./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/max40-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/max40-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a8d5806586012290ae42296af495175d1f0a3275a3232981eda33ec55888f6d2 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:44:50,444 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:44:50,560 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:44:50,570 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:44:50,572 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:44:50,611 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:44:50,617 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:44:50,618 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:44:50,620 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:44:50,625 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:44:50,626 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:44:50,627 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:44:50,628 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:44:50,630 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:44:50,631 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:44:50,632 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:44:50,632 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:44:50,633 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:44:50,633 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:44:50,634 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:44:50,635 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:44:50,635 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:44:50,636 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:44:50,636 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:44:50,637 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:44:50,638 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:44:50,638 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:44:50,639 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:44:50,640 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:44:50,640 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:44:50,642 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:44:50,642 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:44:50,643 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:44:50,643 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:44:50,644 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:44:50,644 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:44:50,644 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:44:50,645 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:44:50,645 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:44:50,645 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:44:50,646 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:44:50,646 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:44:50,647 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_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8d5806586012290ae42296af495175d1f0a3275a3232981eda33ec55888f6d2 [2023-11-26 10:44:50,958 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:44:51,000 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:44:51,003 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:44:51,004 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:44:51,005 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:44:51,006 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/reducercommutativity/max40-1.i [2023-11-26 10:44:54,247 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:44:54,502 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:44:54,503 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/sv-benchmarks/c/reducercommutativity/max40-1.i [2023-11-26 10:44:54,512 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/data/ac9c382fd/601d707ee79a4e15bf8fce96e9a051dd/FLAG2a57b51d8 [2023-11-26 10:44:54,532 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/data/ac9c382fd/601d707ee79a4e15bf8fce96e9a051dd [2023-11-26 10:44:54,537 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:44:54,540 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:44:54,545 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:44:54,545 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:44:54,550 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:44:54,551 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:44:54" (1/1) ... [2023-11-26 10:44:54,552 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2546baff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:54, skipping insertion in model container [2023-11-26 10:44:54,552 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:44:54" (1/1) ... [2023-11-26 10:44:54,580 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:44:54,796 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/sv-benchmarks/c/reducercommutativity/max40-1.i[1290,1303] [2023-11-26 10:44:54,811 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:44:54,820 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:44:54,856 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/sv-benchmarks/c/reducercommutativity/max40-1.i[1290,1303] [2023-11-26 10:44:54,857 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:44:54,881 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:44:54,882 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:54 WrapperNode [2023-11-26 10:44:54,882 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:44:54,883 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:44:54,883 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:44:54,884 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:44:54,891 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:54" (1/1) ... [2023-11-26 10:44:54,899 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:54" (1/1) ... [2023-11-26 10:44:54,919 INFO L138 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2023-11-26 10:44:54,920 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:44:54,921 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:44:54,921 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:44:54,921 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:44:54,931 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:54" (1/1) ... [2023-11-26 10:44:54,932 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:54" (1/1) ... [2023-11-26 10:44:54,934 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:54" (1/1) ... [2023-11-26 10:44:54,951 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 5 writes are split as follows [0, 5]. [2023-11-26 10:44:54,952 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:54" (1/1) ... [2023-11-26 10:44:54,952 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:54" (1/1) ... [2023-11-26 10:44:54,958 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:54" (1/1) ... [2023-11-26 10:44:54,962 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:54" (1/1) ... [2023-11-26 10:44:54,963 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:54" (1/1) ... [2023-11-26 10:44:54,966 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:54" (1/1) ... [2023-11-26 10:44:54,974 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:44:54,988 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:44:54,988 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:44:54,989 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:44:54,990 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:54" (1/1) ... [2023-11-26 10:44:54,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:44:55,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:55,020 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:44:55,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:44:55,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:44:55,057 INFO L130 BoogieDeclarations]: Found specification of procedure max [2023-11-26 10:44:55,057 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2023-11-26 10:44:55,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:44:55,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 10:44:55,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 10:44:55,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 10:44:55,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 10:44:55,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:44:55,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:44:55,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 10:44:55,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 10:44:55,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 10:44:55,142 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:44:55,145 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:44:55,352 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:44:55,400 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:44:55,400 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-26 10:44:55,401 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:44:55 BoogieIcfgContainer [2023-11-26 10:44:55,401 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:44:55,403 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:44:55,403 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:44:55,407 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:44:55,407 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:44:54" (1/3) ... [2023-11-26 10:44:55,408 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66416759 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:44:55, skipping insertion in model container [2023-11-26 10:44:55,408 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:54" (2/3) ... [2023-11-26 10:44:55,408 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66416759 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:44:55, skipping insertion in model container [2023-11-26 10:44:55,408 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:44:55" (3/3) ... [2023-11-26 10:44:55,410 INFO L112 eAbstractionObserver]: Analyzing ICFG max40-1.i [2023-11-26 10:44:55,429 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:44:55,429 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:44:55,480 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:44:55,487 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3bb3c814, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:44:55,488 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 10:44:55,494 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:44:55,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-26 10:44:55,504 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:44:55,505 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:44:55,507 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:44:55,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:55,516 INFO L85 PathProgramCache]: Analyzing trace with hash 548279552, now seen corresponding path program 1 times [2023-11-26 10:44:55,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:55,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380862794] [2023-11-26 10:44:55,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:55,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:55,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:55,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:44:55,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:55,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-26 10:44:55,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:55,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-26 10:44:55,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:55,898 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 10:44:55,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:55,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380862794] [2023-11-26 10:44:55,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380862794] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:55,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:55,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:44:55,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164722244] [2023-11-26 10:44:55,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:55,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 10:44:55,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:55,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 10:44:55,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:44:55,941 INFO L87 Difference]: Start difference. First operand has 22 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-26 10:44:55,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:44:56,000 INFO L93 Difference]: Finished difference Result 42 states and 61 transitions. [2023-11-26 10:44:56,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 10:44:56,003 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2023-11-26 10:44:56,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:44:56,010 INFO L225 Difference]: With dead ends: 42 [2023-11-26 10:44:56,010 INFO L226 Difference]: Without dead ends: 20 [2023-11-26 10:44:56,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:44:56,017 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:44:56,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:44:56,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-26 10:44:56,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-26 10:44:56,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:44:56,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2023-11-26 10:44:56,054 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 25 [2023-11-26 10:44:56,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:44:56,054 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2023-11-26 10:44:56,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-26 10:44:56,055 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2023-11-26 10:44:56,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-26 10:44:56,056 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:44:56,057 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:44:56,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:44:56,057 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:44:56,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:56,058 INFO L85 PathProgramCache]: Analyzing trace with hash -419783731, now seen corresponding path program 1 times [2023-11-26 10:44:56,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:56,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436615265] [2023-11-26 10:44:56,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:56,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:56,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:56,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:44:56,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:56,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-26 10:44:56,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:56,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-26 10:44:56,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:56,210 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 10:44:56,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:56,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436615265] [2023-11-26 10:44:56,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436615265] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:44:56,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91953118] [2023-11-26 10:44:56,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:56,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:56,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:56,224 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:56,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:44:56,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:56,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 10:44:56,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:56,372 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 10:44:56,372 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:44:56,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91953118] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:56,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:44:56,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-26 10:44:56,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139795506] [2023-11-26 10:44:56,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:56,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:44:56,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:56,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:44:56,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:44:56,376 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-26 10:44:56,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:44:56,397 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2023-11-26 10:44:56,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:44:56,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2023-11-26 10:44:56,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:44:56,399 INFO L225 Difference]: With dead ends: 39 [2023-11-26 10:44:56,399 INFO L226 Difference]: Without dead ends: 21 [2023-11-26 10:44:56,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:44:56,401 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:44:56,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:44:56,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-26 10:44:56,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-26 10:44:56,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:44:56,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2023-11-26 10:44:56,408 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 25 [2023-11-26 10:44:56,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:44:56,409 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2023-11-26 10:44:56,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-26 10:44:56,409 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2023-11-26 10:44:56,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-26 10:44:56,410 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:44:56,410 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:44:56,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 10:44:56,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:56,617 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:44:56,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:56,617 INFO L85 PathProgramCache]: Analyzing trace with hash 836676700, now seen corresponding path program 1 times [2023-11-26 10:44:56,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:56,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178403423] [2023-11-26 10:44:56,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:56,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:56,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:56,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-26 10:44:56,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:56,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 10:44:56,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:56,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-11-26 10:44:56,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:56,822 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 10:44:56,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:56,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178403423] [2023-11-26 10:44:56,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178403423] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:44:56,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837403379] [2023-11-26 10:44:56,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:56,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:56,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:56,825 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:56,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:44:56,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:56,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 10:44:56,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:56,962 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 10:44:56,962 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:44:56,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837403379] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:56,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:44:56,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-11-26 10:44:56,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395761722] [2023-11-26 10:44:56,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:56,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:44:56,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:56,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:44:56,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:44:56,965 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 10:44:56,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:44:56,991 INFO L93 Difference]: Finished difference Result 40 states and 53 transitions. [2023-11-26 10:44:56,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:44:56,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2023-11-26 10:44:56,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:44:56,993 INFO L225 Difference]: With dead ends: 40 [2023-11-26 10:44:56,993 INFO L226 Difference]: Without dead ends: 24 [2023-11-26 10:44:56,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:44:56,995 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:44:56,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 34 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:44:56,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-26 10:44:57,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2023-11-26 10:44:57,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:44:57,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2023-11-26 10:44:57,002 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 26 [2023-11-26 10:44:57,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:44:57,003 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2023-11-26 10:44:57,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 10:44:57,003 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2023-11-26 10:44:57,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-26 10:44:57,005 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:44:57,005 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:44:57,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-26 10:44:57,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:57,211 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:44:57,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:57,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1099478403, now seen corresponding path program 1 times [2023-11-26 10:44:57,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:57,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254274068] [2023-11-26 10:44:57,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:57,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:57,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:57,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-26 10:44:57,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:57,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-26 10:44:57,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:57,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-26 10:44:57,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:57,416 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-26 10:44:57,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:57,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254274068] [2023-11-26 10:44:57,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254274068] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:44:57,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318959170] [2023-11-26 10:44:57,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:57,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:57,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:57,418 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:57,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:44:57,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:57,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 10:44:57,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:57,579 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-26 10:44:57,580 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:44:57,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318959170] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:57,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:44:57,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-26 10:44:57,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144379998] [2023-11-26 10:44:57,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:57,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:44:57,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:57,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:44:57,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:44:57,583 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 10:44:57,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:44:57,618 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2023-11-26 10:44:57,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:44:57,620 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2023-11-26 10:44:57,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:44:57,623 INFO L225 Difference]: With dead ends: 36 [2023-11-26 10:44:57,623 INFO L226 Difference]: Without dead ends: 23 [2023-11-26 10:44:57,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:44:57,629 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:44:57,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:44:57,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-26 10:44:57,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-26 10:44:57,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:44:57,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2023-11-26 10:44:57,641 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 35 [2023-11-26 10:44:57,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:44:57,642 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2023-11-26 10:44:57,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 10:44:57,643 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2023-11-26 10:44:57,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-26 10:44:57,648 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:44:57,649 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:44:57,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:44:57,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:57,856 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:44:57,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:57,857 INFO L85 PathProgramCache]: Analyzing trace with hash -189935555, now seen corresponding path program 1 times [2023-11-26 10:44:57,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:57,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273442126] [2023-11-26 10:44:57,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:57,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:57,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:57,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-26 10:44:57,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:57,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-26 10:44:57,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:58,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-26 10:44:58,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:58,040 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-26 10:44:58,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:58,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273442126] [2023-11-26 10:44:58,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273442126] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:44:58,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587643091] [2023-11-26 10:44:58,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:58,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:58,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:58,043 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:58,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:44:58,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:58,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 10:44:58,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:58,186 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-26 10:44:58,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:44:58,236 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-26 10:44:58,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587643091] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:44:58,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:44:58,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 4] total 9 [2023-11-26 10:44:58,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244739416] [2023-11-26 10:44:58,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:44:58,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:44:58,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:58,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:44:58,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:44:58,243 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-26 10:44:58,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:44:58,313 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2023-11-26 10:44:58,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 10:44:58,314 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 36 [2023-11-26 10:44:58,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:44:58,316 INFO L225 Difference]: With dead ends: 51 [2023-11-26 10:44:58,316 INFO L226 Difference]: Without dead ends: 31 [2023-11-26 10:44:58,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:44:58,318 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 5 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:44:58,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 51 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:44:58,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-26 10:44:58,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-11-26 10:44:58,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:44:58,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2023-11-26 10:44:58,330 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 36 [2023-11-26 10:44:58,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:44:58,330 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2023-11-26 10:44:58,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-26 10:44:58,331 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2023-11-26 10:44:58,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-26 10:44:58,333 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:44:58,334 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:44:58,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-26 10:44:58,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:58,540 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:44:58,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:58,541 INFO L85 PathProgramCache]: Analyzing trace with hash -822209617, now seen corresponding path program 2 times [2023-11-26 10:44:58,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:58,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341444380] [2023-11-26 10:44:58,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:58,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:58,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:58,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 10:44:58,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:58,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-26 10:44:58,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:58,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-26 10:44:58,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:58,695 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-11-26 10:44:58,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:58,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341444380] [2023-11-26 10:44:58,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341444380] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:44:58,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541275593] [2023-11-26 10:44:58,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:44:58,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:58,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:58,698 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:58,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:44:58,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:44:58,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:44:58,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:44:58,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:58,892 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-26 10:44:58,892 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:44:58,996 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-26 10:44:58,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541275593] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:44:58,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:44:58,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2023-11-26 10:44:58,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704388762] [2023-11-26 10:44:58,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:44:58,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 10:44:58,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:59,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 10:44:59,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:44:59,002 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-26 10:44:59,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:44:59,068 INFO L93 Difference]: Finished difference Result 59 states and 77 transitions. [2023-11-26 10:44:59,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 10:44:59,069 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 48 [2023-11-26 10:44:59,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:44:59,070 INFO L225 Difference]: With dead ends: 59 [2023-11-26 10:44:59,071 INFO L226 Difference]: Without dead ends: 36 [2023-11-26 10:44:59,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:44:59,075 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:44:59,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:44:59,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-26 10:44:59,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-11-26 10:44:59,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:44:59,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2023-11-26 10:44:59,083 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 48 [2023-11-26 10:44:59,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:44:59,084 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2023-11-26 10:44:59,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-26 10:44:59,085 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2023-11-26 10:44:59,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-26 10:44:59,086 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:44:59,086 INFO L195 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:44:59,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-26 10:44:59,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:59,293 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:44:59,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:59,293 INFO L85 PathProgramCache]: Analyzing trace with hash -987209395, now seen corresponding path program 3 times [2023-11-26 10:44:59,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:59,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611018524] [2023-11-26 10:44:59,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:59,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:59,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:59,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-26 10:44:59,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:59,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-26 10:44:59,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:59,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-26 10:44:59,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:59,765 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-26 10:44:59,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:59,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611018524] [2023-11-26 10:44:59,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611018524] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:44:59,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105275411] [2023-11-26 10:44:59,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 10:44:59,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:59,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:59,768 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:59,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 10:44:59,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-26 10:44:59,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:44:59,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 10:44:59,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:59,930 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 40 proven. 3 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-26 10:44:59,930 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:44:59,987 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2023-11-26 10:44:59,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105275411] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:44:59,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:44:59,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2023-11-26 10:44:59,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446031679] [2023-11-26 10:44:59,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:44:59,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-26 10:44:59,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:59,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-26 10:44:59,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-11-26 10:44:59,993 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-26 10:45:00,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:00,063 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2023-11-26 10:45:00,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-26 10:45:00,064 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 55 [2023-11-26 10:45:00,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:00,064 INFO L225 Difference]: With dead ends: 65 [2023-11-26 10:45:00,065 INFO L226 Difference]: Without dead ends: 41 [2023-11-26 10:45:00,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-11-26 10:45:00,066 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:00,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 144 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:45:00,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-26 10:45:00,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-11-26 10:45:00,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:45:00,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2023-11-26 10:45:00,073 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 55 [2023-11-26 10:45:00,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:00,073 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2023-11-26 10:45:00,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-26 10:45:00,073 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2023-11-26 10:45:00,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-26 10:45:00,074 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:00,075 INFO L195 NwaCegarLoop]: trace histogram [11, 6, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:00,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:00,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:00,281 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:45:00,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:00,281 INFO L85 PathProgramCache]: Analyzing trace with hash 819371676, now seen corresponding path program 4 times [2023-11-26 10:45:00,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:00,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825306868] [2023-11-26 10:45:00,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:00,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:00,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:00,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-26 10:45:00,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:00,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-26 10:45:00,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:00,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-26 10:45:00,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:00,728 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-11-26 10:45:00,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:00,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825306868] [2023-11-26 10:45:00,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825306868] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:00,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791718384] [2023-11-26 10:45:00,729 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 10:45:00,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:00,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:00,733 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:00,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 10:45:00,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 10:45:00,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:45:00,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 10:45:00,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:00,939 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 57 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-26 10:45:00,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:01,020 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 19 proven. 24 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2023-11-26 10:45:01,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791718384] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:01,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:45:01,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2023-11-26 10:45:01,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391878796] [2023-11-26 10:45:01,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:01,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-26 10:45:01,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:01,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-26 10:45:01,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2023-11-26 10:45:01,024 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-26 10:45:01,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:01,115 INFO L93 Difference]: Finished difference Result 82 states and 105 transitions. [2023-11-26 10:45:01,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-26 10:45:01,116 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 60 [2023-11-26 10:45:01,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:01,117 INFO L225 Difference]: With dead ends: 82 [2023-11-26 10:45:01,117 INFO L226 Difference]: Without dead ends: 54 [2023-11-26 10:45:01,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2023-11-26 10:45:01,118 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 19 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:01,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 86 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:45:01,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-26 10:45:01,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-11-26 10:45:01,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:45:01,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2023-11-26 10:45:01,127 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 60 [2023-11-26 10:45:01,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:01,127 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2023-11-26 10:45:01,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-26 10:45:01,128 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2023-11-26 10:45:01,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-26 10:45:01,129 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:01,129 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 12, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:01,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:01,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-26 10:45:01,341 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:45:01,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:01,341 INFO L85 PathProgramCache]: Analyzing trace with hash 822741869, now seen corresponding path program 5 times [2023-11-26 10:45:01,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:01,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182492058] [2023-11-26 10:45:01,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:01,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:01,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:01,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-26 10:45:01,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:01,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-26 10:45:01,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:01,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-11-26 10:45:01,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:01,893 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2023-11-26 10:45:01,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:01,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182492058] [2023-11-26 10:45:01,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182492058] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:01,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106786875] [2023-11-26 10:45:01,895 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 10:45:01,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:01,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:01,896 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:01,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 10:45:02,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-11-26 10:45:02,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:45:02,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 10:45:02,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:03,071 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 244 proven. 51 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2023-11-26 10:45:03,071 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:03,272 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2023-11-26 10:45:03,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106786875] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:03,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:45:03,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2023-11-26 10:45:03,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216385537] [2023-11-26 10:45:03,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:03,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-26 10:45:03,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:03,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-26 10:45:03,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2023-11-26 10:45:03,276 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 states have internal predecessors, (79), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-26 10:45:03,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:03,399 INFO L93 Difference]: Finished difference Result 119 states and 158 transitions. [2023-11-26 10:45:03,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-26 10:45:03,400 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 states have internal predecessors, (79), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 97 [2023-11-26 10:45:03,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:03,401 INFO L225 Difference]: With dead ends: 119 [2023-11-26 10:45:03,401 INFO L226 Difference]: Without dead ends: 79 [2023-11-26 10:45:03,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2023-11-26 10:45:03,403 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 43 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:03,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 124 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:45:03,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-26 10:45:03,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2023-11-26 10:45:03,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 74 states have internal predecessors, (91), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:45:03,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 97 transitions. [2023-11-26 10:45:03,412 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 97 transitions. Word has length 97 [2023-11-26 10:45:03,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:03,413 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 97 transitions. [2023-11-26 10:45:03,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 states have internal predecessors, (79), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-26 10:45:03,413 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 97 transitions. [2023-11-26 10:45:03,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-11-26 10:45:03,415 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:03,416 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 13, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:03,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:03,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:03,624 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:45:03,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:03,625 INFO L85 PathProgramCache]: Analyzing trace with hash -335114884, now seen corresponding path program 6 times [2023-11-26 10:45:03,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:03,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702902451] [2023-11-26 10:45:03,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:03,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:03,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:04,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-26 10:45:04,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:04,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-11-26 10:45:04,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:04,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2023-11-26 10:45:04,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:04,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2833 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 2742 trivial. 0 not checked. [2023-11-26 10:45:04,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:04,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702902451] [2023-11-26 10:45:04,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702902451] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:04,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007392191] [2023-11-26 10:45:04,335 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-26 10:45:04,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:04,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:04,339 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:04,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 10:45:04,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-11-26 10:45:04,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:45:04,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 10:45:04,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:05,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2833 backedges. 1240 proven. 21 refuted. 0 times theorem prover too weak. 1572 trivial. 0 not checked. [2023-11-26 10:45:05,033 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:05,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2833 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2023-11-26 10:45:05,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007392191] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:05,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:45:05,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2023-11-26 10:45:05,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541916467] [2023-11-26 10:45:05,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:05,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-26 10:45:05,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:05,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-26 10:45:05,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2023-11-26 10:45:05,230 INFO L87 Difference]: Start difference. First operand 79 states and 97 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-26 10:45:05,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:05,311 INFO L93 Difference]: Finished difference Result 152 states and 196 transitions. [2023-11-26 10:45:05,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-26 10:45:05,311 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 170 [2023-11-26 10:45:05,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:05,313 INFO L225 Difference]: With dead ends: 152 [2023-11-26 10:45:05,313 INFO L226 Difference]: Without dead ends: 88 [2023-11-26 10:45:05,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2023-11-26 10:45:05,317 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:05,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 126 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:45:05,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-26 10:45:05,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-11-26 10:45:05,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.2048192771084338) internal successors, (100), 83 states have internal predecessors, (100), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:45:05,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 106 transitions. [2023-11-26 10:45:05,333 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 106 transitions. Word has length 170 [2023-11-26 10:45:05,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:05,334 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 106 transitions. [2023-11-26 10:45:05,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-26 10:45:05,334 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 106 transitions. [2023-11-26 10:45:05,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-11-26 10:45:05,336 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:05,336 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 14, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:05,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:05,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 10:45:05,537 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:45:05,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:05,538 INFO L85 PathProgramCache]: Analyzing trace with hash -941367859, now seen corresponding path program 7 times [2023-11-26 10:45:05,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:05,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513728650] [2023-11-26 10:45:05,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:05,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:05,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:06,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-26 10:45:06,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:06,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2023-11-26 10:45:06,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:06,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2023-11-26 10:45:06,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:06,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2931 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 2826 trivial. 0 not checked. [2023-11-26 10:45:06,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:06,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513728650] [2023-11-26 10:45:06,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513728650] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:06,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15286159] [2023-11-26 10:45:06,346 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-26 10:45:06,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:06,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:06,349 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:06,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 10:45:06,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:06,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-26 10:45:06,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:06,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2931 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 2826 trivial. 0 not checked. [2023-11-26 10:45:06,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:07,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2931 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 2826 trivial. 0 not checked. [2023-11-26 10:45:07,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15286159] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:07,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:45:07,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17] total 33 [2023-11-26 10:45:07,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118750016] [2023-11-26 10:45:07,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:07,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-26 10:45:07,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:07,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-26 10:45:07,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2023-11-26 10:45:07,165 INFO L87 Difference]: Start difference. First operand 88 states and 106 transitions. Second operand has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 33 states have internal predecessors, (55), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-26 10:45:07,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:07,229 INFO L93 Difference]: Finished difference Result 176 states and 227 transitions. [2023-11-26 10:45:07,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-26 10:45:07,230 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 33 states have internal predecessors, (55), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 179 [2023-11-26 10:45:07,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:07,232 INFO L225 Difference]: With dead ends: 176 [2023-11-26 10:45:07,233 INFO L226 Difference]: Without dead ends: 104 [2023-11-26 10:45:07,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2023-11-26 10:45:07,235 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:07,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 92 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:45:07,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-11-26 10:45:07,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2023-11-26 10:45:07,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.1717171717171717) internal successors, (116), 99 states have internal predecessors, (116), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:45:07,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 122 transitions. [2023-11-26 10:45:07,261 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 122 transitions. Word has length 179 [2023-11-26 10:45:07,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:07,261 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 122 transitions. [2023-11-26 10:45:07,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 33 states have internal predecessors, (55), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-26 10:45:07,262 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 122 transitions. [2023-11-26 10:45:07,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2023-11-26 10:45:07,264 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:07,264 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 30, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:07,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:07,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-26 10:45:07,472 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:45:07,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:07,472 INFO L85 PathProgramCache]: Analyzing trace with hash 418155725, now seen corresponding path program 8 times [2023-11-26 10:45:07,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:07,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855075414] [2023-11-26 10:45:07,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:07,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:07,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:09,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-26 10:45:09,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:09,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-11-26 10:45:09,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:09,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2023-11-26 10:45:09,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:09,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3291 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 2826 trivial. 0 not checked. [2023-11-26 10:45:09,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:09,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855075414] [2023-11-26 10:45:09,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855075414] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:09,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869575638] [2023-11-26 10:45:09,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:45:09,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:09,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:09,200 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:09,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 10:45:09,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:45:09,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:45:09,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-26 10:45:09,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:09,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3291 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 2826 trivial. 0 not checked. [2023-11-26 10:45:09,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:10,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3291 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 2826 trivial. 0 not checked. [2023-11-26 10:45:10,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869575638] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:10,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:45:10,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 33] total 43 [2023-11-26 10:45:10,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772856667] [2023-11-26 10:45:10,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:10,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-26 10:45:10,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:10,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-26 10:45:10,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2023-11-26 10:45:10,636 INFO L87 Difference]: Start difference. First operand 104 states and 122 transitions. Second operand has 43 states, 43 states have (on average 1.5348837209302326) internal successors, (66), 43 states have internal predecessors, (66), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-26 10:45:10,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:10,736 INFO L93 Difference]: Finished difference Result 186 states and 231 transitions. [2023-11-26 10:45:10,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-26 10:45:10,737 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.5348837209302326) internal successors, (66), 43 states have internal predecessors, (66), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 195 [2023-11-26 10:45:10,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:10,742 INFO L225 Difference]: With dead ends: 186 [2023-11-26 10:45:10,742 INFO L226 Difference]: Without dead ends: 114 [2023-11-26 10:45:10,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 363 SyntacticMatches, 22 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2023-11-26 10:45:10,745 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:10,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 128 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:45:10,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-11-26 10:45:10,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2023-11-26 10:45:10,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.1559633027522935) internal successors, (126), 109 states have internal predecessors, (126), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:45:10,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 132 transitions. [2023-11-26 10:45:10,757 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 132 transitions. Word has length 195 [2023-11-26 10:45:10,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:10,758 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 132 transitions. [2023-11-26 10:45:10,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.5348837209302326) internal successors, (66), 43 states have internal predecessors, (66), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-26 10:45:10,759 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 132 transitions. [2023-11-26 10:45:10,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2023-11-26 10:45:10,762 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:10,762 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 40, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:10,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:10,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-26 10:45:10,972 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:45:10,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:10,972 INFO L85 PathProgramCache]: Analyzing trace with hash 309427757, now seen corresponding path program 9 times [2023-11-26 10:45:10,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:10,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183562431] [2023-11-26 10:45:10,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:10,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:11,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:11,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-26 10:45:11,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:12,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-26 10:45:12,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:12,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2023-11-26 10:45:12,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:12,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3646 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 2121 trivial. 0 not checked. [2023-11-26 10:45:12,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:12,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183562431] [2023-11-26 10:45:12,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183562431] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:12,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159777215] [2023-11-26 10:45:12,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 10:45:12,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:12,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:12,191 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:12,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 10:45:15,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-11-26 10:45:15,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:45:15,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-26 10:45:15,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:16,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3646 backedges. 1240 proven. 105 refuted. 0 times theorem prover too weak. 2301 trivial. 0 not checked. [2023-11-26 10:45:16,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:16,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3646 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 3541 trivial. 0 not checked. [2023-11-26 10:45:16,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159777215] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:16,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:45:16,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 47 [2023-11-26 10:45:16,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020537340] [2023-11-26 10:45:16,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:16,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-26 10:45:16,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:16,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-26 10:45:16,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=631, Invalid=1531, Unknown=0, NotChecked=0, Total=2162 [2023-11-26 10:45:16,819 INFO L87 Difference]: Start difference. First operand 114 states and 132 transitions. Second operand has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 47 states have internal predecessors, (101), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-26 10:45:16,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:16,996 INFO L93 Difference]: Finished difference Result 205 states and 261 transitions. [2023-11-26 10:45:16,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-26 10:45:16,997 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 47 states have internal predecessors, (101), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 205 [2023-11-26 10:45:16,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:16,999 INFO L225 Difference]: With dead ends: 205 [2023-11-26 10:45:16,999 INFO L226 Difference]: Without dead ends: 135 [2023-11-26 10:45:17,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=631, Invalid=1531, Unknown=0, NotChecked=0, Total=2162 [2023-11-26 10:45:17,003 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 44 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:17,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 153 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:45:17,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-26 10:45:17,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2023-11-26 10:45:17,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.140625) internal successors, (146), 128 states have internal predecessors, (146), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:45:17,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 152 transitions. [2023-11-26 10:45:17,020 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 152 transitions. Word has length 205 [2023-11-26 10:45:17,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:17,020 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 152 transitions. [2023-11-26 10:45:17,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 47 states have internal predecessors, (101), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-26 10:45:17,021 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 152 transitions. [2023-11-26 10:45:17,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2023-11-26 10:45:17,025 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:17,025 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 40, 30, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:17,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:17,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-26 10:45:17,242 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:45:17,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:17,243 INFO L85 PathProgramCache]: Analyzing trace with hash 908826188, now seen corresponding path program 10 times [2023-11-26 10:45:17,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:17,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297895583] [2023-11-26 10:45:17,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:17,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:17,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:18,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-26 10:45:18,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:18,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2023-11-26 10:45:18,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:18,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2023-11-26 10:45:18,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:18,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4402 backedges. 0 proven. 1746 refuted. 0 times theorem prover too weak. 2656 trivial. 0 not checked. [2023-11-26 10:45:18,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:18,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297895583] [2023-11-26 10:45:18,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297895583] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:18,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221877531] [2023-11-26 10:45:18,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 10:45:18,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:18,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:18,533 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:18,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-26 10:45:18,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 10:45:18,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:45:18,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 1231 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-26 10:45:18,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:19,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4402 backedges. 1414 proven. 330 refuted. 0 times theorem prover too weak. 2658 trivial. 0 not checked. [2023-11-26 10:45:19,097 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:19,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4402 backedges. 0 proven. 1746 refuted. 0 times theorem prover too weak. 2656 trivial. 0 not checked. [2023-11-26 10:45:19,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221877531] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:19,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:45:19,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 34 [2023-11-26 10:45:19,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785773692] [2023-11-26 10:45:19,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:19,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-26 10:45:19,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:19,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-26 10:45:19,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2023-11-26 10:45:19,772 INFO L87 Difference]: Start difference. First operand 133 states and 152 transitions. Second operand has 34 states, 34 states have (on average 3.4705882352941178) internal successors, (118), 34 states have internal predecessors, (118), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-26 10:45:20,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:20,009 INFO L93 Difference]: Finished difference Result 273 states and 346 transitions. [2023-11-26 10:45:20,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-26 10:45:20,010 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.4705882352941178) internal successors, (118), 34 states have internal predecessors, (118), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 230 [2023-11-26 10:45:20,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:20,013 INFO L225 Difference]: With dead ends: 273 [2023-11-26 10:45:20,013 INFO L226 Difference]: Without dead ends: 184 [2023-11-26 10:45:20,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2023-11-26 10:45:20,016 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 96 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:20,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 94 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:45:20,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-11-26 10:45:20,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2023-11-26 10:45:20,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 179 states have (on average 1.1955307262569832) internal successors, (214), 179 states have internal predecessors, (214), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:45:20,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 220 transitions. [2023-11-26 10:45:20,029 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 220 transitions. Word has length 230 [2023-11-26 10:45:20,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:20,031 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 220 transitions. [2023-11-26 10:45:20,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.4705882352941178) internal successors, (118), 34 states have internal predecessors, (118), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-26 10:45:20,032 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 220 transitions. [2023-11-26 10:45:20,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2023-11-26 10:45:20,040 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:20,040 INFO L195 NwaCegarLoop]: trace histogram [96, 96, 96, 40, 30, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:20,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:20,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-26 10:45:20,249 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:45:20,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:20,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1404254989, now seen corresponding path program 11 times [2023-11-26 10:45:20,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:20,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841201319] [2023-11-26 10:45:20,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:20,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:20,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:22,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-26 10:45:22,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:23,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2023-11-26 10:45:23,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:23,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 279 [2023-11-26 10:45:23,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:23,263 INFO L134 CoverageAnalysis]: Checked inductivity of 15265 backedges. 0 proven. 7798 refuted. 0 times theorem prover too weak. 7467 trivial. 0 not checked. [2023-11-26 10:45:23,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:23,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841201319] [2023-11-26 10:45:23,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841201319] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:23,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391800245] [2023-11-26 10:45:23,264 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 10:45:23,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:23,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:23,266 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:23,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de183490-5e49-4f3b-8725-248fff1fb8d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process