./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dad54faad409a509f8fe160c736fa981b1b72909c611eb2d7f09e49e6ca0dfcb --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:40:50,875 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:40:50,993 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:40:51,009 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:40:51,009 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:40:51,058 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:40:51,059 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:40:51,060 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:40:51,061 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:40:51,067 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:40:51,068 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:40:51,068 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:40:51,069 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:40:51,071 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:40:51,071 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:40:51,072 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:40:51,072 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:40:51,073 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:40:51,073 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:40:51,074 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:40:51,074 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:40:51,075 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:40:51,075 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:40:51,076 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:40:51,076 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:40:51,077 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:40:51,077 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:40:51,078 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:40:51,079 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:40:51,079 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:40:51,081 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:40:51,081 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:40:51,081 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:40:51,082 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:40:51,082 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:40:51,082 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:40:51,083 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:40:51,083 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:40:51,083 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:40:51,083 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:40:51,084 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:40:51,084 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:40:51,084 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dad54faad409a509f8fe160c736fa981b1b72909c611eb2d7f09e49e6ca0dfcb [2023-11-26 10:40:51,423 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:40:51,459 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:40:51,463 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:40:51,464 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:40:51,465 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:40:51,466 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound2.c [2023-11-26 10:40:54,864 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:40:55,126 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:40:55,127 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound2.c [2023-11-26 10:40:55,137 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/data/163c4d223/e044c19b6eab4ce0bf3180b192c38b23/FLAG8b554d783 [2023-11-26 10:40:55,156 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/data/163c4d223/e044c19b6eab4ce0bf3180b192c38b23 [2023-11-26 10:40:55,160 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:40:55,162 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:40:55,164 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:40:55,164 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:40:55,170 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:40:55,171 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:40:55" (1/1) ... [2023-11-26 10:40:55,172 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@778a19f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:40:55, skipping insertion in model container [2023-11-26 10:40:55,172 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:40:55" (1/1) ... [2023-11-26 10:40:55,201 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:40:55,460 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_f74e2698-2335-4d42-abf7-56ea837ac15a/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound2.c[489,502] [2023-11-26 10:40:55,498 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:40:55,520 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:40:55,535 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_f74e2698-2335-4d42-abf7-56ea837ac15a/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound2.c[489,502] [2023-11-26 10:40:55,544 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:40:55,562 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:40:55,563 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:40:55 WrapperNode [2023-11-26 10:40:55,563 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:40:55,565 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:40:55,565 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:40:55,565 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:40:55,575 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:40:55" (1/1) ... [2023-11-26 10:40:55,584 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:40:55" (1/1) ... [2023-11-26 10:40:55,605 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 60 [2023-11-26 10:40:55,606 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:40:55,607 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:40:55,607 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:40:55,607 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:40:55,619 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:40:55" (1/1) ... [2023-11-26 10:40:55,619 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:40:55" (1/1) ... [2023-11-26 10:40:55,621 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:40:55" (1/1) ... [2023-11-26 10:40:55,636 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 10:40:55,636 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:40:55" (1/1) ... [2023-11-26 10:40:55,637 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:40:55" (1/1) ... [2023-11-26 10:40:55,640 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:40:55" (1/1) ... [2023-11-26 10:40:55,644 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:40:55" (1/1) ... [2023-11-26 10:40:55,646 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:40:55" (1/1) ... [2023-11-26 10:40:55,653 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:40:55" (1/1) ... [2023-11-26 10:40:55,655 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:40:55,657 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:40:55,657 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:40:55,657 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:40:55,658 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:40:55" (1/1) ... [2023-11-26 10:40:55,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:40:55,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:40:55,710 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:40:55,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:40:55,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:40:55,759 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 10:40:55,759 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 10:40:55,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:40:55,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:40:55,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:40:55,760 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-26 10:40:55,760 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-26 10:40:55,833 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:40:55,836 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:40:56,032 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:40:56,085 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:40:56,085 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 10:40:56,085 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:40:56 BoogieIcfgContainer [2023-11-26 10:40:56,086 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:40:56,095 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:40:56,095 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:40:56,099 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:40:56,100 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:40:55" (1/3) ... [2023-11-26 10:40:56,102 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f8bab3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:40:56, skipping insertion in model container [2023-11-26 10:40:56,102 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:40:55" (2/3) ... [2023-11-26 10:40:56,105 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f8bab3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:40:56, skipping insertion in model container [2023-11-26 10:40:56,106 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:40:56" (3/3) ... [2023-11-26 10:40:56,107 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound2.c [2023-11-26 10:40:56,132 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:40:56,133 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:40:56,189 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:40:56,198 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=PETRI_NET, 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;@179a6765, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:40:56,198 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 10:40:56,203 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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) [2023-11-26 10:40:56,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-26 10:40:56,212 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:40:56,213 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:40:56,213 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:40:56,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:40:56,221 INFO L85 PathProgramCache]: Analyzing trace with hash 2138951705, now seen corresponding path program 1 times [2023-11-26 10:40:56,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:40:56,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925009241] [2023-11-26 10:40:56,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:40:56,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:40:56,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:40:56,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:40:56,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:40:56,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-26 10:40:56,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:40:56,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 10:40:56,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:40:56,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925009241] [2023-11-26 10:40:56,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925009241] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:40:56,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:40:56,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:40:56,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477338785] [2023-11-26 10:40:56,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:40:56,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 10:40:56,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:40:56,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 10:40:56,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:40:56,495 INFO L87 Difference]: Start difference. First operand has 27 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 10:40:56,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:40:56,533 INFO L93 Difference]: Finished difference Result 52 states and 84 transitions. [2023-11-26 10:40:56,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 10:40:56,548 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-11-26 10:40:56,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:40:56,558 INFO L225 Difference]: With dead ends: 52 [2023-11-26 10:40:56,561 INFO L226 Difference]: Without dead ends: 25 [2023-11-26 10:40:56,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:40:56,576 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:40:56,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:40:56,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-26 10:40:56,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-26 10:40:56,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 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) [2023-11-26 10:40:56,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2023-11-26 10:40:56,642 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 17 [2023-11-26 10:40:56,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:40:56,643 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2023-11-26 10:40:56,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 10:40:56,644 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2023-11-26 10:40:56,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-26 10:40:56,649 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:40:56,649 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:40:56,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:40:56,651 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:40:56,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:40:56,652 INFO L85 PathProgramCache]: Analyzing trace with hash -443127421, now seen corresponding path program 1 times [2023-11-26 10:40:56,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:40:56,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093802455] [2023-11-26 10:40:56,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:40:56,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:40:56,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:40:56,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:40:56,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:40:56,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-26 10:40:56,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:40:56,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 10:40:56,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:40:56,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093802455] [2023-11-26 10:40:56,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093802455] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:40:56,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:40:56,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:40:56,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553626029] [2023-11-26 10:40:56,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:40:56,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:40:56,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:40:56,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:40:56,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:40:56,942 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 10:40:56,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:40:56,974 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2023-11-26 10:40:56,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:40:56,975 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 18 [2023-11-26 10:40:56,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:40:56,977 INFO L225 Difference]: With dead ends: 37 [2023-11-26 10:40:56,977 INFO L226 Difference]: Without dead ends: 27 [2023-11-26 10:40:56,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:40:56,980 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 5 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:40:56,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 84 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:40:56,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-26 10:40:56,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-11-26 10:40:56,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 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) [2023-11-26 10:40:56,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2023-11-26 10:40:56,993 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 18 [2023-11-26 10:40:56,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:40:56,995 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2023-11-26 10:40:56,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 10:40:56,995 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2023-11-26 10:40:56,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-26 10:40:56,996 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:40:56,997 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:40:56,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 10:40:56,998 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:40:56,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:40:56,999 INFO L85 PathProgramCache]: Analyzing trace with hash -441459125, now seen corresponding path program 1 times [2023-11-26 10:40:56,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:40:57,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410089505] [2023-11-26 10:40:57,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:40:57,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:40:57,021 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:40:57,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [847295923] [2023-11-26 10:40:57,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:40:57,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:40:57,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:40:57,027 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:40:57,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:40:57,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:40:57,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-26 10:40:57,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:40:57,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:40:57,406 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:40:57,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:40:57,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410089505] [2023-11-26 10:40:57,407 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:40:57,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847295923] [2023-11-26 10:40:57,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847295923] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:40:57,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:40:57,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 10:40:57,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907165826] [2023-11-26 10:40:57,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:40:57,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:40:57,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:40:57,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:40:57,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:40:57,412 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 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) [2023-11-26 10:40:57,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:40:57,559 INFO L93 Difference]: Finished difference Result 44 states and 61 transitions. [2023-11-26 10:40:57,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:40:57,560 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 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 18 [2023-11-26 10:40:57,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:40:57,562 INFO L225 Difference]: With dead ends: 44 [2023-11-26 10:40:57,562 INFO L226 Difference]: Without dead ends: 42 [2023-11-26 10:40:57,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:40:57,565 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 10 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:40:57,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 165 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:40:57,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-26 10:40:57,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2023-11-26 10:40:57,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 24 states have internal predecessors, (29), 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) [2023-11-26 10:40:57,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 58 transitions. [2023-11-26 10:40:57,599 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 58 transitions. Word has length 18 [2023-11-26 10:40:57,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:40:57,599 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 58 transitions. [2023-11-26 10:40:57,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 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) [2023-11-26 10:40:57,600 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 58 transitions. [2023-11-26 10:40:57,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-26 10:40:57,601 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:40:57,602 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:40:57,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 10:40:57,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:40:57,808 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:40:57,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:40:57,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1203735897, now seen corresponding path program 1 times [2023-11-26 10:40:57,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:40:57,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995105946] [2023-11-26 10:40:57,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:40:57,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:40:57,830 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:40:57,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [207720969] [2023-11-26 10:40:57,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:40:57,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:40:57,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:40:57,833 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:40:57,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:40:57,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:40:57,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-26 10:40:57,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:40:58,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:40:58,217 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:40:58,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:40:58,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995105946] [2023-11-26 10:40:58,521 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:40:58,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207720969] [2023-11-26 10:40:58,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207720969] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:40:58,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:40:58,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-11-26 10:40:58,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785130281] [2023-11-26 10:40:58,523 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-26 10:40:58,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 10:40:58,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:40:58,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 10:40:58,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:40:58,525 INFO L87 Difference]: Start difference. First operand 41 states and 58 transitions. Second operand has 11 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 10:40:58,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:40:58,820 INFO L93 Difference]: Finished difference Result 48 states and 64 transitions. [2023-11-26 10:40:58,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 10:40:58,821 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2023-11-26 10:40:58,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:40:58,823 INFO L225 Difference]: With dead ends: 48 [2023-11-26 10:40:58,823 INFO L226 Difference]: Without dead ends: 46 [2023-11-26 10:40:58,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-11-26 10:40:58,825 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 26 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:40:58,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 132 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:40:58,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-26 10:40:58,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2023-11-26 10:40:58,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 25 states have (on average 1.28) internal successors, (32), 27 states have internal predecessors, (32), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-26 10:40:58,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2023-11-26 10:40:58,840 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 23 [2023-11-26 10:40:58,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:40:58,841 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2023-11-26 10:40:58,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 10:40:58,842 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2023-11-26 10:40:58,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-26 10:40:58,843 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:40:58,843 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:40:58,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:40:59,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:40:59,048 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:40:59,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:40:59,049 INFO L85 PathProgramCache]: Analyzing trace with hash 705122187, now seen corresponding path program 1 times [2023-11-26 10:40:59,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:40:59,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245461818] [2023-11-26 10:40:59,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:40:59,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:40:59,069 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:40:59,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [739893292] [2023-11-26 10:40:59,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:40:59,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:40:59,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:40:59,087 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:40:59,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:40:59,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:40:59,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-26 10:40:59,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:40:59,257 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 10:40:59,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:40:59,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:40:59,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245461818] [2023-11-26 10:40:59,313 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:40:59,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739893292] [2023-11-26 10:40:59,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739893292] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:40:59,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:40:59,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-11-26 10:40:59,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802572873] [2023-11-26 10:40:59,314 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-26 10:40:59,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:40:59,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:40:59,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:40:59,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:40:59,316 INFO L87 Difference]: Start difference. First operand 45 states and 61 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 10:40:59,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:40:59,471 INFO L93 Difference]: Finished difference Result 70 states and 102 transitions. [2023-11-26 10:40:59,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:40:59,471 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2023-11-26 10:40:59,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:40:59,476 INFO L225 Difference]: With dead ends: 70 [2023-11-26 10:40:59,478 INFO L226 Difference]: Without dead ends: 66 [2023-11-26 10:40:59,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-26 10:40:59,480 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:40:59,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 87 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:40:59,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-26 10:40:59,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2023-11-26 10:40:59,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 38 states have internal predecessors, (46), 26 states have call successors, (26), 5 states have call predecessors, (26), 5 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-26 10:40:59,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 95 transitions. [2023-11-26 10:40:59,520 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 95 transitions. Word has length 28 [2023-11-26 10:40:59,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:40:59,521 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 95 transitions. [2023-11-26 10:40:59,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 10:40:59,521 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 95 transitions. [2023-11-26 10:40:59,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-26 10:40:59,523 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:40:59,523 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:40:59,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:40:59,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:40:59,729 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:40:59,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:40:59,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1795283768, now seen corresponding path program 1 times [2023-11-26 10:40:59,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:40:59,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498438483] [2023-11-26 10:40:59,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:40:59,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:40:59,741 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:40:59,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [474468153] [2023-11-26 10:40:59,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:40:59,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:40:59,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:40:59,760 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:40:59,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:40:59,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:40:59,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 10:40:59,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:40:59,867 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-26 10:40:59,867 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:40:59,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:40:59,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498438483] [2023-11-26 10:40:59,868 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:40:59,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474468153] [2023-11-26 10:40:59,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474468153] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:40:59,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:40:59,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:40:59,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689575528] [2023-11-26 10:40:59,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:40:59,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:40:59,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:40:59,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:40:59,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:40:59,870 INFO L87 Difference]: Start difference. First operand 66 states and 95 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2023-11-26 10:40:59,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:40:59,940 INFO L93 Difference]: Finished difference Result 82 states and 118 transitions. [2023-11-26 10:40:59,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:40:59,940 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 34 [2023-11-26 10:40:59,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:40:59,942 INFO L225 Difference]: With dead ends: 82 [2023-11-26 10:40:59,942 INFO L226 Difference]: Without dead ends: 80 [2023-11-26 10:40:59,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:40:59,944 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:40:59,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 127 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:40:59,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-11-26 10:40:59,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2023-11-26 10:40:59,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 44 states have internal predecessors, (49), 29 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (26), 22 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-26 10:40:59,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 104 transitions. [2023-11-26 10:40:59,972 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 104 transitions. Word has length 34 [2023-11-26 10:40:59,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:40:59,972 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 104 transitions. [2023-11-26 10:40:59,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2023-11-26 10:40:59,973 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 104 transitions. [2023-11-26 10:40:59,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-26 10:40:59,974 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:40:59,974 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, 1, 1, 1, 1, 1] [2023-11-26 10:40:59,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:41:00,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:00,175 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:41:00,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:00,176 INFO L85 PathProgramCache]: Analyzing trace with hash -427827123, now seen corresponding path program 1 times [2023-11-26 10:41:00,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:00,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760689198] [2023-11-26 10:41:00,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:00,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:00,188 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:41:00,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [535456460] [2023-11-26 10:41:00,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:00,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:00,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:41:00,190 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:41:00,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:41:00,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:00,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 10:41:00,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:41:00,332 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-26 10:41:00,332 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:41:00,390 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-26 10:41:00,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:00,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760689198] [2023-11-26 10:41:00,391 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:41:00,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535456460] [2023-11-26 10:41:00,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535456460] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:41:00,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:41:00,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2023-11-26 10:41:00,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856769049] [2023-11-26 10:41:00,393 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:41:00,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:41:00,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:00,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:41:00,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:41:00,396 INFO L87 Difference]: Start difference. First operand 73 states and 104 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-26 10:41:00,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:41:00,468 INFO L93 Difference]: Finished difference Result 116 states and 147 transitions. [2023-11-26 10:41:00,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:41:00,469 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 37 [2023-11-26 10:41:00,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:41:00,473 INFO L225 Difference]: With dead ends: 116 [2023-11-26 10:41:00,474 INFO L226 Difference]: Without dead ends: 97 [2023-11-26 10:41:00,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:41:00,476 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 7 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:41:00,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 97 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:41:00,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-26 10:41:00,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2023-11-26 10:41:00,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 61 states have internal predecessors, (67), 29 states have call successors, (29), 11 states have call predecessors, (29), 10 states have return successors, (26), 22 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-26 10:41:00,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 122 transitions. [2023-11-26 10:41:00,513 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 122 transitions. Word has length 37 [2023-11-26 10:41:00,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:41:00,513 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 122 transitions. [2023-11-26 10:41:00,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-26 10:41:00,514 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 122 transitions. [2023-11-26 10:41:00,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-26 10:41:00,521 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:00,522 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:00,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 10:41:00,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:00,730 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:41:00,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:00,730 INFO L85 PathProgramCache]: Analyzing trace with hash -426158827, now seen corresponding path program 1 times [2023-11-26 10:41:00,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:00,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893371792] [2023-11-26 10:41:00,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:00,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:00,747 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:41:00,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1616400203] [2023-11-26 10:41:00,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:00,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:00,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:41:00,752 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:41:00,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 10:41:00,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:00,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-26 10:41:00,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:41:00,954 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-26 10:41:00,955 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:41:01,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:01,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893371792] [2023-11-26 10:41:01,102 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:41:01,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616400203] [2023-11-26 10:41:01,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616400203] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:41:01,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:41:01,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-11-26 10:41:01,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409196653] [2023-11-26 10:41:01,103 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-26 10:41:01,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:41:01,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:01,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:41:01,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:41:01,105 INFO L87 Difference]: Start difference. First operand 95 states and 122 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-26 10:41:01,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:41:01,238 INFO L93 Difference]: Finished difference Result 101 states and 127 transitions. [2023-11-26 10:41:01,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:41:01,238 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2023-11-26 10:41:01,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:41:01,242 INFO L225 Difference]: With dead ends: 101 [2023-11-26 10:41:01,242 INFO L226 Difference]: Without dead ends: 98 [2023-11-26 10:41:01,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-26 10:41:01,246 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:41:01,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 107 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:41:01,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-11-26 10:41:01,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2023-11-26 10:41:01,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 58 states have (on average 1.206896551724138) internal successors, (70), 64 states have internal predecessors, (70), 28 states have call successors, (28), 12 states have call predecessors, (28), 11 states have return successors, (25), 21 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-26 10:41:01,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 123 transitions. [2023-11-26 10:41:01,276 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 123 transitions. Word has length 37 [2023-11-26 10:41:01,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:41:01,276 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 123 transitions. [2023-11-26 10:41:01,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-26 10:41:01,277 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 123 transitions. [2023-11-26 10:41:01,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-26 10:41:01,278 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:01,278 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:01,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-26 10:41:01,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:01,485 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:41:01,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:01,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1298990710, now seen corresponding path program 1 times [2023-11-26 10:41:01,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:01,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005334422] [2023-11-26 10:41:01,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:01,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:01,496 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:41:01,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1763725510] [2023-11-26 10:41:01,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:01,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:01,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:41:01,498 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:41:01,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 10:41:01,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:01,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-26 10:41:01,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:41:01,665 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-26 10:41:01,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:41:01,831 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-26 10:41:01,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:01,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005334422] [2023-11-26 10:41:01,832 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:41:01,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763725510] [2023-11-26 10:41:01,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763725510] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:41:01,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:41:01,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2023-11-26 10:41:01,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055409510] [2023-11-26 10:41:01,833 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:41:01,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 10:41:01,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:01,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 10:41:01,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-11-26 10:41:01,835 INFO L87 Difference]: Start difference. First operand 98 states and 123 transitions. Second operand has 12 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-26 10:41:02,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:41:02,042 INFO L93 Difference]: Finished difference Result 113 states and 143 transitions. [2023-11-26 10:41:02,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:41:02,043 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 39 [2023-11-26 10:41:02,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:41:02,044 INFO L225 Difference]: With dead ends: 113 [2023-11-26 10:41:02,044 INFO L226 Difference]: Without dead ends: 101 [2023-11-26 10:41:02,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:41:02,046 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 16 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:41:02,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 168 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:41:02,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-11-26 10:41:02,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2023-11-26 10:41:02,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 65 states have internal predecessors, (69), 29 states have call successors, (29), 11 states have call predecessors, (29), 11 states have return successors, (27), 22 states have call predecessors, (27), 27 states have call successors, (27) [2023-11-26 10:41:02,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 125 transitions. [2023-11-26 10:41:02,069 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 125 transitions. Word has length 39 [2023-11-26 10:41:02,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:41:02,069 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 125 transitions. [2023-11-26 10:41:02,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-26 10:41:02,070 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 125 transitions. [2023-11-26 10:41:02,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-26 10:41:02,071 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:02,071 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:02,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 10:41:02,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:02,278 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:41:02,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:02,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1786533347, now seen corresponding path program 2 times [2023-11-26 10:41:02,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:02,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063818046] [2023-11-26 10:41:02,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:02,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:02,289 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:41:02,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1933539907] [2023-11-26 10:41:02,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:41:02,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:02,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:41:02,291 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:41:02,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 10:41:02,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:41:02,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:41:02,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-26 10:41:02,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:41:02,601 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-26 10:41:02,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:41:02,826 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-26 10:41:02,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:02,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063818046] [2023-11-26 10:41:02,827 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:41:02,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933539907] [2023-11-26 10:41:02,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933539907] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:41:02,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:41:02,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-11-26 10:41:02,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935100633] [2023-11-26 10:41:02,828 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:41:02,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-26 10:41:02,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:02,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-26 10:41:02,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-11-26 10:41:02,830 INFO L87 Difference]: Start difference. First operand 99 states and 125 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 5 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2023-11-26 10:41:03,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:41:03,413 INFO L93 Difference]: Finished difference Result 126 states and 164 transitions. [2023-11-26 10:41:03,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:41:03,414 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 5 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 42 [2023-11-26 10:41:03,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:41:03,415 INFO L225 Difference]: With dead ends: 126 [2023-11-26 10:41:03,416 INFO L226 Difference]: Without dead ends: 119 [2023-11-26 10:41:03,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-11-26 10:41:03,417 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 38 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 10:41:03,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 98 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 10:41:03,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-11-26 10:41:03,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 103. [2023-11-26 10:41:03,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 64 states have (on average 1.15625) internal successors, (74), 70 states have internal predecessors, (74), 25 states have call successors, (25), 13 states have call predecessors, (25), 13 states have return successors, (22), 19 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-26 10:41:03,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 121 transitions. [2023-11-26 10:41:03,451 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 121 transitions. Word has length 42 [2023-11-26 10:41:03,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:41:03,451 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 121 transitions. [2023-11-26 10:41:03,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 5 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2023-11-26 10:41:03,451 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 121 transitions. [2023-11-26 10:41:03,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-26 10:41:03,452 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:03,453 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:03,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 10:41:03,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:03,659 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:41:03,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:03,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1635373379, now seen corresponding path program 2 times [2023-11-26 10:41:03,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:03,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894062319] [2023-11-26 10:41:03,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:03,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:03,669 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:41:03,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [859262920] [2023-11-26 10:41:03,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:41:03,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:03,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:41:03,671 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:41:03,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 10:41:03,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:41:03,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2023-11-26 10:41:03,742 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-26 10:41:03,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 10:41:03,790 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-26 10:41:03,790 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-26 10:41:03,792 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-26 10:41:03,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 10:41:04,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:04,003 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:04,007 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-26 10:41:04,028 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-26 10:41:04,032 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-26 10:41:04,034 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-26 10:41:04,049 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 10:41:04 BoogieIcfgContainer [2023-11-26 10:41:04,049 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-26 10:41:04,049 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-26 10:41:04,049 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-26 10:41:04,049 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-26 10:41:04,050 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:40:56" (3/4) ... [2023-11-26 10:41:04,051 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-26 10:41:04,059 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-26 10:41:04,061 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-26 10:41:04,063 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-26 10:41:04,131 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/witness.graphml [2023-11-26 10:41:04,132 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-26 10:41:04,133 INFO L158 Benchmark]: Toolchain (without parser) took 8970.80ms. Allocated memory was 157.3MB in the beginning and 188.7MB in the end (delta: 31.5MB). Free memory was 121.3MB in the beginning and 122.1MB in the end (delta: -821.5kB). Peak memory consumption was 31.0MB. Max. memory is 16.1GB. [2023-11-26 10:41:04,133 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 121.6MB. Free memory is still 90.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-26 10:41:04,133 INFO L158 Benchmark]: CACSL2BoogieTranslator took 399.74ms. Allocated memory is still 157.3MB. Free memory was 121.3MB in the beginning and 124.4MB in the end (delta: -3.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-26 10:41:04,134 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.48ms. Allocated memory is still 157.3MB. Free memory was 124.4MB in the beginning and 122.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-26 10:41:04,134 INFO L158 Benchmark]: Boogie Preprocessor took 48.88ms. Allocated memory is still 157.3MB. Free memory was 122.7MB in the beginning and 120.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-26 10:41:04,134 INFO L158 Benchmark]: RCFGBuilder took 429.32ms. Allocated memory is still 157.3MB. Free memory was 120.7MB in the beginning and 109.0MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-26 10:41:04,135 INFO L158 Benchmark]: TraceAbstraction took 7953.86ms. Allocated memory was 157.3MB in the beginning and 188.7MB in the end (delta: 31.5MB). Free memory was 108.2MB in the beginning and 125.3MB in the end (delta: -17.1MB). Peak memory consumption was 15.9MB. Max. memory is 16.1GB. [2023-11-26 10:41:04,135 INFO L158 Benchmark]: Witness Printer took 82.51ms. Allocated memory is still 188.7MB. Free memory was 125.3MB in the beginning and 122.1MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-26 10:41:04,137 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 121.6MB. Free memory is still 90.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 399.74ms. Allocated memory is still 157.3MB. Free memory was 121.3MB in the beginning and 124.4MB in the end (delta: -3.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.48ms. Allocated memory is still 157.3MB. Free memory was 124.4MB in the beginning and 122.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 48.88ms. Allocated memory is still 157.3MB. Free memory was 122.7MB in the beginning and 120.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 429.32ms. Allocated memory is still 157.3MB. Free memory was 120.7MB in the beginning and 109.0MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 7953.86ms. Allocated memory was 157.3MB in the beginning and 188.7MB in the end (delta: 31.5MB). Free memory was 108.2MB in the beginning and 125.3MB in the end (delta: -17.1MB). Peak memory consumption was 15.9MB. Max. memory is 16.1GB. * Witness Printer took 82.51ms. Allocated memory is still 188.7MB. Free memory was 125.3MB in the beginning and 122.1MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. 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 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 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) VAL [\old(cond)=1, cond=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [counter=0, x=4, y=1] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [counter=0, x=4, y=1] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [a=4, b=1, counter=0, p=1, q=0, r=0, s=1, x=4, y=1] [L34] EXPR counter++ VAL [a=4, b=1, counter=1, p=1, q=0, r=0, s=1, x=4, y=1] [L34] COND TRUE counter++<2 [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=4, b=1, counter=1, p=1, q=0, r=0, s=1, x=4, y=1] [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=4, b=1, counter=1, p=1, q=0, r=0, s=1, x=4, y=1] [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=4, b=1, counter=1, p=1, q=0, r=0, s=1, x=4, y=1] [L39] COND FALSE !(!(a != b)) VAL [a=4, b=1, counter=1, p=1, q=0, r=0, s=1, x=4, y=1] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=3, b=1, counter=1, p=1, q=0, r=-1, s=1, x=4, y=1] [L34] EXPR counter++ VAL [a=3, b=1, counter=2, p=1, q=0, r=-1, s=1, x=4, y=1] [L34] COND TRUE counter++<2 [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=3, b=1, counter=2, p=1, q=0, r=-1, s=1, x=4, y=1] [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=3, b=1, counter=2, p=1, q=0, r=-1, s=1, x=4, y=1] [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=3, b=1, counter=2, p=1, q=0, r=-1, s=1, x=4, y=1] [L39] COND FALSE !(!(a != b)) VAL [a=3, b=1, counter=2, p=1, q=0, r=-1, s=1, x=4, y=1] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=2, b=1, counter=2, p=1, q=0, r=-2, s=1, x=4, y=1] [L34] EXPR counter++ VAL [a=2, b=1, counter=3, p=1, q=0, r=-2, s=1, x=4, y=1] [L34] COND FALSE !(counter++<2) [L53] CALL __VERIFIER_assert(a - b == 0) VAL [\old(cond)=0, counter=3] [L11] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=3] [L13] reach_error() VAL [\old(cond)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.8s, OverallIterations: 11, TraceHistogramMax: 7, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 165 SdHoareTripleChecker+Valid, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 134 mSDsluCounter, 1099 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 819 mSDsCounter, 72 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 717 IncrementalHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 72 mSolverCounterUnsat, 280 mSDtfsCounter, 717 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 416 GetRequests, 335 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=103occurred in iteration=10, InterpolantAutomatonStates: 67, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 10 MinimizatonAttempts, 29 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 349 NumberOfCodeBlocks, 349 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 398 ConstructedInterpolants, 0 QuantifiedInterpolants, 1323 SizeOfPredicates, 26 NumberOfNonLiveVariables, 791 ConjunctsInSsa, 136 ConjunctsInUnsatCore, 13 InterpolantComputations, 4 PerfectInterpolantSequences, 245/277 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: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-11-26 10:41:04,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e2698-2335-4d42-abf7-56ea837ac15a/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (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