./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/geo3-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a 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_14eda875-e8ff-4d58-9643-7cdde62ee4c8/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14eda875-e8ff-4d58-9643-7cdde62ee4c8/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14eda875-e8ff-4d58-9643-7cdde62ee4c8/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14eda875-e8ff-4d58-9643-7cdde62ee4c8/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/geo3-ll_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14eda875-e8ff-4d58-9643-7cdde62ee4c8/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14eda875-e8ff-4d58-9643-7cdde62ee4c8/bin/uautomizer-verify-4GaUIPS5ZU --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 a4125f633efe01ed52ee22c33d3f9d531ac7ff6ac035f88f190008d4d4fb1af8 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:18:12,527 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:18:12,629 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14eda875-e8ff-4d58-9643-7cdde62ee4c8/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 22:18:12,639 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:18:12,640 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:18:12,676 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:18:12,677 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:18:12,678 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:18:12,679 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:18:12,680 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:18:12,681 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:18:12,682 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:18:12,683 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:18:12,684 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:18:12,686 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:18:12,686 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:18:12,687 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 22:18:12,687 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:18:12,688 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:18:12,688 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:18:12,692 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:18:12,693 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 22:18:12,693 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:18:12,693 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 22:18:12,694 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:18:12,694 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:18:12,694 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 22:18:12,695 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:18:12,695 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:18:12,695 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:18:12,696 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:18:12,696 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:18:12,697 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:18:12,697 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:18:12,698 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:18:12,698 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 22:18:12,698 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:18:12,699 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:18:12,699 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:18:12,700 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:18:12,700 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:18:12,701 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:18:12,702 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_14eda875-e8ff-4d58-9643-7cdde62ee4c8/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14eda875-e8ff-4d58-9643-7cdde62ee4c8/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4125f633efe01ed52ee22c33d3f9d531ac7ff6ac035f88f190008d4d4fb1af8 [2024-10-31 22:18:12,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:18:13,019 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:18:13,024 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:18:13,026 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:18:13,026 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:18:13,027 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14eda875-e8ff-4d58-9643-7cdde62ee4c8/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/nla-digbench-scaling/geo3-ll_unwindbound10.c Unable to find full path for "g++" [2024-10-31 22:18:15,028 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:18:15,335 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:18:15,337 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14eda875-e8ff-4d58-9643-7cdde62ee4c8/sv-benchmarks/c/nla-digbench-scaling/geo3-ll_unwindbound10.c [2024-10-31 22:18:15,348 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14eda875-e8ff-4d58-9643-7cdde62ee4c8/bin/uautomizer-verify-4GaUIPS5ZU/data/d3e004fda/da85b26e544240079ae6b9aec4034394/FLAGf2e89e759 [2024-10-31 22:18:15,633 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14eda875-e8ff-4d58-9643-7cdde62ee4c8/bin/uautomizer-verify-4GaUIPS5ZU/data/d3e004fda/da85b26e544240079ae6b9aec4034394 [2024-10-31 22:18:15,636 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:18:15,638 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:18:15,640 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:18:15,640 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:18:15,647 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:18:15,649 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:18:15" (1/1) ... [2024-10-31 22:18:15,652 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@599de870 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:18:15, skipping insertion in model container [2024-10-31 22:18:15,652 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:18:15" (1/1) ... [2024-10-31 22:18:15,687 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:18:15,936 WARN L251 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_14eda875-e8ff-4d58-9643-7cdde62ee4c8/sv-benchmarks/c/nla-digbench-scaling/geo3-ll_unwindbound10.c[525,538] [2024-10-31 22:18:15,961 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:18:15,972 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:18:15,987 WARN L251 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_14eda875-e8ff-4d58-9643-7cdde62ee4c8/sv-benchmarks/c/nla-digbench-scaling/geo3-ll_unwindbound10.c[525,538] [2024-10-31 22:18:15,995 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:18:16,015 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:18:16,015 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:18:16 WrapperNode [2024-10-31 22:18:16,015 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:18:16,017 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:18:16,017 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:18:16,017 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:18:16,023 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:18:16" (1/1) ... [2024-10-31 22:18:16,028 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:18:16" (1/1) ... [2024-10-31 22:18:16,044 INFO L138 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 50 [2024-10-31 22:18:16,045 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:18:16,045 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:18:16,045 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:18:16,046 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:18:16,057 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:18:16" (1/1) ... [2024-10-31 22:18:16,057 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:18:16" (1/1) ... [2024-10-31 22:18:16,059 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:18:16" (1/1) ... [2024-10-31 22:18:16,070 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]. [2024-10-31 22:18:16,070 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:18:16" (1/1) ... [2024-10-31 22:18:16,071 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:18:16" (1/1) ... [2024-10-31 22:18:16,073 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:18:16" (1/1) ... [2024-10-31 22:18:16,076 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:18:16" (1/1) ... [2024-10-31 22:18:16,077 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:18:16" (1/1) ... [2024-10-31 22:18:16,078 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:18:16" (1/1) ... [2024-10-31 22:18:16,080 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:18:16,081 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:18:16,081 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:18:16,081 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:18:16,082 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:18:16" (1/1) ... [2024-10-31 22:18:16,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:18:16,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14eda875-e8ff-4d58-9643-7cdde62ee4c8/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:18:16,108 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14eda875-e8ff-4d58-9643-7cdde62ee4c8/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:18:16,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14eda875-e8ff-4d58-9643-7cdde62ee4c8/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:18:16,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:18:16,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:18:16,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:18:16,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:18:16,137 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-31 22:18:16,138 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-31 22:18:16,204 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:18:16,207 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:18:16,382 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-10-31 22:18:16,382 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:18:16,394 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:18:16,394 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-31 22:18:16,395 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:18:16 BoogieIcfgContainer [2024-10-31 22:18:16,395 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:18:16,397 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:18:16,397 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:18:16,400 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:18:16,400 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:18:15" (1/3) ... [2024-10-31 22:18:16,401 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1285008d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:18:16, skipping insertion in model container [2024-10-31 22:18:16,401 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:18:16" (2/3) ... [2024-10-31 22:18:16,402 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1285008d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:18:16, skipping insertion in model container [2024-10-31 22:18:16,402 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:18:16" (3/3) ... [2024-10-31 22:18:16,403 INFO L112 eAbstractionObserver]: Analyzing ICFG geo3-ll_unwindbound10.c [2024-10-31 22:18:16,420 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:18:16,420 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 22:18:16,484 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:18:16,492 INFO L333 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, 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;@d0bc461, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:18:16,492 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 22:18:16,498 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:18:16,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-31 22:18:16,507 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:18:16,507 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:18:16,508 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:18:16,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:18:16,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1819757606, now seen corresponding path program 1 times [2024-10-31 22:18:16,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:18:16,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529233540] [2024-10-31 22:18:16,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:18:16,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:18:16,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:16,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:18:16,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:18:16,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529233540] [2024-10-31 22:18:16,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529233540] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:18:16,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:18:16,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:18:16,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763171996] [2024-10-31 22:18:16,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:18:16,734 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-31 22:18:16,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:18:16,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-31 22:18:16,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 22:18:16,761 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:18:16,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:18:16,781 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2024-10-31 22:18:16,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-31 22:18:16,782 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-10-31 22:18:16,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:18:16,790 INFO L225 Difference]: With dead ends: 32 [2024-10-31 22:18:16,790 INFO L226 Difference]: Without dead ends: 13 [2024-10-31 22:18:16,793 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 22:18:16,797 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:18:16,798 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:18:16,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-10-31 22:18:16,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-10-31 22:18:16,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-31 22:18:16,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2024-10-31 22:18:16,834 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2024-10-31 22:18:16,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:18:16,834 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2024-10-31 22:18:16,835 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:18:16,835 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2024-10-31 22:18:16,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-31 22:18:16,836 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:18:16,836 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:18:16,836 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:18:16,837 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:18:16,837 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:18:16,837 INFO L85 PathProgramCache]: Analyzing trace with hash 178410715, now seen corresponding path program 1 times [2024-10-31 22:18:16,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:18:16,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046149449] [2024-10-31 22:18:16,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:18:16,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:18:16,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:16,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:18:16,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:18:16,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046149449] [2024-10-31 22:18:16,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046149449] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:18:16,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:18:16,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:18:16,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626691525] [2024-10-31 22:18:16,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:18:16,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:18:16,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:18:16,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:18:16,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:18:16,965 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:18:16,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:18:16,989 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2024-10-31 22:18:16,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:18:16,991 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-31 22:18:16,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:18:16,992 INFO L225 Difference]: With dead ends: 22 [2024-10-31 22:18:16,992 INFO L226 Difference]: Without dead ends: 15 [2024-10-31 22:18:16,993 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:18:16,994 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:18:16,999 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:18:17,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-10-31 22:18:17,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-10-31 22:18:17,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-31 22:18:17,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2024-10-31 22:18:17,009 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 8 [2024-10-31 22:18:17,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:18:17,010 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2024-10-31 22:18:17,010 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:18:17,010 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2024-10-31 22:18:17,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-31 22:18:17,013 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:18:17,014 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:18:17,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:18:17,018 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:18:17,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:18:17,019 INFO L85 PathProgramCache]: Analyzing trace with hash 180198175, now seen corresponding path program 1 times [2024-10-31 22:18:17,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:18:17,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091105148] [2024-10-31 22:18:17,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:18:17,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:18:17,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 22:18:17,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [179097247] [2024-10-31 22:18:17,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:18:17,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:18:17,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14eda875-e8ff-4d58-9643-7cdde62ee4c8/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:18:17,077 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14eda875-e8ff-4d58-9643-7cdde62ee4c8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:18:17,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14eda875-e8ff-4d58-9643-7cdde62ee4c8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:18:17,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:17,217 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-31 22:18:17,233 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:18:17,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:18:17,516 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:18:17,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:18:17,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091105148] [2024-10-31 22:18:17,517 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 22:18:17,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179097247] [2024-10-31 22:18:17,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179097247] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:18:17,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:18:17,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:18:17,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464690576] [2024-10-31 22:18:17,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:18:17,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:18:17,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:18:17,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:18:17,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:18:17,521 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:18:17,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:18:17,580 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2024-10-31 22:18:17,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:18:17,581 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-31 22:18:17,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:18:17,582 INFO L225 Difference]: With dead ends: 24 [2024-10-31 22:18:17,582 INFO L226 Difference]: Without dead ends: 21 [2024-10-31 22:18:17,583 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:18:17,584 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 4 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:18:17,585 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 42 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:18:17,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-10-31 22:18:17,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-10-31 22:18:17,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:18:17,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2024-10-31 22:18:17,594 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 8 [2024-10-31 22:18:17,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:18:17,594 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2024-10-31 22:18:17,595 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:18:17,595 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2024-10-31 22:18:17,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-31 22:18:17,596 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:18:17,596 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:18:17,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14eda875-e8ff-4d58-9643-7cdde62ee4c8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-31 22:18:17,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14eda875-e8ff-4d58-9643-7cdde62ee4c8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:18:17,800 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:18:17,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:18:17,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1542398814, now seen corresponding path program 1 times [2024-10-31 22:18:17,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:18:17,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069405145] [2024-10-31 22:18:17,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:18:17,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:18:17,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:17,956 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-31 22:18:17,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:17,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:18:17,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:18:17,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069405145] [2024-10-31 22:18:17,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069405145] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:18:17,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466130495] [2024-10-31 22:18:17,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:18:17,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:18:17,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14eda875-e8ff-4d58-9643-7cdde62ee4c8/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:18:17,973 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14eda875-e8ff-4d58-9643-7cdde62ee4c8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:18:17,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14eda875-e8ff-4d58-9643-7cdde62ee4c8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:18:18,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:18,049 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 22:18:18,050 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:18:18,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:18:18,098 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:18:18,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:18:18,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466130495] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:18:18,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:18:18,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 8 [2024-10-31 22:18:18,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686010573] [2024-10-31 22:18:18,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:18:18,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 22:18:18,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:18:18,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 22:18:18,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:18:18,183 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-31 22:18:18,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:18:18,296 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2024-10-31 22:18:18,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 22:18:18,297 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 16 [2024-10-31 22:18:18,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:18:18,298 INFO L225 Difference]: With dead ends: 52 [2024-10-31 22:18:18,299 INFO L226 Difference]: Without dead ends: 45 [2024-10-31 22:18:18,300 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:18:18,301 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 19 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:18:18,301 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 66 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:18:18,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-10-31 22:18:18,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2024-10-31 22:18:18,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 32 states have internal predecessors, (36), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-31 22:18:18,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2024-10-31 22:18:18,318 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 16 [2024-10-31 22:18:18,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:18:18,318 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2024-10-31 22:18:18,319 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-31 22:18:18,319 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2024-10-31 22:18:18,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-31 22:18:18,320 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:18:18,320 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:18:18,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14eda875-e8ff-4d58-9643-7cdde62ee4c8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 22:18:18,524 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14eda875-e8ff-4d58-9643-7cdde62ee4c8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:18:18,525 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:18:18,525 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:18:18,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1540611354, now seen corresponding path program 1 times [2024-10-31 22:18:18,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:18:18,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108866870] [2024-10-31 22:18:18,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:18:18,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:18:18,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 22:18:18,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [269477931] [2024-10-31 22:18:18,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:18:18,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:18:18,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14eda875-e8ff-4d58-9643-7cdde62ee4c8/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:18:18,599 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14eda875-e8ff-4d58-9643-7cdde62ee4c8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:18:18,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14eda875-e8ff-4d58-9643-7cdde62ee4c8/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:18:18,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:18,774 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-31 22:18:18,804 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:18:19,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:18:19,249 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:18:30,063 WARN L286 SmtUtils]: Spent 6.09s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-10-31 22:18:38,091 WARN L873 $PredicateComparison]: unable to prove that (or (= (mod (+ (* 18446744073709551615 |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~z~0#1|) (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~z~0#1| |c_ULTIMATE.start_main_~z~0#1|) (* |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~z~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 18446744073709551615 |c_ULTIMATE.start_main_~z~0#1| |c_ULTIMATE.start_main_~az~0#1|)) 18446744073709551616) 0) (not (= (mod (+ (* 18446744073709551615 |c_ULTIMATE.start_main_~x~0#1|) |c_ULTIMATE.start_main_~a~0#1| (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~z~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 18446744073709551615 |c_ULTIMATE.start_main_~az~0#1|)) 18446744073709551616) 0))) is different from true [2024-10-31 22:18:55,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2024-10-31 22:18:55,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:18:55,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108866870] [2024-10-31 22:18:55,722 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 22:18:55,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269477931] [2024-10-31 22:18:55,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269477931] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:18:55,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:18:55,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2024-10-31 22:18:55,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044964316] [2024-10-31 22:18:55,723 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 22:18:55,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-31 22:18:55,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:18:55,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-31 22:18:55,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=83, Unknown=2, NotChecked=18, Total=132 [2024-10-31 22:18:55,725 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)