./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_geo2-ll.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_645a484d-9e66-4c57-8402-4db04e501a3c/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_645a484d-9e66-4c57-8402-4db04e501a3c/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_645a484d-9e66-4c57-8402-4db04e501a3c/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_645a484d-9e66-4c57-8402-4db04e501a3c/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_geo2-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_645a484d-9e66-4c57-8402-4db04e501a3c/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_645a484d-9e66-4c57-8402-4db04e501a3c/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 50e0d41004ce88a8f3ef708f136426d09103c1930174c9041afa0700d3101d58 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:04:44,708 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:04:44,791 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_645a484d-9e66-4c57-8402-4db04e501a3c/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 22:04:44,796 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:04:44,796 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:04:44,835 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:04:44,836 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:04:44,837 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:04:44,838 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:04:44,839 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:04:44,840 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:04:44,840 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:04:44,841 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:04:44,842 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:04:44,842 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:04:44,842 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:04:44,843 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 22:04:44,843 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:04:44,843 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:04:44,844 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:04:44,844 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:04:44,850 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 22:04:44,851 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:04:44,852 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 22:04:44,852 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:04:44,852 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:04:44,853 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 22:04:44,853 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:04:44,853 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:04:44,854 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:04:44,854 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:04:44,855 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:04:44,856 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:04:44,856 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:04:44,857 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:04:44,857 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 22:04:44,857 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:04:44,857 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:04:44,858 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:04:44,858 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:04:44,858 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:04:44,859 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:04:44,859 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_645a484d-9e66-4c57-8402-4db04e501a3c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_645a484d-9e66-4c57-8402-4db04e501a3c/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 50e0d41004ce88a8f3ef708f136426d09103c1930174c9041afa0700d3101d58 [2024-10-31 22:04:45,120 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:04:45,149 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:04:45,155 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:04:45,156 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:04:45,157 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:04:45,158 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_645a484d-9e66-4c57-8402-4db04e501a3c/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/recursified_nla-digbench/recursified_geo2-ll.c Unable to find full path for "g++" [2024-10-31 22:04:47,462 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:04:47,665 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:04:47,666 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_645a484d-9e66-4c57-8402-4db04e501a3c/sv-benchmarks/c/recursified_nla-digbench/recursified_geo2-ll.c [2024-10-31 22:04:47,673 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_645a484d-9e66-4c57-8402-4db04e501a3c/bin/uautomizer-verify-4GaUIPS5ZU/data/b4b4b3faf/561061e17ac94766b50d06b9b39448a7/FLAGef2ca3c60 [2024-10-31 22:04:47,686 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_645a484d-9e66-4c57-8402-4db04e501a3c/bin/uautomizer-verify-4GaUIPS5ZU/data/b4b4b3faf/561061e17ac94766b50d06b9b39448a7 [2024-10-31 22:04:47,689 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:04:47,690 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:04:47,692 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:04:47,692 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:04:47,701 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:04:47,701 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:04:47" (1/1) ... [2024-10-31 22:04:47,703 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fcd355d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:04:47, skipping insertion in model container [2024-10-31 22:04:47,703 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:04:47" (1/1) ... [2024-10-31 22:04:47,726 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:04:47,918 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_645a484d-9e66-4c57-8402-4db04e501a3c/sv-benchmarks/c/recursified_nla-digbench/recursified_geo2-ll.c[1055,1068] [2024-10-31 22:04:47,935 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:04:47,946 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:04:47,959 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_645a484d-9e66-4c57-8402-4db04e501a3c/sv-benchmarks/c/recursified_nla-digbench/recursified_geo2-ll.c[1055,1068] [2024-10-31 22:04:47,968 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:04:47,986 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:04:47,986 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:04:47 WrapperNode [2024-10-31 22:04:47,987 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:04:47,988 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:04:47,989 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:04:47,989 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:04:47,997 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:04:47" (1/1) ... [2024-10-31 22:04:48,005 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:04:47" (1/1) ... [2024-10-31 22:04:48,023 INFO L138 Inliner]: procedures = 16, calls = 51, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 59 [2024-10-31 22:04:48,023 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:04:48,024 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:04:48,024 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:04:48,025 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:04:48,035 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:04:47" (1/1) ... [2024-10-31 22:04:48,036 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:04:47" (1/1) ... [2024-10-31 22:04:48,038 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:04:47" (1/1) ... [2024-10-31 22:04:48,053 INFO L175 MemorySlicer]: Split 27 memory accesses to 6 slices as follows [2, 7, 2, 5, 7, 4]. 26 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 8 writes are split as follows [0, 2, 1, 2, 1, 2]. [2024-10-31 22:04:48,053 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:04:47" (1/1) ... [2024-10-31 22:04:48,054 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:04:47" (1/1) ... [2024-10-31 22:04:48,060 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:04:47" (1/1) ... [2024-10-31 22:04:48,062 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:04:47" (1/1) ... [2024-10-31 22:04:48,064 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:04:47" (1/1) ... [2024-10-31 22:04:48,065 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:04:47" (1/1) ... [2024-10-31 22:04:48,067 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:04:48,068 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:04:48,069 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:04:48,069 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:04:48,070 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:04:47" (1/1) ... [2024-10-31 22:04:48,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:04:48,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_645a484d-9e66-4c57-8402-4db04e501a3c/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:04:48,102 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_645a484d-9e66-4c57-8402-4db04e501a3c/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:04:48,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_645a484d-9e66-4c57-8402-4db04e501a3c/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:04:48,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:04:48,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:04:48,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:04:48,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-31 22:04:48,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-31 22:04:48,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-31 22:04:48,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-10-31 22:04:48,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-31 22:04:48,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:04:48,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:04:48,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-31 22:04:48,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-31 22:04:48,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-31 22:04:48,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-10-31 22:04:48,144 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_30_to_38_0 [2024-10-31 22:04:48,144 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_30_to_38_0 [2024-10-31 22:04:48,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:04:48,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:04:48,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:04:48,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:04:48,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-31 22:04:48,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-31 22:04:48,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-31 22:04:48,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-10-31 22:04:48,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-31 22:04:48,148 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-31 22:04:48,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-31 22:04:48,268 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:04:48,271 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:04:48,527 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-10-31 22:04:48,527 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:04:48,541 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:04:48,542 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-31 22:04:48,542 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:04:48 BoogieIcfgContainer [2024-10-31 22:04:48,542 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:04:48,548 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:04:48,548 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:04:48,552 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:04:48,553 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:04:47" (1/3) ... [2024-10-31 22:04:48,554 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@594bb412 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:04:48, skipping insertion in model container [2024-10-31 22:04:48,554 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:04:47" (2/3) ... [2024-10-31 22:04:48,555 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@594bb412 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:04:48, skipping insertion in model container [2024-10-31 22:04:48,555 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:04:48" (3/3) ... [2024-10-31 22:04:48,557 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_geo2-ll.c [2024-10-31 22:04:48,576 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:04:48,577 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 22:04:48,650 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:04:48,658 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;@2a657f58, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:04:48,658 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 22:04:48,663 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 17 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-31 22:04:48,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-31 22:04:48,672 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:04:48,673 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:04:48,674 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:04:48,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:04:48,683 INFO L85 PathProgramCache]: Analyzing trace with hash -831245217, now seen corresponding path program 1 times [2024-10-31 22:04:48,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:04:48,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294280046] [2024-10-31 22:04:48,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:04:48,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:04:48,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 22:04:48,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1124741418] [2024-10-31 22:04:48,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:04:48,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:04:48,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_645a484d-9e66-4c57-8402-4db04e501a3c/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:04:48,993 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_645a484d-9e66-4c57-8402-4db04e501a3c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:04:48,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_645a484d-9e66-4c57-8402-4db04e501a3c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:04:49,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:49,221 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-10-31 22:04:49,238 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:04:49,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-31 22:04:49,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-31 22:04:49,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-31 22:04:49,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-31 22:04:49,605 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 22:04:49,606 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:04:49,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:04:49,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294280046] [2024-10-31 22:04:49,607 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 22:04:49,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124741418] [2024-10-31 22:04:49,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124741418] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:04:49,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:04:49,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-31 22:04:49,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419189823] [2024-10-31 22:04:49,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:04:49,618 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 22:04:49,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:04:49,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 22:04:49,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:04:49,648 INFO L87 Difference]: Start difference. First operand has 23 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 17 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:04:49,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:04:49,890 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2024-10-31 22:04:49,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:04:49,893 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-10-31 22:04:49,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:04:49,901 INFO L225 Difference]: With dead ends: 55 [2024-10-31 22:04:49,901 INFO L226 Difference]: Without dead ends: 31 [2024-10-31 22:04:49,905 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:04:49,908 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 12 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:04:49,909 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 107 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:04:49,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-10-31 22:04:49,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2024-10-31 22:04:49,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-10-31 22:04:49,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2024-10-31 22:04:49,964 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 9 [2024-10-31 22:04:49,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:04:49,965 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2024-10-31 22:04:49,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:04:49,966 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2024-10-31 22:04:49,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-31 22:04:49,967 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:04:49,968 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:04:49,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_645a484d-9e66-4c57-8402-4db04e501a3c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-31 22:04:50,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_645a484d-9e66-4c57-8402-4db04e501a3c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-10-31 22:04:50,173 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:04:50,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:04:50,175 INFO L85 PathProgramCache]: Analyzing trace with hash -958977162, now seen corresponding path program 1 times [2024-10-31 22:04:50,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:04:50,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171518521] [2024-10-31 22:04:50,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:04:50,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:04:50,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 22:04:50,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [717948746] [2024-10-31 22:04:50,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:04:50,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:04:50,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_645a484d-9e66-4c57-8402-4db04e501a3c/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:04:50,326 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_645a484d-9e66-4c57-8402-4db04e501a3c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:04:50,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_645a484d-9e66-4c57-8402-4db04e501a3c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:04:50,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:50,617 INFO L255 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-10-31 22:04:50,633 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:04:50,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-31 22:04:50,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-31 22:04:50,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-31 22:04:50,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-10-31 22:04:50,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-10-31 22:04:51,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2024-10-31 22:04:51,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-31 22:04:51,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2024-10-31 22:04:51,206 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:04:51,206 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:05:00,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:05:00,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:05:00,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171518521] [2024-10-31 22:05:00,540 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 22:05:00,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717948746] [2024-10-31 22:05:00,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717948746] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:05:00,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:05:00,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2024-10-31 22:05:00,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839402731] [2024-10-31 22:05:00,543 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 22:05:00,544 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-31 22:05:00,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:05:00,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-31 22:05:00,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=226, Unknown=2, NotChecked=0, Total=272 [2024-10-31 22:05:00,547 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 17 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 8 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:05:08,761 WARN L286 SmtUtils]: Spent 5.38s on a formula simplification that was a NOOP. DAG size: 32 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-10-31 22:05:21,939 WARN L286 SmtUtils]: Spent 8.15s on a formula simplification that was a NOOP. DAG size: 32 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)