:59:43,915 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:59:43,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 18:59:43,915 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:59:43,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:59:43,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1515882446, now seen corresponding path program 1 times [2023-12-02 18:59:43,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:59:43,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082240933] [2023-12-02 18:59:43,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:59:43,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:59:43,931 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 18:59:43,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1640791440] [2023-12-02 18:59:43,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:59:43,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:59:43,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d451988-e51c-470f-b73b-47a8a6452b2b/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:59:43,937 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d451988-e51c-470f-b73b-47a8a6452b2b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:59:43,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d451988-e51c-470f-b73b-47a8a6452b2b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 18:59:43,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:59:43,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 18:59:44,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:59:44,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:59:44,129 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:59:44,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:59:44,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:59:44,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082240933] [2023-12-02 18:59:44,284 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 18:59:44,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640791440] [2023-12-02 18:59:44,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640791440] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:59:44,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1515848568] [2023-12-02 18:59:44,304 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 18:59:44,304 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:59:44,308 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:59:44,313 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:59:44,314 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:59:44,547 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 36 for LOIs [2023-12-02 18:59:44,573 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:59:44,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1515848568] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:59:44,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 18:59:44,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 7] total 17 [2023-12-02 18:59:44,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500797106] [2023-12-02 18:59:44,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:59:44,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 18:59:44,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:59:44,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 18:59:44,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2023-12-02 18:59:44,916 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 18:59:45,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:59:45,077 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2023-12-02 18:59:45,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 18:59:45,078 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 1 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 [2023-12-02 18:59:45,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:59:45,079 INFO L225 Difference]: With dead ends: 39 [2023-12-02 18:59:45,079 INFO L226 Difference]: Without dead ends: 34 [2023-12-02 18:59:45,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2023-12-02 18:59:45,081 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:59:45,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 41 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:59:45,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-12-02 18:59:45,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-12-02 18:59:45,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 18:59:45,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2023-12-02 18:59:45,097 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 12 [2023-12-02 18:59:45,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:59:45,098 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2023-12-02 18:59:45,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 18:59:45,098 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2023-12-02 18:59:45,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 18:59:45,099 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:59:45,099 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:59:45,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d451988-e51c-470f-b73b-47a8a6452b2b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 18:59:45,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d451988-e51c-470f-b73b-47a8a6452b2b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:59:45,306 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:59:45,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:59:45,306 INFO L85 PathProgramCache]: Analyzing trace with hash 247503605, now seen corresponding path program 1 times [2023-12-02 18:59:45,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:59:45,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365362477] [2023-12-02 18:59:45,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:59:45,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:59:45,319 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 18:59:45,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [773266200] [2023-12-02 18:59:45,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:59:45,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:59:45,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d451988-e51c-470f-b73b-47a8a6452b2b/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:59:45,321 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d451988-e51c-470f-b73b-47a8a6452b2b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:59:45,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d451988-e51c-470f-b73b-47a8a6452b2b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 18:59:45,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:59:45,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 18:59:45,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:59:45,417 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 18:59:45,417 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:59:45,470 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 18:59:45,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:59:45,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365362477] [2023-12-02 18:59:45,471 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 18:59:45,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773266200] [2023-12-02 18:59:45,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773266200] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:59:45,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [634911913] [2023-12-02 18:59:45,474 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 18:59:45,474 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:59:45,475 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:59:45,475 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:59:45,475 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:59:46,612 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-12-02 18:59:46,618 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:59:46,925 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '613#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 18:59:46,926 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:59:46,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 18:59:46,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-12-02 18:59:46,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809371577] [2023-12-02 18:59:46,926 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 18:59:46,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 18:59:46,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:59:46,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 18:59:46,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-12-02 18:59:46,928 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-02 18:59:47,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:59:47,055 INFO L93 Difference]: Finished difference Result 87 states and 104 transitions. [2023-12-02 18:59:47,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 18:59:47,057 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 30 [2023-12-02 18:59:47,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:59:47,059 INFO L225 Difference]: With dead ends: 87 [2023-12-02 18:59:47,059 INFO L226 Difference]: Without dead ends: 74 [2023-12-02 18:59:47,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2023-12-02 18:59:47,061 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 33 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:59:47,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 76 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:59:47,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-12-02 18:59:47,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2023-12-02 18:59:47,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 40 states have (on average 1.175) internal successors, (47), 43 states have internal predecessors, (47), 21 states have call successors, (21), 8 states have call predecessors, (21), 8 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-12-02 18:59:47,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2023-12-02 18:59:47,084 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 30 [2023-12-02 18:59:47,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:59:47,084 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2023-12-02 18:59:47,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-02 18:59:47,085 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2023-12-02 18:59:47,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 18:59:47,086 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:59:47,086 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:59:47,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d451988-e51c-470f-b73b-47a8a6452b2b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 18:59:47,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d451988-e51c-470f-b73b-47a8a6452b2b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:59:47,289 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:59:47,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:59:47,289 INFO L85 PathProgramCache]: Analyzing trace with hash 2103548909, now seen corresponding path program 1 times [2023-12-02 18:59:47,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:59:47,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186459563] [2023-12-02 18:59:47,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:59:47,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:59:47,300 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 18:59:47,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [816957027] [2023-12-02 18:59:47,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:59:47,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:59:47,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d451988-e51c-470f-b73b-47a8a6452b2b/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:59:47,302 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d451988-e51c-470f-b73b-47a8a6452b2b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:59:47,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d451988-e51c-470f-b73b-47a8a6452b2b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 18:59:47,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:59:47,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-02 18:59:47,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:59:47,461 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 18:59:47,461 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:59:47,612 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 18:59:47,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:59:47,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186459563] [2023-12-02 18:59:47,613 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 18:59:47,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816957027] [2023-12-02 18:59:47,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816957027] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:59:47,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1012440221] [2023-12-02 18:59:47,616 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-12-02 18:59:47,616 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:59:47,616 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:59:47,617 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:59:47,617 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:59:48,599 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2023-12-02 18:59:48,605 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:59:48,893 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1047#(and (<= ~counter~0 10) (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 18:59:48,893 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:59:48,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 18:59:48,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-12-02 18:59:48,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051226895] [2023-12-02 18:59:48,894 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 18:59:48,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 18:59:48,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:59:48,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 18:59:48,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2023-12-02 18:59:48,896 INFO L87 Difference]: Start difference. First operand 70 states and 86 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 18:59:49,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:59:49,088 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2023-12-02 18:59:49,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 18:59:49,089 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 30 [2023-12-02 18:59:49,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:59:49,089 INFO L225 Difference]: With dead ends: 70 [2023-12-02 18:59:49,089 INFO L226 Difference]: Without dead ends: 0 [2023-12-02 18:59:49,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2023-12-02 18:59:49,092 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 22 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:59:49,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 64 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:59:49,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-02 18:59:49,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-02 18:59:49,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:59:49,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-02 18:59:49,093 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2023-12-02 18:59:49,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:59:49,093 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-02 18:59:49,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 18:59:49,094 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-02 18:59:49,094 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-02 18:59:49,096 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-02 18:59:49,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d451988-e51c-470f-b73b-47a8a6452b2b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 18:59:49,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d451988-e51c-470f-b73b-47a8a6452b2b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:59:49,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-12-02 18:59:49,603 INFO L899 garLoopResultBuilder]: For program point L33(lines 30 42) no Hoare annotation was computed. [2023-12-02 18:59:49,603 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-12-02 18:59:49,604 INFO L895 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|))) (and (= (+ .cse0 1 (* 2 |ULTIMATE.start_main_~a~0#1|)) |ULTIMATE.start_main_~s~0#1|) (= (+ .cse0 2 (* |ULTIMATE.start_main_~a~0#1| 4)) (+ |ULTIMATE.start_main_~s~0#1| |ULTIMATE.start_main_~t~0#1|)))) [2023-12-02 18:59:49,604 INFO L895 garLoopResultBuilder]: At program point L31-1(line 31) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|))) (and (= (+ .cse0 1 (* 2 |ULTIMATE.start_main_~a~0#1|)) |ULTIMATE.start_main_~s~0#1|) (= (+ .cse0 2 (* |ULTIMATE.start_main_~a~0#1| 4)) (+ |ULTIMATE.start_main_~s~0#1| |ULTIMATE.start_main_~t~0#1|)))) [2023-12-02 18:59:49,604 INFO L899 garLoopResultBuilder]: For program point L46(line 46) no Hoare annotation was computed. [2023-12-02 18:59:49,604 INFO L895 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|))) (and (= (+ .cse0 1 (* 2 |ULTIMATE.start_main_~a~0#1|)) |ULTIMATE.start_main_~s~0#1|) (= (+ .cse0 2 (* |ULTIMATE.start_main_~a~0#1| 4)) (+ |ULTIMATE.start_main_~s~0#1| |ULTIMATE.start_main_~t~0#1|)))) [2023-12-02 18:59:49,605 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-12-02 18:59:49,605 INFO L895 garLoopResultBuilder]: At program point L32(line 32) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|))) (and (= (+ .cse0 1 (* 2 |ULTIMATE.start_main_~a~0#1|)) |ULTIMATE.start_main_~s~0#1|) (= (+ .cse0 2 (* |ULTIMATE.start_main_~a~0#1| 4)) (+ |ULTIMATE.start_main_~s~0#1| |ULTIMATE.start_main_~t~0#1|)))) [2023-12-02 18:59:49,605 INFO L899 garLoopResultBuilder]: For program point L30-1(lines 30 42) no Hoare annotation was computed. [2023-12-02 18:59:49,605 INFO L895 garLoopResultBuilder]: At program point L30-3(lines 30 42) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|))) (and (= (+ .cse0 1 (* 2 |ULTIMATE.start_main_~a~0#1|)) |ULTIMATE.start_main_~s~0#1|) (= (+ .cse0 2 (* |ULTIMATE.start_main_~a~0#1| 4)) (+ |ULTIMATE.start_main_~s~0#1| |ULTIMATE.start_main_~t~0#1|)))) [2023-12-02 18:59:49,605 INFO L895 garLoopResultBuilder]: At program point L30-4(lines 30 42) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|))) (and (= (+ .cse0 1 (* 2 |ULTIMATE.start_main_~a~0#1|)) |ULTIMATE.start_main_~s~0#1|) (= (+ .cse0 2 (* |ULTIMATE.start_main_~a~0#1| 4)) (+ |ULTIMATE.start_main_~s~0#1| |ULTIMATE.start_main_~t~0#1|)))) [2023-12-02 18:59:49,606 INFO L895 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|))) (and (= (+ .cse0 1 (* 2 |ULTIMATE.start_main_~a~0#1|)) |ULTIMATE.start_main_~s~0#1|) (= (+ .cse0 2 (* |ULTIMATE.start_main_~a~0#1| 4)) (+ |ULTIMATE.start_main_~s~0#1| |ULTIMATE.start_main_~t~0#1|)))) [2023-12-02 18:59:49,606 INFO L899 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed. [2023-12-02 18:59:49,606 INFO L899 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed. [2023-12-02 18:59:49,606 INFO L899 garLoopResultBuilder]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2023-12-02 18:59:49,606 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2023-12-02 18:59:49,606 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 11 17) the Hoare annotation is: true [2023-12-02 18:59:49,606 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2023-12-02 18:59:49,609 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-12-02 18:59:49,611 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 18:59:49,620 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 06:59:49 BoogieIcfgContainer [2023-12-02 18:59:49,621 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 18:59:49,621 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 18:59:49,621 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 18:59:49,621 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 18:59:49,622 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:59:43" (3/4) ... [2023-12-02 18:59:49,623 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-12-02 18:59:49,626 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2023-12-02 18:59:49,630 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2023-12-02 18:59:49,631 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2023-12-02 18:59:49,631 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-12-02 18:59:49,631 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-12-02 18:59:49,705 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d451988-e51c-470f-b73b-47a8a6452b2b/bin/utaipan-verify-nQ1chXbOIh/witness.graphml [2023-12-02 18:59:49,706 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d451988-e51c-470f-b73b-47a8a6452b2b/bin/utaipan-verify-nQ1chXbOIh/witness.yml [2023-12-02 18:59:49,706 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 18:59:49,707 INFO L158 Benchmark]: Toolchain (without parser) took 7123.27ms. Allocated memory was 136.3MB in the beginning and 213.9MB in the end (delta: 77.6MB). Free memory was 91.2MB in the beginning and 101.3MB in the end (delta: -10.1MB). Peak memory consumption was 69.4MB. Max. memory is 16.1GB. [2023-12-02 18:59:49,707 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 102.8MB. Free memory is still 54.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 18:59:49,708 INFO L158 Benchmark]: CACSL2BoogieTranslator took 215.32ms. Allocated memory is still 136.3MB. Free memory was 91.2MB in the beginning and 80.5MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-12-02 18:59:49,708 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.82ms. Allocated memory is still 136.3MB. Free memory was 80.5MB in the beginning and 79.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 18:59:49,709 INFO L158 Benchmark]: Boogie Preprocessor took 19.62ms. Allocated memory is still 136.3MB. Free memory was 79.0MB in the beginning and 77.9MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 18:59:49,709 INFO L158 Benchmark]: RCFGBuilder took 295.74ms. Allocated memory is still 136.3MB. Free memory was 77.9MB in the beginning and 66.5MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-12-02 18:59:49,710 INFO L158 Benchmark]: TraceAbstraction took 6472.88ms. Allocated memory was 136.3MB in the beginning and 213.9MB in the end (delta: 77.6MB). Free memory was 66.0MB in the beginning and 105.5MB in the end (delta: -39.4MB). Peak memory consumption was 40.0MB. Max. memory is 16.1GB. [2023-12-02 18:59:49,710 INFO L158 Benchmark]: Witness Printer took 85.07ms. Allocated memory is still 213.9MB. Free memory was 105.5MB in the beginning and 101.3MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-12-02 18:59:49,712 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 102.8MB. Free memory is still 54.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 215.32ms. Allocated memory is still 136.3MB. Free memory was 91.2MB in the beginning and 80.5MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.82ms. Allocated memory is still 136.3MB. Free memory was 80.5MB in the beginning and 79.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 19.62ms. Allocated memory is still 136.3MB. Free memory was 79.0MB in the beginning and 77.9MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 295.74ms. Allocated memory is still 136.3MB. Free memory was 77.9MB in the beginning and 66.5MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 6472.88ms. Allocated memory was 136.3MB in the beginning and 213.9MB in the end (delta: 77.6MB). Free memory was 66.0MB in the beginning and 105.5MB in the end (delta: -39.4MB). Peak memory consumption was 40.0MB. Max. memory is 16.1GB. * Witness Printer took 85.07ms. Allocated memory is still 213.9MB. Free memory was 105.5MB in the beginning and 101.3MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * 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 - PositiveResult [Line: 14]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6.4s, OverallIterations: 6, TraceHistogramMax: 5, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 73 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 64 mSDsluCounter, 309 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 204 mSDsCounter, 69 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 226 IncrementalHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 69 mSolverCounterUnsat, 105 mSDtfsCounter, 226 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 226 GetRequests, 160 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=5, InterpolantAutomatonStates: 36, 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, 6 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 43 PreInvPairs, 72 NumberOfFragments, 162 HoareAnnotationTreeSize, 43 FomulaSimplifications, 153 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 1516 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 92 NumberOfCodeBlocks, 92 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 155 ConstructedInterpolants, 0 QuantifiedInterpolants, 604 SizeOfPredicates, 7 NumberOfNonLiveVariables, 240 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 113/144 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: 0.3s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 10, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 10, TOOLS_POST_TIME: 0.1s, TOOLS_POST_CALL_APPLICATIONS: 4, TOOLS_POST_CALL_TIME: 0.1s, TOOLS_POST_RETURN_APPLICATIONS: 2, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 16, TOOLS_QUANTIFIERELIM_TIME: 0.2s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 27, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 3, DOMAIN_JOIN_TIME: 0.0s, 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: 10, 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: 2, 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: 57, DAG_COMPRESSION_RETAINED_NODES: 31, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: (((((a * a) + 1) + (2 * a)) == s) && ((((a * a) + 2) + (a * 4)) == (s + t))) RESULT: Ultimate proved your program to be correct! [2023-12-02 18:59:49,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d451988-e51c-470f-b73b-47a8a6452b2b/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE