./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/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_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/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_129bb950-c9c2-43cf-ba64-e3de644d05bc/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 4aef2940f6d326843487f003443fc222e2136d386047f492f8bd5c7e21afc8f5 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 12:48:03,354 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 12:48:03,415 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 12:48:03,421 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 12:48:03,421 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 12:48:03,457 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 12:48:03,457 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 12:48:03,457 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 12:48:03,458 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 12:48:03,459 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 12:48:03,459 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 12:48:03,460 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 12:48:03,460 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 12:48:03,461 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 12:48:03,462 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 12:48:03,462 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 12:48:03,463 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 12:48:03,463 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 12:48:03,464 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 12:48:03,464 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 12:48:03,465 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 12:48:03,466 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 12:48:03,466 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 12:48:03,467 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 12:48:03,467 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 12:48:03,468 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 12:48:03,468 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 12:48:03,469 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 12:48:03,469 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 12:48:03,470 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 12:48:03,470 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 12:48:03,470 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 12:48:03,475 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 12:48:03,476 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 12:48:03,476 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 12:48:03,476 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 12:48:03,476 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 12:48:03,476 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:48:03,477 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 12:48:03,477 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 12:48:03,477 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 12:48:03,477 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 12:48:03,478 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 12:48:03,478 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 12:48:03,478 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 12:48:03,478 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 12:48:03,478 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 12:48:03,478 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_129bb950-c9c2-43cf-ba64-e3de644d05bc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4aef2940f6d326843487f003443fc222e2136d386047f492f8bd5c7e21afc8f5 [2023-12-02 12:48:03,708 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 12:48:03,728 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 12:48:03,731 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 12:48:03,732 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 12:48:03,732 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 12:48:03,734 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound20.c [2023-12-02 12:48:06,513 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 12:48:06,658 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 12:48:06,659 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound20.c [2023-12-02 12:48:06,664 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/data/c2645bdff/69a6eede1c934af29dfb8d87315ead17/FLAG955759f4a [2023-12-02 12:48:06,675 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/data/c2645bdff/69a6eede1c934af29dfb8d87315ead17 [2023-12-02 12:48:06,677 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 12:48:06,678 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 12:48:06,679 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 12:48:06,679 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 12:48:06,683 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 12:48:06,684 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:48:06" (1/1) ... [2023-12-02 12:48:06,685 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17fbb433 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:48:06, skipping insertion in model container [2023-12-02 12:48:06,685 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:48:06" (1/1) ... [2023-12-02 12:48:06,703 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 12:48:06,838 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_129bb950-c9c2-43cf-ba64-e3de644d05bc/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound20.c[489,502] [2023-12-02 12:48:06,856 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:48:06,866 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 12:48:06,877 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_129bb950-c9c2-43cf-ba64-e3de644d05bc/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound20.c[489,502] [2023-12-02 12:48:06,885 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:48:06,898 INFO L206 MainTranslator]: Completed translation [2023-12-02 12:48:06,898 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:48:06 WrapperNode [2023-12-02 12:48:06,898 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 12:48:06,899 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 12:48:06,899 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 12:48:06,899 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 12:48:06,905 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:48:06" (1/1) ... [2023-12-02 12:48:06,910 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:48:06" (1/1) ... [2023-12-02 12:48:06,925 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 60 [2023-12-02 12:48:06,926 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 12:48:06,926 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 12:48:06,926 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 12:48:06,926 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 12:48:06,935 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:48:06" (1/1) ... [2023-12-02 12:48:06,935 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:48:06" (1/1) ... [2023-12-02 12:48:06,936 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:48:06" (1/1) ... [2023-12-02 12:48:06,937 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:48:06" (1/1) ... [2023-12-02 12:48:06,940 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:48:06" (1/1) ... [2023-12-02 12:48:06,944 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:48:06" (1/1) ... [2023-12-02 12:48:06,945 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:48:06" (1/1) ... [2023-12-02 12:48:06,946 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:48:06" (1/1) ... [2023-12-02 12:48:06,948 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 12:48:06,949 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 12:48:06,949 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 12:48:06,949 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 12:48:06,950 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:48:06" (1/1) ... [2023-12-02 12:48:06,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:48:06,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:48:06,979 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 12:48:06,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 12:48:07,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 12:48:07,005 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 12:48:07,005 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 12:48:07,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 12:48:07,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 12:48:07,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 12:48:07,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 12:48:07,006 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 12:48:07,059 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 12:48:07,061 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 12:48:07,174 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 12:48:07,209 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 12:48:07,209 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 12:48:07,211 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:48:07 BoogieIcfgContainer [2023-12-02 12:48:07,211 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 12:48:07,214 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 12:48:07,214 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 12:48:07,217 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 12:48:07,218 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:48:06" (1/3) ... [2023-12-02 12:48:07,218 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b625135 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:48:07, skipping insertion in model container [2023-12-02 12:48:07,219 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:48:06" (2/3) ... [2023-12-02 12:48:07,219 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b625135 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:48:07, skipping insertion in model container [2023-12-02 12:48:07,219 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:48:07" (3/3) ... [2023-12-02 12:48:07,221 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound20.c [2023-12-02 12:48:07,239 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 12:48:07,239 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 12:48:07,281 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 12:48:07,289 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;@af2cf82, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 12:48:07,289 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 12:48:07,293 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 12:48:07,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 12:48:07,299 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:48:07,300 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:48:07,301 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:48:07,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:48:07,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1798315609, now seen corresponding path program 1 times [2023-12-02 12:48:07,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:48:07,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362156673] [2023-12-02 12:48:07,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:48:07,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:48:07,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:48:07,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:48:07,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:48:07,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362156673] [2023-12-02 12:48:07,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362156673] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:48:07,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:48:07,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 12:48:07,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422521899] [2023-12-02 12:48:07,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:48:07,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 12:48:07,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:48:07,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 12:48:07,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 12:48:07,503 INFO L87 Difference]: Start difference. First operand has 24 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 12:48:07,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:48:07,539 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2023-12-02 12:48:07,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 12:48:07,541 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2023-12-02 12:48:07,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:48:07,549 INFO L225 Difference]: With dead ends: 42 [2023-12-02 12:48:07,549 INFO L226 Difference]: Without dead ends: 22 [2023-12-02 12:48:07,552 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 12:48:07,556 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:48:07,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:48:07,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-02 12:48:07,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-12-02 12:48:07,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 12:48:07,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2023-12-02 12:48:07,597 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 13 [2023-12-02 12:48:07,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:48:07,598 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2023-12-02 12:48:07,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 12:48:07,599 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2023-12-02 12:48:07,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 12:48:07,600 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:48:07,600 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:48:07,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 12:48:07,601 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:48:07,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:48:07,602 INFO L85 PathProgramCache]: Analyzing trace with hash -740021117, now seen corresponding path program 1 times [2023-12-02 12:48:07,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:48:07,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336785330] [2023-12-02 12:48:07,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:48:07,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:48:07,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:48:07,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:48:07,748 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:48:07,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336785330] [2023-12-02 12:48:07,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336785330] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:48:07,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:48:07,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 12:48:07,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68366915] [2023-12-02 12:48:07,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:48:07,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:48:07,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:48:07,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:48:07,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:48:07,752 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 12:48:07,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:48:07,792 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2023-12-02 12:48:07,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:48:07,793 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2023-12-02 12:48:07,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:48:07,794 INFO L225 Difference]: With dead ends: 34 [2023-12-02 12:48:07,794 INFO L226 Difference]: Without dead ends: 24 [2023-12-02 12:48:07,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 12:48:07,797 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 3 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:48:07,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 69 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:48:07,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-12-02 12:48:07,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-12-02 12:48:07,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 12:48:07,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2023-12-02 12:48:07,807 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 14 [2023-12-02 12:48:07,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:48:07,807 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2023-12-02 12:48:07,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 12:48:07,808 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2023-12-02 12:48:07,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 12:48:07,808 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:48:07,809 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:48:07,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 12:48:07,809 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:48:07,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:48:07,810 INFO L85 PathProgramCache]: Analyzing trace with hash -738352821, now seen corresponding path program 1 times [2023-12-02 12:48:07,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:48:07,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514127798] [2023-12-02 12:48:07,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:48:07,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:48:07,828 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:48:07,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1676639429] [2023-12-02 12:48:07,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:48:07,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:48:07,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:48:07,833 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:48:07,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 12:48:07,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:48:07,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 12:48:07,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:48:08,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 12:48:08,016 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:48:08,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:48:08,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514127798] [2023-12-02 12:48:08,017 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:48:08,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676639429] [2023-12-02 12:48:08,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676639429] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:48:08,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:48:08,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 12:48:08,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535538495] [2023-12-02 12:48:08,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:48:08,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:48:08,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:48:08,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:48:08,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:48:08,020 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 12:48:08,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:48:08,100 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2023-12-02 12:48:08,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 12:48:08,101 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2023-12-02 12:48:08,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:48:08,102 INFO L225 Difference]: With dead ends: 38 [2023-12-02 12:48:08,103 INFO L226 Difference]: Without dead ends: 36 [2023-12-02 12:48:08,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:48:08,105 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:48:08,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 97 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:48:08,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-12-02 12:48:08,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2023-12-02 12:48:08,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-12-02 12:48:08,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2023-12-02 12:48:08,118 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 14 [2023-12-02 12:48:08,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:48:08,119 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2023-12-02 12:48:08,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 12:48:08,119 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2023-12-02 12:48:08,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 12:48:08,120 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:48:08,120 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:48:08,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 12:48:08,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:48:08,321 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:48:08,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:48:08,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1930727335, now seen corresponding path program 1 times [2023-12-02 12:48:08,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:48:08,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926079755] [2023-12-02 12:48:08,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:48:08,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:48:08,337 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:48:08,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [101583747] [2023-12-02 12:48:08,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:48:08,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:48:08,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:48:08,340 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:48:08,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 12:48:08,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:48:08,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-02 12:48:08,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:48:08,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 12:48:08,569 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:48:08,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:48:08,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926079755] [2023-12-02 12:48:08,685 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:48:08,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101583747] [2023-12-02 12:48:08,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101583747] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:48:08,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1349367319] [2023-12-02 12:48:08,705 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-12-02 12:48:08,705 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:48:08,708 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:48:08,712 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:48:08,712 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:48:09,318 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 36 for LOIs [2023-12-02 12:48:09,339 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 64 for LOIs [2023-12-02 12:48:09,391 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:48:10,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1349367319] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:48:10,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:48:10,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [10] total 20 [2023-12-02 12:48:10,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949527148] [2023-12-02 12:48:10,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:48:10,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 12:48:10,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:48:10,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 12:48:10,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2023-12-02 12:48:10,418 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand has 12 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 12:48:10,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:48:10,671 INFO L93 Difference]: Finished difference Result 42 states and 55 transitions. [2023-12-02 12:48:10,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 12:48:10,671 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 19 [2023-12-02 12:48:10,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:48:10,672 INFO L225 Difference]: With dead ends: 42 [2023-12-02 12:48:10,672 INFO L226 Difference]: Without dead ends: 38 [2023-12-02 12:48:10,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2023-12-02 12:48:10,675 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:48:10,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 46 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:48:10,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-12-02 12:48:10,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-12-02 12:48:10,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 12:48:10,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2023-12-02 12:48:10,689 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 19 [2023-12-02 12:48:10,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:48:10,689 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2023-12-02 12:48:10,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 12:48:10,690 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2023-12-02 12:48:10,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 12:48:10,691 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:48:10,691 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:48:10,696 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 12:48:10,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:48:10,898 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:48:10,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:48:10,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1385830456, now seen corresponding path program 1 times [2023-12-02 12:48:10,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:48:10,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148682824] [2023-12-02 12:48:10,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:48:10,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:48:10,911 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:48:10,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [263755601] [2023-12-02 12:48:10,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:48:10,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:48:10,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:48:10,913 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:48:10,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 12:48:10,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:48:10,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 12:48:10,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:48:10,980 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 12:48:10,981 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:48:10,981 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:48:10,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148682824] [2023-12-02 12:48:10,981 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:48:10,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263755601] [2023-12-02 12:48:10,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263755601] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:48:10,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:48:10,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 12:48:10,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945747419] [2023-12-02 12:48:10,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:48:10,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 12:48:10,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:48:10,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 12:48:10,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 12:48:10,984 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-12-02 12:48:11,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:48:11,040 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2023-12-02 12:48:11,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 12:48:11,041 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 30 [2023-12-02 12:48:11,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:48:11,042 INFO L225 Difference]: With dead ends: 48 [2023-12-02 12:48:11,043 INFO L226 Difference]: Without dead ends: 46 [2023-12-02 12:48:11,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 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 12:48:11,044 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 5 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:48:11,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 106 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:48:11,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-12-02 12:48:11,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2023-12-02 12:48:11,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 25 states have internal predecessors, (26), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-12-02 12:48:11,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2023-12-02 12:48:11,059 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 30 [2023-12-02 12:48:11,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:48:11,060 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2023-12-02 12:48:11,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-12-02 12:48:11,060 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2023-12-02 12:48:11,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 12:48:11,061 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:48:11,062 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:48:11,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 12:48:11,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:48:11,265 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:48:11,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:48:11,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1128008437, now seen corresponding path program 1 times [2023-12-02 12:48:11,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:48:11,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826348701] [2023-12-02 12:48:11,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:48:11,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:48:11,274 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:48:11,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2139587784] [2023-12-02 12:48:11,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:48:11,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:48:11,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:48:11,276 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:48:11,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 12:48:11,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:48:11,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 12:48:11,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:48:11,384 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 12:48:11,384 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:48:11,437 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 12:48:11,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:48:11,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826348701] [2023-12-02 12:48:11,437 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:48:11,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139587784] [2023-12-02 12:48:11,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139587784] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:48:11,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [22085895] [2023-12-02 12:48:11,440 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-12-02 12:48:11,440 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:48:11,441 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:48:11,441 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:48:11,441 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:48:12,688 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-12-02 12:48:12,692 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 64 for LOIs [2023-12-02 12:48:12,727 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:48:27,600 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1020#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 12:48:27,600 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:48:27,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:48:27,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-12-02 12:48:27,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372716749] [2023-12-02 12:48:27,600 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:48:27,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 12:48:27,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:48:27,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 12:48:27,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=410, Unknown=3, NotChecked=0, Total=506 [2023-12-02 12:48:27,602 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-02 12:48:27,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:48:27,756 INFO L93 Difference]: Finished difference Result 105 states and 129 transitions. [2023-12-02 12:48:27,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 12:48:27,756 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 32 [2023-12-02 12:48:27,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:48:27,759 INFO L225 Difference]: With dead ends: 105 [2023-12-02 12:48:27,759 INFO L226 Difference]: Without dead ends: 93 [2023-12-02 12:48:27,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=113, Invalid=534, Unknown=3, NotChecked=0, Total=650 [2023-12-02 12:48:27,761 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 43 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:48:27,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 122 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:48:27,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-12-02 12:48:27,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87. [2023-12-02 12:48:27,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 51 states have internal predecessors, (55), 29 states have call successors, (29), 11 states have call predecessors, (29), 10 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2023-12-02 12:48:27,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 109 transitions. [2023-12-02 12:48:27,780 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 109 transitions. Word has length 32 [2023-12-02 12:48:27,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:48:27,781 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 109 transitions. [2023-12-02 12:48:27,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-02 12:48:27,781 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 109 transitions. [2023-12-02 12:48:27,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 12:48:27,782 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:48:27,782 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:48:27,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 12:48:27,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:48:27,984 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:48:27,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:48:27,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1126340141, now seen corresponding path program 1 times [2023-12-02 12:48:27,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:48:27,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607375985] [2023-12-02 12:48:27,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:48:27,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:48:27,991 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:48:27,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [225760061] [2023-12-02 12:48:27,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:48:27,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:48:27,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:48:27,993 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:48:27,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 12:48:28,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:48:28,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 12:48:28,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:48:28,273 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 12:48:28,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:48:28,502 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 12:48:28,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:48:28,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607375985] [2023-12-02 12:48:28,503 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:48:28,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225760061] [2023-12-02 12:48:28,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225760061] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 12:48:28,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:48:28,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-12-02 12:48:28,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076831620] [2023-12-02 12:48:28,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:48:28,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 12:48:28,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:48:28,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 12:48:28,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-02 12:48:28,506 INFO L87 Difference]: Start difference. First operand 87 states and 109 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 12:48:28,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:48:28,584 INFO L93 Difference]: Finished difference Result 101 states and 122 transitions. [2023-12-02 12:48:28,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 12:48:28,585 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2023-12-02 12:48:28,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:48:28,587 INFO L225 Difference]: With dead ends: 101 [2023-12-02 12:48:28,587 INFO L226 Difference]: Without dead ends: 99 [2023-12-02 12:48:28,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-12-02 12:48:28,589 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 8 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:48:28,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 75 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:48:28,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-12-02 12:48:28,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2023-12-02 12:48:28,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 60 states have internal predecessors, (64), 29 states have call successors, (29), 14 states have call predecessors, (29), 13 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2023-12-02 12:48:28,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2023-12-02 12:48:28,613 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 118 transitions. Word has length 32 [2023-12-02 12:48:28,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:48:28,614 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 118 transitions. [2023-12-02 12:48:28,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 12:48:28,614 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 118 transitions. [2023-12-02 12:48:28,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-02 12:48:28,615 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:48:28,615 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:48:28,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-02 12:48:28,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:48:28,817 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:48:28,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:48:28,817 INFO L85 PathProgramCache]: Analyzing trace with hash -2087905654, now seen corresponding path program 1 times [2023-12-02 12:48:28,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:48:28,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193653211] [2023-12-02 12:48:28,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:48:28,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:48:28,825 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:48:28,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1755289732] [2023-12-02 12:48:28,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:48:28,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:48:28,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:48:28,827 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:48:28,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 12:48:28,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:48:28,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 12:48:28,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:48:28,952 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 12:48:28,952 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:48:29,052 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 12:48:29,052 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:48:29,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193653211] [2023-12-02 12:48:29,053 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:48:29,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755289732] [2023-12-02 12:48:29,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755289732] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:48:29,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1315952236] [2023-12-02 12:48:29,055 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 12:48:29,055 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:48:29,056 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:48:29,056 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:48:29,056 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:48:29,492 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 36 for LOIs [2023-12-02 12:48:29,505 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 64 for LOIs [2023-12-02 12:48:29,538 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:48:30,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1315952236] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:48:30,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:48:30,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [9, 8] total 23 [2023-12-02 12:48:30,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365173917] [2023-12-02 12:48:30,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:48:30,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 12:48:30,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:48:30,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 12:48:30,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2023-12-02 12:48:30,558 INFO L87 Difference]: Start difference. First operand 99 states and 118 transitions. Second operand has 13 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-02 12:48:30,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:48:30,786 INFO L93 Difference]: Finished difference Result 101 states and 119 transitions. [2023-12-02 12:48:30,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 12:48:30,786 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 35 [2023-12-02 12:48:30,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:48:30,788 INFO L225 Difference]: With dead ends: 101 [2023-12-02 12:48:30,788 INFO L226 Difference]: Without dead ends: 91 [2023-12-02 12:48:30,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 79 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2023-12-02 12:48:30,789 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:48:30,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:48:30,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-12-02 12:48:30,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2023-12-02 12:48:30,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 55 states have internal predecessors, (58), 27 states have call successors, (27), 12 states have call predecessors, (27), 12 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2023-12-02 12:48:30,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2023-12-02 12:48:30,808 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 35 [2023-12-02 12:48:30,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:48:30,808 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2023-12-02 12:48:30,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-02 12:48:30,808 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2023-12-02 12:48:30,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-02 12:48:30,810 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:48:30,810 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:48:30,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 12:48:31,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:48:31,013 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:48:31,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:48:31,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1860492319, now seen corresponding path program 2 times [2023-12-02 12:48:31,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:48:31,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559360780] [2023-12-02 12:48:31,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:48:31,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:48:31,020 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:48:31,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [993436401] [2023-12-02 12:48:31,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:48:31,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:48:31,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:48:31,022 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:48:31,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 12:48:31,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 12:48:31,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:48:31,069 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 12:48:31,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:48:31,371 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-02 12:48:31,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:48:31,697 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 12:48:31,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:48:31,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559360780] [2023-12-02 12:48:31,698 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:48:31,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993436401] [2023-12-02 12:48:31,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993436401] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:48:31,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1093686390] [2023-12-02 12:48:31,700 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-12-02 12:48:31,700 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:48:31,701 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:48:31,701 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:48:31,701 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:48:32,600 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-12-02 12:48:32,605 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 64 for LOIs [2023-12-02 12:48:32,627 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:48:51,365 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2561#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 12:48:51,366 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:48:51,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:48:51,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2023-12-02 12:48:51,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579947039] [2023-12-02 12:48:51,366 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:48:51,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 12:48:51,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:48:51,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 12:48:51,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=601, Unknown=4, NotChecked=0, Total=702 [2023-12-02 12:48:51,367 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2023-12-02 12:48:55,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:48:55,481 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2023-12-02 12:48:55,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 12:48:55,482 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) Word has length 37 [2023-12-02 12:48:55,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:48:55,483 INFO L225 Difference]: With dead ends: 101 [2023-12-02 12:48:55,484 INFO L226 Difference]: Without dead ends: 99 [2023-12-02 12:48:55,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=131, Invalid=795, Unknown=4, NotChecked=0, Total=930 [2023-12-02 12:48:55,485 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 25 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:48:55,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 144 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 12:48:55,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-12-02 12:48:55,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2023-12-02 12:48:55,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 57 states have (on average 1.1228070175438596) internal successors, (64), 61 states have internal predecessors, (64), 27 states have call successors, (27), 14 states have call predecessors, (27), 14 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2023-12-02 12:48:55,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 115 transitions. [2023-12-02 12:48:55,501 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 115 transitions. Word has length 37 [2023-12-02 12:48:55,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:48:55,501 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 115 transitions. [2023-12-02 12:48:55,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2023-12-02 12:48:55,501 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 115 transitions. [2023-12-02 12:48:55,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-02 12:48:55,502 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:48:55,502 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:48:55,506 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 12:48:55,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:48:55,703 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:48:55,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:48:55,703 INFO L85 PathProgramCache]: Analyzing trace with hash -209579757, now seen corresponding path program 3 times [2023-12-02 12:48:55,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:48:55,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329874575] [2023-12-02 12:48:55,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:48:55,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:48:55,711 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:48:55,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [832364711] [2023-12-02 12:48:55,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 12:48:55,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:48:55,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:48:55,713 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:48:55,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 12:48:55,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 12:48:55,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:48:55,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 12:48:55,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:48:56,124 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 12:48:56,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:48:57,045 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 12:48:57,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:48:57,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329874575] [2023-12-02 12:48:57,045 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:48:57,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832364711] [2023-12-02 12:48:57,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832364711] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:48:57,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1927689952] [2023-12-02 12:48:57,047 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-12-02 12:48:57,047 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:48:57,047 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:48:57,047 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:48:57,047 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:48:57,775 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-12-02 12:48:57,780 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 64 for LOIs [2023-12-02 12:48:57,801 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:49:18,801 WARN L293 SmtUtils]: Spent 8.38s on a formula simplification. DAG size of input: 109 DAG size of output: 107 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:49:27,604 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3137#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 12:49:27,604 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:49:27,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:49:27,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-12-02 12:49:27,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145819474] [2023-12-02 12:49:27,605 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:49:27,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 12:49:27,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:49:27,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 12:49:27,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=751, Unknown=5, NotChecked=0, Total=870 [2023-12-02 12:49:27,606 INFO L87 Difference]: Start difference. First operand 99 states and 115 transitions. Second operand has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2023-12-02 12:49:31,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:49:31,797 INFO L93 Difference]: Finished difference Result 116 states and 133 transitions. [2023-12-02 12:49:31,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 12:49:31,797 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) Word has length 42 [2023-12-02 12:49:31,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:49:31,799 INFO L225 Difference]: With dead ends: 116 [2023-12-02 12:49:31,799 INFO L226 Difference]: Without dead ends: 102 [2023-12-02 12:49:31,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 33.8s TimeCoverageRelationStatistics Valid=149, Invalid=968, Unknown=5, NotChecked=0, Total=1122 [2023-12-02 12:49:31,801 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 22 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:49:31,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 210 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 12:49:31,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-12-02 12:49:31,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 93. [2023-12-02 12:49:31,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 61 states have internal predecessors, (64), 19 states have call successors, (19), 15 states have call predecessors, (19), 14 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2023-12-02 12:49:31,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100 transitions. [2023-12-02 12:49:31,818 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 100 transitions. Word has length 42 [2023-12-02 12:49:31,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:49:31,819 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 100 transitions. [2023-12-02 12:49:31,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2023-12-02 12:49:31,819 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 100 transitions. [2023-12-02 12:49:31,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-02 12:49:31,820 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:49:31,820 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:49:31,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 12:49:32,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 12:49:32,021 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:49:32,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:49:32,022 INFO L85 PathProgramCache]: Analyzing trace with hash 484799234, now seen corresponding path program 1 times [2023-12-02 12:49:32,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:49:32,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964142288] [2023-12-02 12:49:32,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:49:32,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:49:32,030 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:49:32,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1858877220] [2023-12-02 12:49:32,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:49:32,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:49:32,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:49:32,032 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:49:32,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 12:49:32,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:49:32,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 12:49:32,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:49:32,162 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 41 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-12-02 12:49:32,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:49:32,291 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 41 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-12-02 12:49:32,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:49:32,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964142288] [2023-12-02 12:49:32,292 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:49:32,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858877220] [2023-12-02 12:49:32,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858877220] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:49:32,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [507210627] [2023-12-02 12:49:32,294 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 12:49:32,294 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:49:32,294 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:49:32,294 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:49:32,294 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:49:33,209 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-12-02 12:49:33,215 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 64 for LOIs [2023-12-02 12:49:33,235 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:50:07,781 WARN L293 SmtUtils]: Spent 8.14s on a formula simplification that was a NOOP. DAG size: 32 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:50:07,782 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3784#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 12:50:07,782 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:50:07,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:50:07,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2023-12-02 12:50:07,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987792534] [2023-12-02 12:50:07,783 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:50:07,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 12:50:07,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:50:07,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 12:50:07,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=641, Unknown=4, NotChecked=0, Total=756 [2023-12-02 12:50:07,784 INFO L87 Difference]: Start difference. First operand 93 states and 100 transitions. Second operand has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2023-12-02 12:50:07,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:50:07,927 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2023-12-02 12:50:07,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 12:50:07,928 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 53 [2023-12-02 12:50:07,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:50:07,929 INFO L225 Difference]: With dead ends: 104 [2023-12-02 12:50:07,929 INFO L226 Difference]: Without dead ends: 84 [2023-12-02 12:50:07,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 34.7s TimeCoverageRelationStatistics Valid=127, Invalid=739, Unknown=4, NotChecked=0, Total=870 [2023-12-02 12:50:07,930 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 15 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:50:07,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 90 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:50:07,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-12-02 12:50:07,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2023-12-02 12:50:07,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 54 states have (on average 1.037037037037037) internal successors, (56), 55 states have internal predecessors, (56), 16 states have call successors, (16), 13 states have call predecessors, (16), 13 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-12-02 12:50:07,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2023-12-02 12:50:07,948 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 53 [2023-12-02 12:50:07,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:50:07,948 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2023-12-02 12:50:07,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2023-12-02 12:50:07,949 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2023-12-02 12:50:07,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-02 12:50:07,950 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:50:07,950 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:50:07,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 12:50:08,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:50:08,151 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:50:08,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:50:08,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1893559055, now seen corresponding path program 4 times [2023-12-02 12:50:08,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:50:08,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711348312] [2023-12-02 12:50:08,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:50:08,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:50:08,160 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:50:08,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [426543282] [2023-12-02 12:50:08,160 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 12:50:08,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:50:08,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:50:08,161 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:50:08,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 12:50:08,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:50:08,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-02 12:50:08,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:50:12,323 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 68 proven. 46 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2023-12-02 12:50:12,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:50:17,413 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 68 proven. 45 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2023-12-02 12:50:17,413 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:50:17,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711348312] [2023-12-02 12:50:17,413 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:50:17,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426543282] [2023-12-02 12:50:17,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426543282] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:50:17,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1033583492] [2023-12-02 12:50:17,416 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-12-02 12:50:17,416 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:50:17,416 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:50:17,416 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:50:17,416 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:50:18,123 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-12-02 12:50:18,129 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 64 for LOIs [2023-12-02 12:50:18,148 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:50:32,137 WARN L293 SmtUtils]: Spent 9.24s on a formula simplification. DAG size of input: 109 DAG size of output: 108 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:50:40,673 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4522#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 12:50:40,673 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:50:40,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:50:40,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2023-12-02 12:50:40,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042683000] [2023-12-02 12:50:40,673 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:50:40,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-02 12:50:40,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:50:40,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-02 12:50:40,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1156, Unknown=1, NotChecked=0, Total=1332 [2023-12-02 12:50:40,676 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand has 22 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 16 states have internal predecessors, (40), 14 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2023-12-02 12:50:47,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 12:50:49,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 12:50:50,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:50:50,367 INFO L93 Difference]: Finished difference Result 103 states and 110 transitions. [2023-12-02 12:50:50,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 12:50:50,368 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 16 states have internal predecessors, (40), 14 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) Word has length 73 [2023-12-02 12:50:50,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:50:50,369 INFO L225 Difference]: With dead ends: 103 [2023-12-02 12:50:50,369 INFO L226 Difference]: Without dead ends: 101 [2023-12-02 12:50:50,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 180 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 28.4s TimeCoverageRelationStatistics Valid=272, Invalid=1619, Unknown=1, NotChecked=0, Total=1892 [2023-12-02 12:50:50,371 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 43 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 62 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2023-12-02 12:50:50,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 296 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 287 Invalid, 2 Unknown, 0 Unchecked, 5.7s Time] [2023-12-02 12:50:50,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-12-02 12:50:50,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 88. [2023-12-02 12:50:50,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 58 states have internal predecessors, (59), 16 states have call successors, (16), 14 states have call predecessors, (16), 14 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-12-02 12:50:50,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2023-12-02 12:50:50,398 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 73 [2023-12-02 12:50:50,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:50:50,398 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2023-12-02 12:50:50,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 16 states have internal predecessors, (40), 14 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2023-12-02 12:50:50,399 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2023-12-02 12:50:50,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-12-02 12:50:50,400 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:50:50,400 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:50:50,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 12:50:50,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:50:50,601 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:50:50,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:50:50,601 INFO L85 PathProgramCache]: Analyzing trace with hash -510598493, now seen corresponding path program 2 times [2023-12-02 12:50:50,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:50:50,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670789074] [2023-12-02 12:50:50,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:50:50,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:50:50,609 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:50:50,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1891405188] [2023-12-02 12:50:50,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:50:50,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:50:50,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:50:50,610 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:50:50,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 12:50:52,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-12-02 12:50:52,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:50:52,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 12:50:52,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:50:52,262 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 24 proven. 260 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 12:50:52,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:50:52,389 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2023-12-02 12:50:52,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:50:52,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670789074] [2023-12-02 12:50:52,389 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:50:52,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891405188] [2023-12-02 12:50:52,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891405188] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:50:52,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1269156827] [2023-12-02 12:50:52,391 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-12-02 12:50:52,391 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:50:52,392 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:50:52,392 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:50:52,392 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:50:53,147 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-12-02 12:50:53,152 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 64 for LOIs [2023-12-02 12:50:53,176 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:51:09,946 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5345#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 12:51:09,946 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:51:09,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:51:09,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-12-02 12:51:09,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741387186] [2023-12-02 12:51:09,947 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:51:09,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 12:51:09,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:51:09,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 12:51:09,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=635, Unknown=3, NotChecked=0, Total=812 [2023-12-02 12:51:09,948 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 11 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2023-12-02 12:51:10,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:51:10,364 INFO L93 Difference]: Finished difference Result 204 states and 212 transitions. [2023-12-02 12:51:10,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-02 12:51:10,364 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 11 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) Word has length 86 [2023-12-02 12:51:10,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:51:10,366 INFO L225 Difference]: With dead ends: 204 [2023-12-02 12:51:10,366 INFO L226 Difference]: Without dead ends: 196 [2023-12-02 12:51:10,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=287, Invalid=1116, Unknown=3, NotChecked=0, Total=1406 [2023-12-02 12:51:10,368 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 44 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:51:10,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 99 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:51:10,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2023-12-02 12:51:10,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2023-12-02 12:51:10,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 129 states have (on average 1.0155038759689923) internal successors, (131), 130 states have internal predecessors, (131), 34 states have call successors, (34), 32 states have call predecessors, (34), 32 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-12-02 12:51:10,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2023-12-02 12:51:10,428 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 86 [2023-12-02 12:51:10,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:51:10,428 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2023-12-02 12:51:10,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 11 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2023-12-02 12:51:10,428 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2023-12-02 12:51:10,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2023-12-02 12:51:10,430 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:51:10,430 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 30, 11, 10, 10, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:51:10,436 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 12:51:10,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:51:10,631 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:51:10,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:51:10,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1184159699, now seen corresponding path program 3 times [2023-12-02 12:51:10,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:51:10,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400204323] [2023-12-02 12:51:10,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:51:10,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:51:10,647 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:51:10,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [288840338] [2023-12-02 12:51:10,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 12:51:10,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:51:10,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:51:10,648 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:51:10,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 12:51:10,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 12:51:10,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:51:10,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-02 12:51:10,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:51:11,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2092 backedges. 60 proven. 1910 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2023-12-02 12:51:11,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:51:11,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2092 backedges. 60 proven. 290 refuted. 0 times theorem prover too weak. 1742 trivial. 0 not checked. [2023-12-02 12:51:11,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:51:11,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400204323] [2023-12-02 12:51:11,563 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:51:11,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288840338] [2023-12-02 12:51:11,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288840338] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:51:11,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1089301424] [2023-12-02 12:51:11,565 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-12-02 12:51:11,565 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:51:11,565 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:51:11,566 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:51:11,566 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:51:12,283 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-12-02 12:51:12,288 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 64 for LOIs [2023-12-02 12:51:12,309 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:51:19,697 WARN L293 SmtUtils]: Spent 6.51s on a formula simplification. DAG size of input: 106 DAG size of output: 104 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:51:28,267 WARN L293 SmtUtils]: Spent 7.78s on a formula simplification. DAG size of input: 109 DAG size of output: 106 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:51:40,185 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7117#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 12:51:40,185 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:51:40,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:51:40,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2023-12-02 12:51:40,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552843624] [2023-12-02 12:51:40,186 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:51:40,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-02 12:51:40,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:51:40,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-02 12:51:40,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=1090, Unknown=2, NotChecked=0, Total=1482 [2023-12-02 12:51:40,189 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 24 states have internal predecessors, (103), 21 states have call successors, (65), 13 states have call predecessors, (65), 12 states have return successors, (64), 20 states have call predecessors, (64), 20 states have call successors, (64) [2023-12-02 12:51:41,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:51:41,081 INFO L93 Difference]: Finished difference Result 384 states and 396 transitions. [2023-12-02 12:51:41,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-12-02 12:51:41,082 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 24 states have internal predecessors, (103), 21 states have call successors, (65), 13 states have call predecessors, (65), 12 states have return successors, (64), 20 states have call predecessors, (64), 20 states have call successors, (64) Word has length 194 [2023-12-02 12:51:41,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:51:41,084 INFO L225 Difference]: With dead ends: 384 [2023-12-02 12:51:41,084 INFO L226 Difference]: Without dead ends: 376 [2023-12-02 12:51:41,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 541 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 28.6s TimeCoverageRelationStatistics Valid=819, Invalid=2485, Unknown=2, NotChecked=0, Total=3306 [2023-12-02 12:51:41,086 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 78 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:51:41,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 123 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 12:51:41,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2023-12-02 12:51:41,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 376. [2023-12-02 12:51:41,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 249 states have (on average 1.0080321285140563) internal successors, (251), 250 states have internal predecessors, (251), 64 states have call successors, (64), 62 states have call predecessors, (64), 62 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2023-12-02 12:51:41,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 378 transitions. [2023-12-02 12:51:41,185 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 378 transitions. Word has length 194 [2023-12-02 12:51:41,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:51:41,186 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 378 transitions. [2023-12-02 12:51:41,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 24 states have internal predecessors, (103), 21 states have call successors, (65), 13 states have call predecessors, (65), 12 states have return successors, (64), 20 states have call predecessors, (64), 20 states have call successors, (64) [2023-12-02 12:51:41,186 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 378 transitions. [2023-12-02 12:51:41,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2023-12-02 12:51:41,190 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:51:41,190 INFO L195 NwaCegarLoop]: trace histogram [61, 60, 60, 21, 20, 20, 20, 20, 20, 20, 20, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:51:41,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 12:51:41,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:51:41,391 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:51:41,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:51:41,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1453882147, now seen corresponding path program 4 times [2023-12-02 12:51:41,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:51:41,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515308748] [2023-12-02 12:51:41,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:51:41,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:51:41,414 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:51:41,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1759900196] [2023-12-02 12:51:41,415 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 12:51:41,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:51:41,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:51:41,416 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:51:41,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 12:51:41,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 12:51:41,795 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 12:51:41,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 12:51:42,099 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 12:51:42,100 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 12:51:42,101 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-02 12:51:42,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 12:51:42,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 12:51:42,306 INFO L445 BasicCegarLoop]: Path program histogram: [4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:51:42,309 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 12:51:42,352 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 12:51:42,354 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 12:51:42,355 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 12:51:42,356 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 12:51:42,357 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 12:51:42,358 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 12:51:42,359 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 12:51:42,360 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 12:51:42,361 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 12:51:42,362 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 12:51:42,363 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 12:51:42,365 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 12:51:42,365 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 12:51:42,366 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 12:51:42,367 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 12:51:42,368 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 12:51:42,369 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 12:51:42,369 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 12:51:42,370 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 12:51:42,371 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 12:51:42,371 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 12:51:42,405 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 12:51:42 BoogieIcfgContainer [2023-12-02 12:51:42,405 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 12:51:42,405 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 12:51:42,406 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 12:51:42,406 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 12:51:42,406 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:48:07" (3/4) ... [2023-12-02 12:51:42,407 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-12-02 12:51:42,425 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 12:51:42,426 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 12:51:42,426 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 12:51:42,427 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 12:51:42,428 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 12:51:42,429 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 12:51:42,429 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 12:51:42,430 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 12:51:42,431 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 12:51:42,431 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 12:51:42,432 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 12:51:42,433 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 12:51:42,433 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 12:51:42,434 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 12:51:42,435 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 12:51:42,435 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 12:51:42,436 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 12:51:42,436 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 12:51:42,437 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 12:51:42,437 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 12:51:42,438 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 12:51:42,529 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/witness.graphml [2023-12-02 12:51:42,530 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 12:51:42,530 INFO L158 Benchmark]: Toolchain (without parser) took 215852.62ms. Allocated memory was 138.4MB in the beginning and 209.7MB in the end (delta: 71.3MB). Free memory was 101.1MB in the beginning and 121.1MB in the end (delta: -20.0MB). Peak memory consumption was 53.7MB. Max. memory is 16.1GB. [2023-12-02 12:51:42,531 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 138.4MB. Free memory is still 106.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 12:51:42,531 INFO L158 Benchmark]: CACSL2BoogieTranslator took 219.83ms. Allocated memory is still 138.4MB. Free memory was 100.7MB in the beginning and 89.9MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-12-02 12:51:42,531 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.43ms. Allocated memory is still 138.4MB. Free memory was 89.9MB in the beginning and 88.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 12:51:42,532 INFO L158 Benchmark]: Boogie Preprocessor took 21.72ms. Allocated memory is still 138.4MB. Free memory was 88.4MB in the beginning and 86.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 12:51:42,532 INFO L158 Benchmark]: RCFGBuilder took 262.50ms. Allocated memory is still 138.4MB. Free memory was 86.9MB in the beginning and 73.9MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-12-02 12:51:42,532 INFO L158 Benchmark]: TraceAbstraction took 215191.29ms. Allocated memory was 138.4MB in the beginning and 209.7MB in the end (delta: 71.3MB). Free memory was 73.1MB in the beginning and 133.7MB in the end (delta: -60.6MB). Peak memory consumption was 13.8MB. Max. memory is 16.1GB. [2023-12-02 12:51:42,533 INFO L158 Benchmark]: Witness Printer took 124.40ms. Allocated memory is still 209.7MB. Free memory was 133.7MB in the beginning and 121.1MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-12-02 12:51:42,534 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 138.4MB. Free memory is still 106.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 219.83ms. Allocated memory is still 138.4MB. Free memory was 100.7MB in the beginning and 89.9MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.43ms. Allocated memory is still 138.4MB. Free memory was 89.9MB in the beginning and 88.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 21.72ms. Allocated memory is still 138.4MB. Free memory was 88.4MB in the beginning and 86.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 262.50ms. Allocated memory is still 138.4MB. Free memory was 86.9MB in the beginning and 73.9MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 215191.29ms. Allocated memory was 138.4MB in the beginning and 209.7MB in the end (delta: 71.3MB). Free memory was 73.1MB in the beginning and 133.7MB in the end (delta: -60.6MB). Peak memory consumption was 13.8MB. Max. memory is 16.1GB. * Witness Printer took 124.40ms. Allocated memory is still 209.7MB. Free memory was 133.7MB in the beginning and 121.1MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; [L20] long long a, b, p, q, r, s; [L21] int x, y; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) [L24] RET assume_abort_if_not(x >= 1) VAL [counter=0, x=18616, y=7105] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) [L25] RET assume_abort_if_not(y >= 1) VAL [counter=0, x=18616, y=7105] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [a=18616, b=7105, counter=0, p=1, q=0, r=0, s=1, x=18616, y=7105] [L34] EXPR counter++ VAL [a=18616, b=7105, counter=1, p=1, q=0, r=0, s=1, x=18616, y=7105] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=18616, b=7105, counter=1, p=1, q=0, r=0, s=1, x=18616, y=7105] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=18616, b=7105, counter=1, p=1, q=0, r=0, s=1, x=18616, y=7105] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=18616, b=7105, counter=1, p=1, q=0, r=0, s=1, x=18616, y=7105] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=11511, b=7105, counter=1, p=1, q=0, r=-1, s=1, x=18616, y=7105] [L34] EXPR counter++ VAL [a=11511, b=7105, counter=2, p=1, q=0, r=-1, s=1, x=18616, y=7105] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=11511, b=7105, counter=2, p=1, q=0, r=-1, s=1, x=18616, y=7105] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=11511, b=7105, counter=2, p=1, q=0, r=-1, s=1, x=18616, y=7105] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=11511, b=7105, counter=2, p=1, q=0, r=-1, s=1, x=18616, y=7105] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=4406, b=7105, counter=2, p=1, q=0, r=-2, s=1, x=18616, y=7105] [L34] EXPR counter++ VAL [a=4406, b=7105, counter=3, p=1, q=0, r=-2, s=1, x=18616, y=7105] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=3] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=4406, b=7105, counter=3, p=1, q=0, r=-2, s=1, x=18616, y=7105] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=3] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=4406, b=7105, counter=3, p=1, q=0, r=-2, s=1, x=18616, y=7105] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=3] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=4406, b=7105, counter=3, p=1, q=0, r=-2, s=1, x=18616, y=7105] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=4406, b=2699, counter=3, p=1, q=-1, r=-2, s=3, x=18616, y=7105] [L34] EXPR counter++ VAL [a=4406, b=2699, counter=4, p=1, q=-1, r=-2, s=3, x=18616, y=7105] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=4406, b=2699, counter=4, p=1, q=-1, r=-2, s=3, x=18616, y=7105] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=4406, b=2699, counter=4, p=1, q=-1, r=-2, s=3, x=18616, y=7105] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=4406, b=2699, counter=4, p=1, q=-1, r=-2, s=3, x=18616, y=7105] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=1707, b=2699, counter=4, p=2, q=-1, r=-5, s=3, x=18616, y=7105] [L34] EXPR counter++ VAL [a=1707, b=2699, counter=5, p=2, q=-1, r=-5, s=3, x=18616, y=7105] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=1707, b=2699, counter=5, p=2, q=-1, r=-5, s=3, x=18616, y=7105] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=1707, b=2699, counter=5, p=2, q=-1, r=-5, s=3, x=18616, y=7105] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=1707, b=2699, counter=5, p=2, q=-1, r=-5, s=3, x=18616, y=7105] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=1707, b=992, counter=5, p=2, q=-3, r=-5, s=8, x=18616, y=7105] [L34] EXPR counter++ VAL [a=1707, b=992, counter=6, p=2, q=-3, r=-5, s=8, x=18616, y=7105] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=6] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=1707, b=992, counter=6, p=2, q=-3, r=-5, s=8, x=18616, y=7105] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=6] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=1707, b=992, counter=6, p=2, q=-3, r=-5, s=8, x=18616, y=7105] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=6] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=1707, b=992, counter=6, p=2, q=-3, r=-5, s=8, x=18616, y=7105] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=715, b=992, counter=6, p=5, q=-3, r=-13, s=8, x=18616, y=7105] [L34] EXPR counter++ VAL [a=715, b=992, counter=7, p=5, q=-3, r=-13, s=8, x=18616, y=7105] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=7] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=715, b=992, counter=7, p=5, q=-3, r=-13, s=8, x=18616, y=7105] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=7] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=715, b=992, counter=7, p=5, q=-3, r=-13, s=8, x=18616, y=7105] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=7] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=715, b=992, counter=7, p=5, q=-3, r=-13, s=8, x=18616, y=7105] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=715, b=277, counter=7, p=5, q=-8, r=-13, s=21, x=18616, y=7105] [L34] EXPR counter++ VAL [a=715, b=277, counter=8, p=5, q=-8, r=-13, s=21, x=18616, y=7105] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=8] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=715, b=277, counter=8, p=5, q=-8, r=-13, s=21, x=18616, y=7105] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=8] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=715, b=277, counter=8, p=5, q=-8, r=-13, s=21, x=18616, y=7105] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=8] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=715, b=277, counter=8, p=5, q=-8, r=-13, s=21, x=18616, y=7105] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=438, b=277, counter=8, p=13, q=-8, r=-34, s=21, x=18616, y=7105] [L34] EXPR counter++ VAL [a=438, b=277, counter=9, p=13, q=-8, r=-34, s=21, x=18616, y=7105] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=438, b=277, counter=9, p=13, q=-8, r=-34, s=21, x=18616, y=7105] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=438, b=277, counter=9, p=13, q=-8, r=-34, s=21, x=18616, y=7105] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=438, b=277, counter=9, p=13, q=-8, r=-34, s=21, x=18616, y=7105] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=161, b=277, counter=9, p=21, q=-8, r=-55, s=21, x=18616, y=7105] [L34] EXPR counter++ VAL [a=161, b=277, counter=10, p=21, q=-8, r=-55, s=21, x=18616, y=7105] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=10] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=161, b=277, counter=10, p=21, q=-8, r=-55, s=21, x=18616, y=7105] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=10] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=161, b=277, counter=10, p=21, q=-8, r=-55, s=21, x=18616, y=7105] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=10] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=161, b=277, counter=10, p=21, q=-8, r=-55, s=21, x=18616, y=7105] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=161, b=116, counter=10, p=21, q=-29, r=-55, s=76, x=18616, y=7105] [L34] EXPR counter++ VAL [a=161, b=116, counter=11, p=21, q=-29, r=-55, s=76, x=18616, y=7105] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=11] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=11] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=161, b=116, counter=11, p=21, q=-29, r=-55, s=76, x=18616, y=7105] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=11] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=11] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=161, b=116, counter=11, p=21, q=-29, r=-55, s=76, x=18616, y=7105] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=11] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=11] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=161, b=116, counter=11, p=21, q=-29, r=-55, s=76, x=18616, y=7105] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=45, b=116, counter=11, p=50, q=-29, r=-131, s=76, x=18616, y=7105] [L34] EXPR counter++ VAL [a=45, b=116, counter=12, p=50, q=-29, r=-131, s=76, x=18616, y=7105] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=12] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=12] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=45, b=116, counter=12, p=50, q=-29, r=-131, s=76, x=18616, y=7105] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=12] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=12] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=45, b=116, counter=12, p=50, q=-29, r=-131, s=76, x=18616, y=7105] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=12] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=12] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=45, b=116, counter=12, p=50, q=-29, r=-131, s=76, x=18616, y=7105] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=45, b=71, counter=12, p=50, q=-79, r=-131, s=207, x=18616, y=7105] [L34] EXPR counter++ VAL [a=45, b=71, counter=13, p=50, q=-79, r=-131, s=207, x=18616, y=7105] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=13] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=13] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=45, b=71, counter=13, p=50, q=-79, r=-131, s=207, x=18616, y=7105] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=13] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=13] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=45, b=71, counter=13, p=50, q=-79, r=-131, s=207, x=18616, y=7105] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=13] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=13] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=45, b=71, counter=13, p=50, q=-79, r=-131, s=207, x=18616, y=7105] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=45, b=26, counter=13, p=50, q=-129, r=-131, s=338, x=18616, y=7105] [L34] EXPR counter++ VAL [a=45, b=26, counter=14, p=50, q=-129, r=-131, s=338, x=18616, y=7105] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=14] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=14] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=45, b=26, counter=14, p=50, q=-129, r=-131, s=338, x=18616, y=7105] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=14] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=14] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=45, b=26, counter=14, p=50, q=-129, r=-131, s=338, x=18616, y=7105] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=14] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=14] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=45, b=26, counter=14, p=50, q=-129, r=-131, s=338, x=18616, y=7105] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=19, b=26, counter=14, p=179, q=-129, r=-469, s=338, x=18616, y=7105] [L34] EXPR counter++ VAL [a=19, b=26, counter=15, p=179, q=-129, r=-469, s=338, x=18616, y=7105] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=15] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=15] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=19, b=26, counter=15, p=179, q=-129, r=-469, s=338, x=18616, y=7105] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=15] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=15] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=19, b=26, counter=15, p=179, q=-129, r=-469, s=338, x=18616, y=7105] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=15] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=15] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=19, b=26, counter=15, p=179, q=-129, r=-469, s=338, x=18616, y=7105] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=19, b=7, counter=15, p=179, q=-308, r=-469, s=807, x=18616, y=7105] [L34] EXPR counter++ VAL [a=19, b=7, counter=16, p=179, q=-308, r=-469, s=807, x=18616, y=7105] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=16] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=16] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=19, b=7, counter=16, p=179, q=-308, r=-469, s=807, x=18616, y=7105] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=16] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=16] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=19, b=7, counter=16, p=179, q=-308, r=-469, s=807, x=18616, y=7105] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=16] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=16] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=19, b=7, counter=16, p=179, q=-308, r=-469, s=807, x=18616, y=7105] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=12, b=7, counter=16, p=487, q=-308, r=-1276, s=807, x=18616, y=7105] [L34] EXPR counter++ VAL [a=12, b=7, counter=17, p=487, q=-308, r=-1276, s=807, x=18616, y=7105] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=17] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=17] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=12, b=7, counter=17, p=487, q=-308, r=-1276, s=807, x=18616, y=7105] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=17] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=17] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=12, b=7, counter=17, p=487, q=-308, r=-1276, s=807, x=18616, y=7105] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=17] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=17] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=12, b=7, counter=17, p=487, q=-308, r=-1276, s=807, x=18616, y=7105] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=5, b=7, counter=17, p=795, q=-308, r=-2083, s=807, x=18616, y=7105] [L34] EXPR counter++ VAL [a=5, b=7, counter=18, p=795, q=-308, r=-2083, s=807, x=18616, y=7105] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=18] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=18] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=5, b=7, counter=18, p=795, q=-308, r=-2083, s=807, x=18616, y=7105] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=18] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=18] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=5, b=7, counter=18, p=795, q=-308, r=-2083, s=807, x=18616, y=7105] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=18] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=18] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=5, b=7, counter=18, p=795, q=-308, r=-2083, s=807, x=18616, y=7105] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=5, b=2, counter=18, p=795, q=-1103, r=-2083, s=2890, x=18616, y=7105] [L34] EXPR counter++ VAL [a=5, b=2, counter=19, p=795, q=-1103, r=-2083, s=2890, x=18616, y=7105] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=19] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=19] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=5, b=2, counter=19, p=795, q=-1103, r=-2083, s=2890, x=18616, y=7105] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=19] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=19] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=5, b=2, counter=19, p=795, q=-1103, r=-2083, s=2890, x=18616, y=7105] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=19] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=19] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=5, b=2, counter=19, p=795, q=-1103, r=-2083, s=2890, x=18616, y=7105] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=3, b=2, counter=19, p=1898, q=-1103, r=-4973, s=2890, x=18616, y=7105] [L34] EXPR counter++ VAL [a=3, b=2, counter=20, p=1898, q=-1103, r=-4973, s=2890, x=18616, y=7105] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=20] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=20] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=3, b=2, counter=20, p=1898, q=-1103, r=-4973, s=2890, x=18616, y=7105] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=20] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=20] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=3, b=2, counter=20, p=1898, q=-1103, r=-4973, s=2890, x=18616, y=7105] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=20] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=20] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=3, b=2, counter=20, p=1898, q=-1103, r=-4973, s=2890, x=18616, y=7105] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=1, b=2, counter=20, p=3001, q=-1103, r=-7863, s=2890, x=18616, y=7105] [L34] EXPR counter++ VAL [a=1, b=2, counter=21, p=3001, q=-1103, r=-7863, s=2890, x=18616, y=7105] [L34] COND FALSE !(counter++<20) [L53] CALL __VERIFIER_assert(a - b == 0) VAL [\old(cond)=0, counter=21] [L11] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=21] [L13] reach_error() VAL [\old(cond)=0, cond=0, counter=21] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 215.0s, OverallIterations: 15, TraceHistogramMax: 61, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 20.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 320 SdHoareTripleChecker+Valid, 7.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 293 mSDsluCounter, 1580 SdHoareTripleChecker+Invalid, 7.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1264 mSDsCounter, 187 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1484 IncrementalHoareTripleChecker+Invalid, 1673 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 187 mSolverCounterUnsat, 316 mSDtfsCounter, 1484 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1844 GetRequests, 1526 SyntacticMatches, 9 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3148 ImplicationChecksByTransitivity, 182.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=376occurred in iteration=14, InterpolantAutomatonStates: 168, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 14 MinimizatonAttempts, 32 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 2.2s SatisfiabilityAnalysisTime, 13.7s InterpolantComputationTime, 1048 NumberOfCodeBlocks, 1025 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 1235 ConstructedInterpolants, 0 QuantifiedInterpolants, 7952 SizeOfPredicates, 59 NumberOfNonLiveVariables, 1663 ConjunctsInSsa, 238 ConjunctsInUnsatCore, 23 InterpolantComputations, 5 PerfectInterpolantSequences, 3248/5906 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 1.2s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 6, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 39, DAG_INTERPRETER_EARLY_EXITS: 2, TOOLS_POST_APPLICATIONS: 27, TOOLS_POST_TIME: 0.2s, TOOLS_POST_CALL_APPLICATIONS: 29, TOOLS_POST_CALL_TIME: 0.4s, TOOLS_POST_RETURN_APPLICATIONS: 18, TOOLS_POST_RETURN_TIME: 0.2s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 74, TOOLS_QUANTIFIERELIM_TIME: 0.8s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 102, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 33, DOMAIN_JOIN_TIME: 0.3s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 39, DOMAIN_ISBOTTOM_TIME: 0.1s, 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: 18, CALL_SUMMARIZER_CACHE_MISSES: 4, 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: 392, DAG_COMPRESSION_RETAINED_NODES: 110, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-12-02 12:51:42,751 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2023-12-02 12:51:42,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129bb950-c9c2-43cf-ba64-e3de644d05bc/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE