./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound20.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_26d803f0-9c5e-46f3-aa45-e221a26db51a/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d803f0-9c5e-46f3-aa45-e221a26db51a/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_26d803f0-9c5e-46f3-aa45-e221a26db51a/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d803f0-9c5e-46f3-aa45-e221a26db51a/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d803f0-9c5e-46f3-aa45-e221a26db51a/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_26d803f0-9c5e-46f3-aa45-e221a26db51a/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 7921702b8cbecd5225031321150d70ea7b40d7d08ee6ac9909ff47d4f7b99139 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:54:25,589 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:54:25,705 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d803f0-9c5e-46f3-aa45-e221a26db51a/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:54:25,716 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:54:25,717 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:54:25,755 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:54:25,757 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:54:25,757 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:54:25,758 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:54:25,763 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:54:25,764 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:54:25,765 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:54:25,765 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:54:25,767 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:54:25,767 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:54:25,768 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:54:25,768 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:54:25,768 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:54:25,769 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:54:25,769 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:54:25,777 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:54:25,777 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:54:25,778 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:54:25,778 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:54:25,779 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:54:25,779 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:54:25,779 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:54:25,780 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:54:25,781 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:54:25,781 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:54:25,782 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:54:25,783 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:54:25,783 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:54:25,783 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:54:25,783 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:54:25,784 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:54:25,784 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:54:25,784 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:54:25,784 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:54:25,785 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:54:25,785 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:54:25,785 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:54:25,786 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_26d803f0-9c5e-46f3-aa45-e221a26db51a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d803f0-9c5e-46f3-aa45-e221a26db51a/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7921702b8cbecd5225031321150d70ea7b40d7d08ee6ac9909ff47d4f7b99139 [2023-11-26 11:54:26,119 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:54:26,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:54:26,154 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:54:26,155 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:54:26,156 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:54:26,157 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d803f0-9c5e-46f3-aa45-e221a26db51a/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound20.c [2023-11-26 11:54:29,272 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:54:29,542 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:54:29,544 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d803f0-9c5e-46f3-aa45-e221a26db51a/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound20.c [2023-11-26 11:54:29,554 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d803f0-9c5e-46f3-aa45-e221a26db51a/bin/uautomizer-verify-VRDe98Ueme/data/1cd8f9375/58e86cb5e440443dababd71bfb8c09ab/FLAGd98a857b8 [2023-11-26 11:54:29,573 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d803f0-9c5e-46f3-aa45-e221a26db51a/bin/uautomizer-verify-VRDe98Ueme/data/1cd8f9375/58e86cb5e440443dababd71bfb8c09ab [2023-11-26 11:54:29,578 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:54:29,580 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:54:29,584 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:54:29,584 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:54:29,589 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:54:29,590 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:54:29" (1/1) ... [2023-11-26 11:54:29,591 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bb82a14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:29, skipping insertion in model container [2023-11-26 11:54:29,591 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:54:29" (1/1) ... [2023-11-26 11:54:29,617 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:54:29,827 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_26d803f0-9c5e-46f3-aa45-e221a26db51a/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound20.c[458,471] [2023-11-26 11:54:29,846 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:54:29,857 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:54:29,870 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_26d803f0-9c5e-46f3-aa45-e221a26db51a/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound20.c[458,471] [2023-11-26 11:54:29,877 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:54:29,893 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:54:29,894 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:29 WrapperNode [2023-11-26 11:54:29,894 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:54:29,895 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:54:29,895 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:54:29,896 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:54:29,904 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:29" (1/1) ... [2023-11-26 11:54:29,911 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:29" (1/1) ... [2023-11-26 11:54:29,930 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 36 [2023-11-26 11:54:29,930 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:54:29,931 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:54:29,931 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:54:29,931 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:54:29,944 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:29" (1/1) ... [2023-11-26 11:54:29,944 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:29" (1/1) ... [2023-11-26 11:54:29,945 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:29" (1/1) ... [2023-11-26 11:54:29,957 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 11:54:29,958 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:29" (1/1) ... [2023-11-26 11:54:29,958 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:29" (1/1) ... [2023-11-26 11:54:29,961 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:29" (1/1) ... [2023-11-26 11:54:29,964 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:29" (1/1) ... [2023-11-26 11:54:29,966 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:29" (1/1) ... [2023-11-26 11:54:29,966 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:29" (1/1) ... [2023-11-26 11:54:29,968 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:54:29,969 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:54:29,969 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:54:29,970 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:54:29,970 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:29" (1/1) ... [2023-11-26 11:54:29,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:54:29,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d803f0-9c5e-46f3-aa45-e221a26db51a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:54:30,015 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d803f0-9c5e-46f3-aa45-e221a26db51a/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:54:30,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d803f0-9c5e-46f3-aa45-e221a26db51a/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:54:30,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:54:30,062 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 11:54:30,062 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 11:54:30,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:54:30,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:54:30,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:54:30,062 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-26 11:54:30,064 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-26 11:54:30,130 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:54:30,132 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:54:30,281 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:54:30,306 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:54:30,306 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:54:30,307 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:54:30 BoogieIcfgContainer [2023-11-26 11:54:30,307 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:54:30,310 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:54:30,311 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:54:30,314 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:54:30,315 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:54:29" (1/3) ... [2023-11-26 11:54:30,315 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52454a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:54:30, skipping insertion in model container [2023-11-26 11:54:30,316 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:29" (2/3) ... [2023-11-26 11:54:30,316 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52454a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:54:30, skipping insertion in model container [2023-11-26 11:54:30,316 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:54:30" (3/3) ... [2023-11-26 11:54:30,325 INFO L112 eAbstractionObserver]: Analyzing ICFG ps5-ll_valuebound20.c [2023-11-26 11:54:30,343 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:54:30,343 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:54:30,398 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:54:30,405 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;@5cf60c68, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:54:30,405 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:54:30,409 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-26 11:54:30,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-26 11:54:30,416 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:54:30,418 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:54:30,419 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:54:30,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:30,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1419667615, now seen corresponding path program 1 times [2023-11-26 11:54:30,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:30,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122986712] [2023-11-26 11:54:30,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:30,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:30,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:30,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:30,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122986712] [2023-11-26 11:54:30,565 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 11:54:30,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668232623] [2023-11-26 11:54:30,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:30,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:54:30,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d803f0-9c5e-46f3-aa45-e221a26db51a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:54:30,570 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d803f0-9c5e-46f3-aa45-e221a26db51a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:54:30,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d803f0-9c5e-46f3-aa45-e221a26db51a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:54:30,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:30,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 11:54:30,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:54:30,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:54:30,716 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:54:30,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668232623] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:54:30,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:54:30,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:54:30,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988800090] [2023-11-26 11:54:30,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:54:30,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:54:30,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:30,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:54:30,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:54:30,770 INFO L87 Difference]: Start difference. First operand has 21 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 11:54:30,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:54:30,819 INFO L93 Difference]: Finished difference Result 40 states and 58 transitions. [2023-11-26 11:54:30,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:54:30,822 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 11:54:30,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:54:30,832 INFO L225 Difference]: With dead ends: 40 [2023-11-26 11:54:30,832 INFO L226 Difference]: Without dead ends: 19 [2023-11-26 11:54:30,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 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 11:54:30,841 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:54:30,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:54:30,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-26 11:54:30,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-26 11:54:30,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-26 11:54:30,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2023-11-26 11:54:30,888 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 17 [2023-11-26 11:54:30,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:54:30,888 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2023-11-26 11:54:30,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 11:54:30,889 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2023-11-26 11:54:30,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-26 11:54:30,891 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:54:30,892 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:54:30,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d803f0-9c5e-46f3-aa45-e221a26db51a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:54:31,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d803f0-9c5e-46f3-aa45-e221a26db51a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 11:54:31,098 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:54:31,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:31,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1758174245, now seen corresponding path program 1 times [2023-11-26 11:54:31,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:31,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259898494] [2023-11-26 11:54:31,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:31,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:31,119 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:54:31,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [209474841] [2023-11-26 11:54:31,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:31,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:54:31,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d803f0-9c5e-46f3-aa45-e221a26db51a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:54:31,122 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d803f0-9c5e-46f3-aa45-e221a26db51a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:54:31,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d803f0-9c5e-46f3-aa45-e221a26db51a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:54:31,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:31,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-26 11:54:31,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:54:31,332 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 11:54:31,332 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:54:31,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:31,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259898494] [2023-11-26 11:54:31,333 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:54:31,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209474841] [2023-11-26 11:54:31,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209474841] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:54:31,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:54:31,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 11:54:31,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376990788] [2023-11-26 11:54:31,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:54:31,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:54:31,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:31,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:54:31,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:54:31,339 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 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 11:54:31,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:54:31,444 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2023-11-26 11:54:31,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:54:31,445 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 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 17 [2023-11-26 11:54:31,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:54:31,446 INFO L225 Difference]: With dead ends: 30 [2023-11-26 11:54:31,447 INFO L226 Difference]: Without dead ends: 26 [2023-11-26 11:54:31,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 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 11:54:31,449 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 8 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:54:31,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 68 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:54:31,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-26 11:54:31,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-26 11:54:31,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-26 11:54:31,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2023-11-26 11:54:31,461 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2023-11-26 11:54:31,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:54:31,462 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2023-11-26 11:54:31,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 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 11:54:31,462 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2023-11-26 11:54:31,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-26 11:54:31,464 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:54:31,464 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:54:31,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d803f0-9c5e-46f3-aa45-e221a26db51a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:54:31,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d803f0-9c5e-46f3-aa45-e221a26db51a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:54:31,670 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:54:31,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:31,672 INFO L85 PathProgramCache]: Analyzing trace with hash -795669560, now seen corresponding path program 1 times [2023-11-26 11:54:31,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:31,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997787560] [2023-11-26 11:54:31,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:31,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:31,698 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:54:31,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [451590155] [2023-11-26 11:54:31,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:31,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:54:31,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d803f0-9c5e-46f3-aa45-e221a26db51a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:54:31,711 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d803f0-9c5e-46f3-aa45-e221a26db51a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:54:31,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d803f0-9c5e-46f3-aa45-e221a26db51a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:54:31,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:31,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-26 11:54:31,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:54:32,005 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:54:32,008 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:54:32,244 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:54:32,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:32,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997787560] [2023-11-26 11:54:32,245 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:54:32,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451590155] [2023-11-26 11:54:32,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451590155] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:54:32,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:54:32,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2023-11-26 11:54:32,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38697124] [2023-11-26 11:54:32,246 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:54:32,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 11:54:32,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:32,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 11:54:32,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:54:32,250 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 11:54:32,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:54:32,399 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2023-11-26 11:54:32,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:54:32,400 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 24 [2023-11-26 11:54:32,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:54:32,404 INFO L225 Difference]: With dead ends: 37 [2023-11-26 11:54:32,404 INFO L226 Difference]: Without dead ends: 33 [2023-11-26 11:54:32,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:54:32,409 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 18 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:54:32,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 91 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:54:32,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-26 11:54:32,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2023-11-26 11:54:32,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-26 11:54:32,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2023-11-26 11:54:32,438 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 24 [2023-11-26 11:54:32,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:54:32,440 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2023-11-26 11:54:32,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 11:54:32,440 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2023-11-26 11:54:32,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-26 11:54:32,442 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:54:32,442 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] [2023-11-26 11:54:32,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d803f0-9c5e-46f3-aa45-e221a26db51a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:54:32,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d803f0-9c5e-46f3-aa45-e221a26db51a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:54:32,655 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:54:32,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:32,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1266135666, now seen corresponding path program 1 times [2023-11-26 11:54:32,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:32,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970136363] [2023-11-26 11:54:32,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:32,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:32,671 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:54:32,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [77376774] [2023-11-26 11:54:32,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:32,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:54:32,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d803f0-9c5e-46f3-aa45-e221a26db51a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:54:32,679 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d803f0-9c5e-46f3-aa45-e221a26db51a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:54:32,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d803f0-9c5e-46f3-aa45-e221a26db51a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:54:32,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:32,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-26 11:54:32,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:54:32,872 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 11:54:32,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:55:22,048 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 4 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-26 11:55:30,068 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 4 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)