./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya --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 470d7065e9fd450e98d72326ef313763cf0710ea45f0a443b018e8a49bdf7927 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 01:44:38,155 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 01:44:38,223 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 01:44:38,228 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 01:44:38,228 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 01:44:38,253 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 01:44:38,253 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 01:44:38,254 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 01:44:38,254 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 01:44:38,255 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 01:44:38,256 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 01:44:38,256 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 01:44:38,257 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 01:44:38,257 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 01:44:38,258 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 01:44:38,258 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 01:44:38,259 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 01:44:38,259 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 01:44:38,260 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 01:44:38,260 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 01:44:38,260 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 01:44:38,261 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 01:44:38,261 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 01:44:38,262 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 01:44:38,262 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 01:44:38,263 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 01:44:38,263 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 01:44:38,263 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 01:44:38,264 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 01:44:38,264 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 01:44:38,265 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 01:44:38,265 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:44:38,265 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 01:44:38,266 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 01:44:38,266 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 01:44:38,266 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 01:44:38,267 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 01:44:38,267 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 01:44:38,267 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 01:44:38,267 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 01:44:38,268 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 01:44:38,268 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 01:44:38,268 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_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 470d7065e9fd450e98d72326ef313763cf0710ea45f0a443b018e8a49bdf7927 [2023-11-29 01:44:38,514 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 01:44:38,535 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 01:44:38,537 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 01:44:38,539 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 01:44:38,539 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 01:44:38,540 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test1-1.i [2023-11-29 01:44:41,344 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 01:44:41,611 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 01:44:41,611 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test1-1.i [2023-11-29 01:44:41,628 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/data/0f68a0476/2a3e3cd880df400798295c82fb823f0b/FLAG4de8fe2c5 [2023-11-29 01:44:41,644 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/data/0f68a0476/2a3e3cd880df400798295c82fb823f0b [2023-11-29 01:44:41,647 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 01:44:41,648 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 01:44:41,650 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 01:44:41,650 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 01:44:41,655 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 01:44:41,656 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:44:41" (1/1) ... [2023-11-29 01:44:41,657 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c65d52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:44:41, skipping insertion in model container [2023-11-29 01:44:41,658 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:44:41" (1/1) ... [2023-11-29 01:44:41,707 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 01:44:42,125 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_23289e2c-b733-450a-b9af-ad8435d73a46/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test1-1.i[33021,33034] [2023-11-29 01:44:42,206 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:44:42,218 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 01:44:42,250 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_23289e2c-b733-450a-b9af-ad8435d73a46/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test1-1.i[33021,33034] [2023-11-29 01:44:42,291 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:44:42,328 INFO L206 MainTranslator]: Completed translation [2023-11-29 01:44:42,328 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:44:42 WrapperNode [2023-11-29 01:44:42,328 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 01:44:42,330 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 01:44:42,330 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 01:44:42,330 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 01:44:42,338 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:44:42" (1/1) ... [2023-11-29 01:44:42,364 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:44:42" (1/1) ... [2023-11-29 01:44:42,417 INFO L138 Inliner]: procedures = 177, calls = 186, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 790 [2023-11-29 01:44:42,418 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 01:44:42,419 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 01:44:42,419 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 01:44:42,419 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 01:44:42,432 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:44:42" (1/1) ... [2023-11-29 01:44:42,433 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:44:42" (1/1) ... [2023-11-29 01:44:42,443 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:44:42" (1/1) ... [2023-11-29 01:44:42,496 INFO L175 MemorySlicer]: Split 163 memory accesses to 3 slices as follows [2, 156, 5]. 96 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 43 writes are split as follows [0, 42, 1]. [2023-11-29 01:44:42,496 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:44:42" (1/1) ... [2023-11-29 01:44:42,497 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:44:42" (1/1) ... [2023-11-29 01:44:42,531 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:44:42" (1/1) ... [2023-11-29 01:44:42,542 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:44:42" (1/1) ... [2023-11-29 01:44:42,547 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:44:42" (1/1) ... [2023-11-29 01:44:42,559 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:44:42" (1/1) ... [2023-11-29 01:44:42,567 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 01:44:42,568 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 01:44:42,569 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 01:44:42,569 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 01:44:42,570 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:44:42" (1/1) ... [2023-11-29 01:44:42,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:44:42,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:44:42,600 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 01:44:42,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 01:44:42,643 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 01:44:42,643 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 01:44:42,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 01:44:42,644 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-29 01:44:42,644 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-29 01:44:42,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 01:44:42,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 01:44:42,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 01:44:42,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#0 [2023-11-29 01:44:42,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#1 [2023-11-29 01:44:42,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#2 [2023-11-29 01:44:42,645 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#0 [2023-11-29 01:44:42,646 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#1 [2023-11-29 01:44:42,646 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#2 [2023-11-29 01:44:42,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 01:44:42,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 01:44:42,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 01:44:42,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-29 01:44:42,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-29 01:44:42,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-29 01:44:42,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-29 01:44:42,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-29 01:44:42,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-29 01:44:42,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 01:44:42,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 01:44:42,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 01:44:42,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 01:44:42,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 01:44:42,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 01:44:42,829 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 01:44:42,832 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 01:44:43,835 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 01:44:43,874 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 01:44:43,874 INFO L309 CfgBuilder]: Removed 31 assume(true) statements. [2023-11-29 01:44:43,874 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:44:43 BoogieIcfgContainer [2023-11-29 01:44:43,875 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 01:44:43,877 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 01:44:43,877 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 01:44:43,880 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 01:44:43,881 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 01:44:41" (1/3) ... [2023-11-29 01:44:43,881 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e7ce698 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:44:43, skipping insertion in model container [2023-11-29 01:44:43,882 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:44:42" (2/3) ... [2023-11-29 01:44:43,882 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e7ce698 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:44:43, skipping insertion in model container [2023-11-29 01:44:43,882 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:44:43" (3/3) ... [2023-11-29 01:44:43,883 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test1-1.i [2023-11-29 01:44:43,903 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 01:44:43,903 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 01:44:43,955 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:44:43,961 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;@6f809ad9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:44:43,961 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 01:44:43,966 INFO L276 IsEmpty]: Start isEmpty. Operand has 207 states, 190 states have (on average 1.7052631578947368) internal successors, (324), 201 states have internal predecessors, (324), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-29 01:44:43,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-29 01:44:43,974 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:44:43,974 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:44:43,975 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:44:43,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:44:43,980 INFO L85 PathProgramCache]: Analyzing trace with hash -189480315, now seen corresponding path program 1 times [2023-11-29 01:44:43,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:44:43,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228643290] [2023-11-29 01:44:43,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:44:43,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:44:44,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:44:44,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:44:44,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:44:44,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228643290] [2023-11-29 01:44:44,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228643290] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:44:44,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:44:44,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:44:44,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36237374] [2023-11-29 01:44:44,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:44:44,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:44:44,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:44:44,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:44:44,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:44:44,233 INFO L87 Difference]: Start difference. First operand has 207 states, 190 states have (on average 1.7052631578947368) internal successors, (324), 201 states have internal predecessors, (324), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:44:44,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:44:44,331 INFO L93 Difference]: Finished difference Result 585 states and 1003 transitions. [2023-11-29 01:44:44,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:44:44,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-29 01:44:44,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:44:44,351 INFO L225 Difference]: With dead ends: 585 [2023-11-29 01:44:44,352 INFO L226 Difference]: Without dead ends: 377 [2023-11-29 01:44:44,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:44:44,360 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 252 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:44:44,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 653 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:44:44,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2023-11-29 01:44:44,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 206. [2023-11-29 01:44:44,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 190 states have (on average 1.5105263157894737) internal successors, (287), 200 states have internal predecessors, (287), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-29 01:44:44,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 313 transitions. [2023-11-29 01:44:44,421 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 313 transitions. Word has length 9 [2023-11-29 01:44:44,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:44:44,422 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 313 transitions. [2023-11-29 01:44:44,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:44:44,422 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 313 transitions. [2023-11-29 01:44:44,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-29 01:44:44,428 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:44:44,428 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:44:44,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 01:44:44,429 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:44:44,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:44:44,429 INFO L85 PathProgramCache]: Analyzing trace with hash -40822134, now seen corresponding path program 1 times [2023-11-29 01:44:44,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:44:44,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79065236] [2023-11-29 01:44:44,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:44:44,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:44:44,538 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:44:44,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [386870385] [2023-11-29 01:44:44,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:44:44,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:44:44,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:44:44,542 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:44:44,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 01:44:44,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:44:44,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 01:44:44,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:44:44,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:44:44,902 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:44:44,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:44:44,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79065236] [2023-11-29 01:44:44,903 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:44:44,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386870385] [2023-11-29 01:44:44,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386870385] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:44:44,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:44:44,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:44:44,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551360933] [2023-11-29 01:44:44,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:44:44,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:44:44,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:44:44,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:44:44,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:44:44,908 INFO L87 Difference]: Start difference. First operand 206 states and 313 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:44:45,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:44:45,010 INFO L93 Difference]: Finished difference Result 431 states and 655 transitions. [2023-11-29 01:44:45,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:44:45,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2023-11-29 01:44:45,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:44:45,013 INFO L225 Difference]: With dead ends: 431 [2023-11-29 01:44:45,014 INFO L226 Difference]: Without dead ends: 227 [2023-11-29 01:44:45,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:44:45,017 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 9 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:44:45,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 564 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:44:45,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-11-29 01:44:45,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2023-11-29 01:44:45,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 210 states have (on average 1.4619047619047618) internal successors, (307), 220 states have internal predecessors, (307), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-29 01:44:45,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 333 transitions. [2023-11-29 01:44:45,037 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 333 transitions. Word has length 84 [2023-11-29 01:44:45,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:44:45,037 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 333 transitions. [2023-11-29 01:44:45,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:44:45,038 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 333 transitions. [2023-11-29 01:44:45,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-29 01:44:45,042 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:44:45,042 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:44:45,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 01:44:45,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-29 01:44:45,248 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:44:45,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:44:45,249 INFO L85 PathProgramCache]: Analyzing trace with hash 451804040, now seen corresponding path program 1 times [2023-11-29 01:44:45,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:44:45,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518370738] [2023-11-29 01:44:45,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:44:45,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:44:45,310 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:44:45,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1404869751] [2023-11-29 01:44:45,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:44:45,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:44:45,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:44:45,312 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:44:45,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 01:44:45,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:44:45,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 01:44:45,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:44:45,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:44:45,633 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:44:45,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:44:45,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518370738] [2023-11-29 01:44:45,634 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:44:45,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404869751] [2023-11-29 01:44:45,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404869751] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:44:45,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:44:45,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:44:45,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443645847] [2023-11-29 01:44:45,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:44:45,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:44:45,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:44:45,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:44:45,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:44:45,636 INFO L87 Difference]: Start difference. First operand 226 states and 333 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:44:45,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:44:45,728 INFO L93 Difference]: Finished difference Result 437 states and 651 transitions. [2023-11-29 01:44:45,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:44:45,728 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2023-11-29 01:44:45,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:44:45,730 INFO L225 Difference]: With dead ends: 437 [2023-11-29 01:44:45,731 INFO L226 Difference]: Without dead ends: 213 [2023-11-29 01:44:45,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:44:45,733 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 165 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:44:45,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 694 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:44:45,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-11-29 01:44:45,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 212. [2023-11-29 01:44:45,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 196 states have (on average 1.4591836734693877) internal successors, (286), 206 states have internal predecessors, (286), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-29 01:44:45,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 312 transitions. [2023-11-29 01:44:45,748 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 312 transitions. Word has length 84 [2023-11-29 01:44:45,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:44:45,749 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 312 transitions. [2023-11-29 01:44:45,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:44:45,749 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 312 transitions. [2023-11-29 01:44:45,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-29 01:44:45,751 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:44:45,752 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:44:45,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 01:44:45,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-29 01:44:45,956 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:44:45,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:44:45,957 INFO L85 PathProgramCache]: Analyzing trace with hash -209873770, now seen corresponding path program 1 times [2023-11-29 01:44:45,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:44:45,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142834999] [2023-11-29 01:44:45,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:44:45,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:44:46,008 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:44:46,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1258126768] [2023-11-29 01:44:46,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:44:46,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:44:46,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:44:46,010 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:44:46,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 01:44:46,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:44:46,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 01:44:46,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:44:46,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:44:46,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:44:46,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:44:46,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:44:46,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142834999] [2023-11-29 01:44:46,524 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:44:46,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258126768] [2023-11-29 01:44:46,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258126768] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:44:46,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:44:46,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-11-29 01:44:46,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312442390] [2023-11-29 01:44:46,525 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:44:46,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:44:46,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:44:46,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:44:46,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:44:46,527 INFO L87 Difference]: Start difference. First operand 212 states and 312 transitions. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 5 states have internal predecessors, (160), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:44:46,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:44:46,651 INFO L93 Difference]: Finished difference Result 775 states and 1137 transitions. [2023-11-29 01:44:46,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 01:44:46,652 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 5 states have internal predecessors, (160), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2023-11-29 01:44:46,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:44:46,658 INFO L225 Difference]: With dead ends: 775 [2023-11-29 01:44:46,658 INFO L226 Difference]: Without dead ends: 746 [2023-11-29 01:44:46,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:44:46,660 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 1003 mSDsluCounter, 885 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1015 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:44:46,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1015 Valid, 1184 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:44:46,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2023-11-29 01:44:46,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 746. [2023-11-29 01:44:46,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 721 states have (on average 1.4452149791955617) internal successors, (1042), 731 states have internal predecessors, (1042), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 13 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-29 01:44:46,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1086 transitions. [2023-11-29 01:44:46,696 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1086 transitions. Word has length 84 [2023-11-29 01:44:46,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:44:46,697 INFO L495 AbstractCegarLoop]: Abstraction has 746 states and 1086 transitions. [2023-11-29 01:44:46,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 5 states have internal predecessors, (160), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:44:46,697 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1086 transitions. [2023-11-29 01:44:46,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2023-11-29 01:44:46,704 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:44:46,705 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:44:46,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 01:44:46,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:44:46,911 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:44:46,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:44:46,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1375306053, now seen corresponding path program 2 times [2023-11-29 01:44:46,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:44:46,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523795703] [2023-11-29 01:44:46,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:44:46,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:44:47,053 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:44:47,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2115677981] [2023-11-29 01:44:47,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:44:47,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:44:47,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:44:47,056 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:44:47,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 01:44:47,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 01:44:47,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:44:47,420 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 01:44:47,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:44:48,634 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2023-11-29 01:44:48,634 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:44:48,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:44:48,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523795703] [2023-11-29 01:44:48,635 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:44:48,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115677981] [2023-11-29 01:44:48,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115677981] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:44:48,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:44:48,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:44:48,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17280428] [2023-11-29 01:44:48,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:44:48,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:44:48,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:44:48,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:44:48,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:44:48,638 INFO L87 Difference]: Start difference. First operand 746 states and 1086 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:44:48,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:44:48,915 INFO L93 Difference]: Finished difference Result 1362 states and 1980 transitions. [2023-11-29 01:44:48,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:44:48,915 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 309 [2023-11-29 01:44:48,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:44:48,921 INFO L225 Difference]: With dead ends: 1362 [2023-11-29 01:44:48,921 INFO L226 Difference]: Without dead ends: 744 [2023-11-29 01:44:48,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:44:48,923 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 123 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:44:48,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 856 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:44:48,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2023-11-29 01:44:48,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2023-11-29 01:44:48,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 719 states have (on average 1.4450625869262865) internal successors, (1039), 729 states have internal predecessors, (1039), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 13 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-29 01:44:48,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1083 transitions. [2023-11-29 01:44:48,947 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1083 transitions. Word has length 309 [2023-11-29 01:44:48,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:44:48,948 INFO L495 AbstractCegarLoop]: Abstraction has 744 states and 1083 transitions. [2023-11-29 01:44:48,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:44:48,948 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1083 transitions. [2023-11-29 01:44:48,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2023-11-29 01:44:48,953 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:44:48,953 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:44:48,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 01:44:49,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:44:49,154 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:44:49,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:44:49,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1382171004, now seen corresponding path program 1 times [2023-11-29 01:44:49,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:44:49,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411568590] [2023-11-29 01:44:49,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:44:49,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:44:49,294 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:44:49,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1300870974] [2023-11-29 01:44:49,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:44:49,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:44:49,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:44:49,296 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:44:49,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 01:44:49,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:44:49,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 1633 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 01:44:49,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:44:50,395 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 448 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 01:44:50,395 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:44:50,837 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 448 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 01:44:50,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:44:50,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411568590] [2023-11-29 01:44:50,838 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:44:50,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300870974] [2023-11-29 01:44:50,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300870974] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:44:50,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:44:50,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-29 01:44:50,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905099314] [2023-11-29 01:44:50,839 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:44:50,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 01:44:50,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:44:50,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 01:44:50,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-29 01:44:50,844 INFO L87 Difference]: Start difference. First operand 744 states and 1083 transitions. Second operand has 12 states, 12 states have (on average 51.833333333333336) internal successors, (622), 12 states have internal predecessors, (622), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 01:44:51,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:44:51,113 INFO L93 Difference]: Finished difference Result 1841 states and 2685 transitions. [2023-11-29 01:44:51,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 01:44:51,114 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 51.833333333333336) internal successors, (622), 12 states have internal predecessors, (622), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 322 [2023-11-29 01:44:51,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:44:51,127 INFO L225 Difference]: With dead ends: 1841 [2023-11-29 01:44:51,127 INFO L226 Difference]: Without dead ends: 1812 [2023-11-29 01:44:51,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 642 GetRequests, 632 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-29 01:44:51,129 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 3569 mSDsluCounter, 2389 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3595 SdHoareTripleChecker+Valid, 2808 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:44:51,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3595 Valid, 2808 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:44:51,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2023-11-29 01:44:51,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1812. [2023-11-29 01:44:51,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1812 states, 1769 states have (on average 1.4420576596947428) internal successors, (2551), 1779 states have internal predecessors, (2551), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 01:44:51,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1812 states to 1812 states and 2631 transitions. [2023-11-29 01:44:51,191 INFO L78 Accepts]: Start accepts. Automaton has 1812 states and 2631 transitions. Word has length 322 [2023-11-29 01:44:51,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:44:51,192 INFO L495 AbstractCegarLoop]: Abstraction has 1812 states and 2631 transitions. [2023-11-29 01:44:51,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 51.833333333333336) internal successors, (622), 12 states have internal predecessors, (622), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 01:44:51,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1812 states and 2631 transitions. [2023-11-29 01:44:51,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 773 [2023-11-29 01:44:51,221 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:44:51,222 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:44:51,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 01:44:51,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:44:51,423 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:44:51,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:44:51,423 INFO L85 PathProgramCache]: Analyzing trace with hash -232404516, now seen corresponding path program 2 times [2023-11-29 01:44:51,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:44:51,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684000933] [2023-11-29 01:44:51,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:44:51,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:44:51,732 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:44:51,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [444708483] [2023-11-29 01:44:51,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:44:51,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:44:51,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:44:51,733 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:44:51,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 01:45:05,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:45:05,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:45:05,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 3775 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 01:45:05,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:45:05,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-29 01:45:05,644 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:45:05,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 24 [2023-11-29 01:45:05,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3370 backedges. 883 proven. 32 refuted. 0 times theorem prover too weak. 2455 trivial. 0 not checked. [2023-11-29 01:45:05,888 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:45:06,682 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:45:06,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 24 [2023-11-29 01:45:08,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:45:08,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684000933] [2023-11-29 01:45:08,973 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:45:08,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444708483] [2023-11-29 01:45:08,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444708483] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:45:08,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:45:08,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-11-29 01:45:08,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582864347] [2023-11-29 01:45:08,974 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:45:08,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 01:45:08,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:45:08,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 01:45:08,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2023-11-29 01:45:08,976 INFO L87 Difference]: Start difference. First operand 1812 states and 2631 transitions. Second operand has 14 states, 14 states have (on average 14.071428571428571) internal successors, (197), 14 states have internal predecessors, (197), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:45:12,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:45:12,872 INFO L93 Difference]: Finished difference Result 3405 states and 4937 transitions. [2023-11-29 01:45:12,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 01:45:12,872 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 14.071428571428571) internal successors, (197), 14 states have internal predecessors, (197), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 772 [2023-11-29 01:45:12,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:45:12,883 INFO L225 Difference]: With dead ends: 3405 [2023-11-29 01:45:12,883 INFO L226 Difference]: Without dead ends: 1849 [2023-11-29 01:45:12,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1484 GetRequests, 1454 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2023-11-29 01:45:12,886 INFO L413 NwaCegarLoop]: 523 mSDtfsCounter, 1175 mSDsluCounter, 2643 mSDsCounter, 0 mSdLazyCounter, 2782 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1180 SdHoareTripleChecker+Valid, 3166 SdHoareTripleChecker+Invalid, 2793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-11-29 01:45:12,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1180 Valid, 3166 Invalid, 2793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2782 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-11-29 01:45:12,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1849 states. [2023-11-29 01:45:12,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1849 to 1844. [2023-11-29 01:45:12,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1844 states, 1801 states have (on average 1.4369794558578568) internal successors, (2588), 1811 states have internal predecessors, (2588), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 01:45:12,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 2668 transitions. [2023-11-29 01:45:12,946 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 2668 transitions. Word has length 772 [2023-11-29 01:45:12,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:45:12,947 INFO L495 AbstractCegarLoop]: Abstraction has 1844 states and 2668 transitions. [2023-11-29 01:45:12,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.071428571428571) internal successors, (197), 14 states have internal predecessors, (197), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:45:12,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 2668 transitions. [2023-11-29 01:45:12,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 773 [2023-11-29 01:45:12,958 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:45:12,959 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:45:13,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 01:45:13,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:45:13,172 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:45:13,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:45:13,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1805839138, now seen corresponding path program 1 times [2023-11-29 01:45:13,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:45:13,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093454281] [2023-11-29 01:45:13,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:45:13,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:45:13,406 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:45:13,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1612675789] [2023-11-29 01:45:13,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:45:13,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:45:13,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:45:13,408 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:45:13,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 01:45:14,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:45:14,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 3773 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:45:14,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:45:14,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3370 backedges. 837 proven. 0 refuted. 0 times theorem prover too weak. 2533 trivial. 0 not checked. [2023-11-29 01:45:14,650 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:45:14,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:45:14,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093454281] [2023-11-29 01:45:14,650 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:45:14,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612675789] [2023-11-29 01:45:14,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612675789] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:45:14,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:45:14,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:45:14,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248527332] [2023-11-29 01:45:14,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:45:14,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:45:14,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:45:14,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:45:14,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:45:14,653 INFO L87 Difference]: Start difference. First operand 1844 states and 2668 transitions. Second operand has 4 states, 4 states have (on average 45.75) internal successors, (183), 4 states have internal predecessors, (183), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:45:14,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:45:14,731 INFO L93 Difference]: Finished difference Result 3199 states and 4541 transitions. [2023-11-29 01:45:14,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:45:14,731 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.75) internal successors, (183), 4 states have internal predecessors, (183), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 772 [2023-11-29 01:45:14,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:45:14,739 INFO L225 Difference]: With dead ends: 3199 [2023-11-29 01:45:14,739 INFO L226 Difference]: Without dead ends: 1362 [2023-11-29 01:45:14,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 772 GetRequests, 769 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:45:14,743 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 78 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:45:14,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 562 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:45:14,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2023-11-29 01:45:14,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1362. [2023-11-29 01:45:14,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 1319 states have (on average 1.3495072024260804) internal successors, (1780), 1329 states have internal predecessors, (1780), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 01:45:14,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 1860 transitions. [2023-11-29 01:45:14,790 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 1860 transitions. Word has length 772 [2023-11-29 01:45:14,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:45:14,790 INFO L495 AbstractCegarLoop]: Abstraction has 1362 states and 1860 transitions. [2023-11-29 01:45:14,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.75) internal successors, (183), 4 states have internal predecessors, (183), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:45:14,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 1860 transitions. [2023-11-29 01:45:14,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 774 [2023-11-29 01:45:14,800 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:45:14,800 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:45:14,816 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 01:45:15,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:45:15,001 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:45:15,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:45:15,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1553710704, now seen corresponding path program 1 times [2023-11-29 01:45:15,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:45:15,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219852325] [2023-11-29 01:45:15,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:45:15,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:45:15,314 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:45:15,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1754064321] [2023-11-29 01:45:15,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:45:15,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:45:15,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:45:15,320 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:45:15,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 01:45:42,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:45:42,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 3776 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-29 01:45:42,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:45:42,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-29 01:45:42,740 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:45:42,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 24 [2023-11-29 01:45:42,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3370 backedges. 1347 proven. 137 refuted. 0 times theorem prover too weak. 1886 trivial. 0 not checked. [2023-11-29 01:45:42,890 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:45:43,486 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:45:43,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 24 [2023-11-29 01:45:49,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:45:49,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219852325] [2023-11-29 01:45:49,585 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:45:49,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754064321] [2023-11-29 01:45:49,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754064321] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:45:49,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:45:49,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-11-29 01:45:49,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261520694] [2023-11-29 01:45:49,586 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:45:49,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 01:45:49,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:45:49,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 01:45:49,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2023-11-29 01:45:49,595 INFO L87 Difference]: Start difference. First operand 1362 states and 1860 transitions. Second operand has 16 states, 16 states have (on average 17.0625) internal successors, (273), 16 states have internal predecessors, (273), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:45:55,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:45:56,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:45:56,979 INFO L93 Difference]: Finished difference Result 2425 states and 3324 transitions. [2023-11-29 01:45:56,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 01:45:56,979 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 17.0625) internal successors, (273), 16 states have internal predecessors, (273), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 773 [2023-11-29 01:45:56,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:45:56,986 INFO L225 Difference]: With dead ends: 2425 [2023-11-29 01:45:56,986 INFO L226 Difference]: Without dead ends: 1362 [2023-11-29 01:45:56,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1486 GetRequests, 1453 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=223, Invalid=967, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 01:45:56,989 INFO L413 NwaCegarLoop]: 524 mSDtfsCounter, 701 mSDsluCounter, 4295 mSDsCounter, 0 mSdLazyCounter, 3012 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 4819 SdHoareTripleChecker+Invalid, 3022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 3012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:45:56,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [709 Valid, 4819 Invalid, 3022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 3012 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2023-11-29 01:45:56,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2023-11-29 01:45:57,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1362. [2023-11-29 01:45:57,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 1319 states have (on average 1.3487490523123578) internal successors, (1779), 1329 states have internal predecessors, (1779), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 01:45:57,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 1859 transitions. [2023-11-29 01:45:57,036 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 1859 transitions. Word has length 773 [2023-11-29 01:45:57,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:45:57,036 INFO L495 AbstractCegarLoop]: Abstraction has 1362 states and 1859 transitions. [2023-11-29 01:45:57,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 17.0625) internal successors, (273), 16 states have internal predecessors, (273), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:45:57,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 1859 transitions. [2023-11-29 01:45:57,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 775 [2023-11-29 01:45:57,046 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:45:57,046 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:45:57,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 01:45:57,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:45:57,247 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:45:57,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:45:57,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1822214554, now seen corresponding path program 2 times [2023-11-29 01:45:57,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:45:57,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182094326] [2023-11-29 01:45:57,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:45:57,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:45:57,508 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:45:57,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [762166609] [2023-11-29 01:45:57,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:45:57,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:45:57,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:45:57,510 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:45:57,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 01:46:15,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:46:15,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:46:15,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 3777 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 01:46:15,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:46:15,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-29 01:46:15,908 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:46:15,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 24 [2023-11-29 01:46:16,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3371 backedges. 1661 proven. 318 refuted. 0 times theorem prover too weak. 1392 trivial. 0 not checked. [2023-11-29 01:46:16,048 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:46:16,614 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:46:16,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 24 [2023-11-29 01:46:27,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:46:27,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182094326] [2023-11-29 01:46:27,851 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:46:27,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762166609] [2023-11-29 01:46:27,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762166609] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:46:27,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:46:27,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-11-29 01:46:27,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7974879] [2023-11-29 01:46:27,852 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:46:27,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 01:46:27,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:46:27,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 01:46:27,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2023-11-29 01:46:27,854 INFO L87 Difference]: Start difference. First operand 1362 states and 1859 transitions. Second operand has 15 states, 15 states have (on average 23.266666666666666) internal successors, (349), 15 states have internal predecessors, (349), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:46:34,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:46:34,111 INFO L93 Difference]: Finished difference Result 2292 states and 3142 transitions. [2023-11-29 01:46:34,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 01:46:34,111 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 23.266666666666666) internal successors, (349), 15 states have internal predecessors, (349), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 774 [2023-11-29 01:46:34,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:46:34,117 INFO L225 Difference]: With dead ends: 2292 [2023-11-29 01:46:34,117 INFO L226 Difference]: Without dead ends: 1362 [2023-11-29 01:46:34,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1488 GetRequests, 1455 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=231, Invalid=959, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 01:46:34,119 INFO L413 NwaCegarLoop]: 757 mSDtfsCounter, 557 mSDsluCounter, 6181 mSDsCounter, 0 mSdLazyCounter, 3408 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 6938 SdHoareTripleChecker+Invalid, 3413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 3408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-11-29 01:46:34,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [566 Valid, 6938 Invalid, 3413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 3408 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2023-11-29 01:46:34,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2023-11-29 01:46:34,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1362. [2023-11-29 01:46:34,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 1319 states have (on average 1.3479909021986354) internal successors, (1778), 1329 states have internal predecessors, (1778), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 01:46:34,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 1858 transitions. [2023-11-29 01:46:34,154 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 1858 transitions. Word has length 774 [2023-11-29 01:46:34,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:46:34,155 INFO L495 AbstractCegarLoop]: Abstraction has 1362 states and 1858 transitions. [2023-11-29 01:46:34,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 23.266666666666666) internal successors, (349), 15 states have internal predecessors, (349), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:46:34,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 1858 transitions. [2023-11-29 01:46:34,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 776 [2023-11-29 01:46:34,162 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:46:34,162 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 7, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:46:34,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 01:46:34,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 01:46:34,363 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:46:34,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:46:34,364 INFO L85 PathProgramCache]: Analyzing trace with hash 2037489970, now seen corresponding path program 3 times [2023-11-29 01:46:34,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:46:34,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390276025] [2023-11-29 01:46:34,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:46:34,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:46:34,576 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:46:34,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2095419534] [2023-11-29 01:46:34,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:46:34,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:46:34,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:46:34,577 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:46:34,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 01:46:35,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 01:46:35,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:46:35,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 01:46:35,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:46:35,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3373 backedges. 629 proven. 0 refuted. 0 times theorem prover too weak. 2744 trivial. 0 not checked. [2023-11-29 01:46:35,639 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:46:35,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:46:35,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390276025] [2023-11-29 01:46:35,640 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:46:35,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095419534] [2023-11-29 01:46:35,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095419534] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:46:35,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:46:35,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 01:46:35,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374515440] [2023-11-29 01:46:35,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:46:35,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 01:46:35,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:46:35,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 01:46:35,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:46:35,642 INFO L87 Difference]: Start difference. First operand 1362 states and 1858 transitions. Second operand has 8 states, 8 states have (on average 20.625) internal successors, (165), 8 states have internal predecessors, (165), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:46:35,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:46:35,872 INFO L93 Difference]: Finished difference Result 2759 states and 3790 transitions. [2023-11-29 01:46:35,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:46:35,872 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.625) internal successors, (165), 8 states have internal predecessors, (165), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 775 [2023-11-29 01:46:35,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:46:35,878 INFO L225 Difference]: With dead ends: 2759 [2023-11-29 01:46:35,878 INFO L226 Difference]: Without dead ends: 1432 [2023-11-29 01:46:35,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 768 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:46:35,880 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 23 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:46:35,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 926 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:46:35,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2023-11-29 01:46:35,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 1411. [2023-11-29 01:46:35,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1411 states, 1368 states have (on average 1.338450292397661) internal successors, (1831), 1378 states have internal predecessors, (1831), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 01:46:35,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1411 states to 1411 states and 1911 transitions. [2023-11-29 01:46:35,914 INFO L78 Accepts]: Start accepts. Automaton has 1411 states and 1911 transitions. Word has length 775 [2023-11-29 01:46:35,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:46:35,915 INFO L495 AbstractCegarLoop]: Abstraction has 1411 states and 1911 transitions. [2023-11-29 01:46:35,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.625) internal successors, (165), 8 states have internal predecessors, (165), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:46:35,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1411 states and 1911 transitions. [2023-11-29 01:46:35,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 786 [2023-11-29 01:46:35,940 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:46:35,941 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 7, 7, 7, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:46:35,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 01:46:36,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 01:46:36,142 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:46:36,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:46:36,143 INFO L85 PathProgramCache]: Analyzing trace with hash -19837213, now seen corresponding path program 1 times [2023-11-29 01:46:36,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:46:36,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342499968] [2023-11-29 01:46:36,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:46:36,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:46:36,347 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:46:36,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1223287179] [2023-11-29 01:46:36,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:46:36,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:46:36,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:46:36,348 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:46:36,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 01:46:50,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:46:50,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 3788 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 01:46:50,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:46:50,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3397 backedges. 935 proven. 0 refuted. 0 times theorem prover too weak. 2462 trivial. 0 not checked. [2023-11-29 01:46:50,336 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:46:50,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:46:50,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342499968] [2023-11-29 01:46:50,336 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:46:50,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223287179] [2023-11-29 01:46:50,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223287179] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:46:50,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:46:50,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 01:46:50,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130446748] [2023-11-29 01:46:50,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:46:50,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:46:50,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:46:50,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:46:50,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:46:50,340 INFO L87 Difference]: Start difference. First operand 1411 states and 1911 transitions. Second operand has 6 states, 6 states have (on average 33.666666666666664) internal successors, (202), 6 states have internal predecessors, (202), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:46:50,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:46:50,557 INFO L93 Difference]: Finished difference Result 2826 states and 3849 transitions. [2023-11-29 01:46:50,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 01:46:50,557 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 33.666666666666664) internal successors, (202), 6 states have internal predecessors, (202), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 785 [2023-11-29 01:46:50,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:46:50,565 INFO L225 Difference]: With dead ends: 2826 [2023-11-29 01:46:50,566 INFO L226 Difference]: Without dead ends: 1461 [2023-11-29 01:46:50,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 784 GetRequests, 780 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:46:50,569 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 6 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 876 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:46:50,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 876 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:46:50,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2023-11-29 01:46:50,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 1451. [2023-11-29 01:46:50,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1451 states, 1408 states have (on average 1.3359375) internal successors, (1881), 1418 states have internal predecessors, (1881), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 01:46:50,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1451 states to 1451 states and 1961 transitions. [2023-11-29 01:46:50,630 INFO L78 Accepts]: Start accepts. Automaton has 1451 states and 1961 transitions. Word has length 785 [2023-11-29 01:46:50,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:46:50,631 INFO L495 AbstractCegarLoop]: Abstraction has 1451 states and 1961 transitions. [2023-11-29 01:46:50,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 33.666666666666664) internal successors, (202), 6 states have internal predecessors, (202), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:46:50,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1451 states and 1961 transitions. [2023-11-29 01:46:50,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 786 [2023-11-29 01:46:50,646 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:46:50,646 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 7, 7, 7, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:46:50,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 01:46:50,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 01:46:50,847 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:46:50,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:46:50,848 INFO L85 PathProgramCache]: Analyzing trace with hash -2004371231, now seen corresponding path program 1 times [2023-11-29 01:46:50,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:46:50,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124318571] [2023-11-29 01:46:50,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:46:50,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:46:51,119 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:46:51,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1632815817] [2023-11-29 01:46:51,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:46:51,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:46:51,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:46:51,120 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:46:51,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 01:47:08,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:47:08,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 3782 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-29 01:47:08,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:47:08,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-29 01:47:09,308 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:47:09,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 24 [2023-11-29 01:47:09,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3397 backedges. 1429 proven. 1799 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2023-11-29 01:47:09,456 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:47:10,106 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:47:10,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 24 [2023-11-29 01:47:36,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:47:36,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124318571] [2023-11-29 01:47:36,331 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:47:36,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632815817] [2023-11-29 01:47:36,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632815817] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:47:36,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:47:36,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-11-29 01:47:36,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450171429] [2023-11-29 01:47:36,332 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:47:36,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 01:47:36,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:47:36,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 01:47:36,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 01:47:36,334 INFO L87 Difference]: Start difference. First operand 1451 states and 1961 transitions. Second operand has 19 states, 19 states have (on average 34.63157894736842) internal successors, (658), 19 states have internal predecessors, (658), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:47:38,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:47:48,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:47:51,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:47:51,101 INFO L93 Difference]: Finished difference Result 1868 states and 2541 transitions. [2023-11-29 01:47:51,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 01:47:51,102 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 34.63157894736842) internal successors, (658), 19 states have internal predecessors, (658), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 785 [2023-11-29 01:47:51,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:47:51,108 INFO L225 Difference]: With dead ends: 1868 [2023-11-29 01:47:51,108 INFO L226 Difference]: Without dead ends: 1444 [2023-11-29 01:47:51,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1509 GetRequests, 1468 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=331, Invalid=1475, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 01:47:51,110 INFO L413 NwaCegarLoop]: 1421 mSDtfsCounter, 1108 mSDsluCounter, 15873 mSDsCounter, 0 mSdLazyCounter, 6438 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1129 SdHoareTripleChecker+Valid, 17294 SdHoareTripleChecker+Invalid, 6446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 6438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:47:51,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1129 Valid, 17294 Invalid, 6446 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [8 Valid, 6438 Invalid, 0 Unknown, 0 Unchecked, 14.3s Time] [2023-11-29 01:47:51,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2023-11-29 01:47:51,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 1444. [2023-11-29 01:47:51,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1401 states have (on average 1.3354746609564596) internal successors, (1871), 1411 states have internal predecessors, (1871), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 01:47:51,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 1951 transitions. [2023-11-29 01:47:51,158 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 1951 transitions. Word has length 785 [2023-11-29 01:47:51,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:47:51,159 INFO L495 AbstractCegarLoop]: Abstraction has 1444 states and 1951 transitions. [2023-11-29 01:47:51,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 34.63157894736842) internal successors, (658), 19 states have internal predecessors, (658), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:47:51,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 1951 transitions. [2023-11-29 01:47:51,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 787 [2023-11-29 01:47:51,168 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:47:51,169 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 6, 6, 6, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:47:51,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-29 01:47:51,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:47:51,370 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:47:51,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:47:51,370 INFO L85 PathProgramCache]: Analyzing trace with hash -637489990, now seen corresponding path program 2 times [2023-11-29 01:47:51,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:47:51,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399564171] [2023-11-29 01:47:51,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:47:51,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:47:51,617 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:47:51,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [496824629] [2023-11-29 01:47:51,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:47:51,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:47:51,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:47:51,618 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:47:51,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 01:48:16,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:48:16,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:48:17,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 3781 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-29 01:48:17,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:48:17,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-29 01:48:17,748 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:48:17,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 24 [2023-11-29 01:48:17,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3397 backedges. 1836 proven. 578 refuted. 0 times theorem prover too weak. 983 trivial. 0 not checked. [2023-11-29 01:48:17,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:48:18,490 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:48:18,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 24 [2023-11-29 01:48:36,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:36,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399564171] [2023-11-29 01:48:36,220 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:48:36,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496824629] [2023-11-29 01:48:36,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496824629] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:48:36,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:48:36,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-11-29 01:48:36,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862831053] [2023-11-29 01:48:36,221 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:48:36,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 01:48:36,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:36,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 01:48:36,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2023-11-29 01:48:36,224 INFO L87 Difference]: Start difference. First operand 1444 states and 1951 transitions. Second operand has 17 states, 17 states have (on average 25.529411764705884) internal successors, (434), 17 states have internal predecessors, (434), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:48:42,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:48:44,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:48:46,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:48:46,316 INFO L93 Difference]: Finished difference Result 2286 states and 3103 transitions. [2023-11-29 01:48:46,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 01:48:46,316 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 25.529411764705884) internal successors, (434), 17 states have internal predecessors, (434), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 786 [2023-11-29 01:48:46,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:48:46,322 INFO L225 Difference]: With dead ends: 2286 [2023-11-29 01:48:46,322 INFO L226 Difference]: Without dead ends: 1437 [2023-11-29 01:48:46,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1511 GetRequests, 1475 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=261, Invalid=1145, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 01:48:46,324 INFO L413 NwaCegarLoop]: 863 mSDtfsCounter, 809 mSDsluCounter, 7868 mSDsCounter, 0 mSdLazyCounter, 4319 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 8731 SdHoareTripleChecker+Invalid, 4325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 4319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2023-11-29 01:48:46,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [823 Valid, 8731 Invalid, 4325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 4319 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2023-11-29 01:48:46,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1437 states. [2023-11-29 01:48:46,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1437 to 1437. [2023-11-29 01:48:46,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1437 states, 1394 states have (on average 1.3350071736011477) internal successors, (1861), 1404 states have internal predecessors, (1861), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 01:48:46,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 1941 transitions. [2023-11-29 01:48:46,357 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 1941 transitions. Word has length 786 [2023-11-29 01:48:46,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:48:46,358 INFO L495 AbstractCegarLoop]: Abstraction has 1437 states and 1941 transitions. [2023-11-29 01:48:46,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 25.529411764705884) internal successors, (434), 17 states have internal predecessors, (434), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:48:46,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 1941 transitions. [2023-11-29 01:48:46,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 788 [2023-11-29 01:48:46,365 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:48:46,366 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:48:46,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 01:48:46,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:46,567 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:48:46,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:46,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1625201983, now seen corresponding path program 3 times [2023-11-29 01:48:46,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:46,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60139708] [2023-11-29 01:48:46,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:46,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:46,796 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:48:46,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [217781903] [2023-11-29 01:48:46,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:48:46,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:46,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:48:46,798 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:48:46,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 01:48:48,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 01:48:48,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:48:48,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 01:48:48,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:48:48,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3400 backedges. 633 proven. 0 refuted. 0 times theorem prover too weak. 2767 trivial. 0 not checked. [2023-11-29 01:48:48,124 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:48:48,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:48,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60139708] [2023-11-29 01:48:48,124 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:48:48,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217781903] [2023-11-29 01:48:48,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217781903] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:48:48,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:48:48,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 01:48:48,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327049009] [2023-11-29 01:48:48,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:48:48,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:48:48,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:48,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:48:48,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:48:48,126 INFO L87 Difference]: Start difference. First operand 1437 states and 1941 transitions. Second operand has 7 states, 7 states have (on average 24.142857142857142) internal successors, (169), 7 states have internal predecessors, (169), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:48:48,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:48:48,400 INFO L93 Difference]: Finished difference Result 2866 states and 3890 transitions. [2023-11-29 01:48:48,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:48:48,401 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.142857142857142) internal successors, (169), 7 states have internal predecessors, (169), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 787 [2023-11-29 01:48:48,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:48:48,406 INFO L225 Difference]: With dead ends: 2866 [2023-11-29 01:48:48,406 INFO L226 Difference]: Without dead ends: 1487 [2023-11-29 01:48:48,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 790 GetRequests, 782 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-29 01:48:48,409 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 38 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1011 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:48:48,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 1011 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:48:48,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2023-11-29 01:48:48,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 1457. [2023-11-29 01:48:48,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1457 states, 1414 states have (on average 1.3302687411598302) internal successors, (1881), 1424 states have internal predecessors, (1881), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 01:48:48,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1457 states to 1457 states and 1961 transitions. [2023-11-29 01:48:48,443 INFO L78 Accepts]: Start accepts. Automaton has 1457 states and 1961 transitions. Word has length 787 [2023-11-29 01:48:48,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:48:48,444 INFO L495 AbstractCegarLoop]: Abstraction has 1457 states and 1961 transitions. [2023-11-29 01:48:48,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.142857142857142) internal successors, (169), 7 states have internal predecessors, (169), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:48:48,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1457 states and 1961 transitions. [2023-11-29 01:48:48,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 793 [2023-11-29 01:48:48,451 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:48:48,452 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:48:48,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 01:48:48,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 01:48:48,652 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:48:48,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:48,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1479284138, now seen corresponding path program 1 times [2023-11-29 01:48:48,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:48,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018315453] [2023-11-29 01:48:48,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:48,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:48,906 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:48:48,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2114585233] [2023-11-29 01:48:48,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:48,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:48,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:48:48,908 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:48:48,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 01:49:29,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:29,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 3785 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-29 01:49:29,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:49:30,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-29 01:49:31,011 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:49:31,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 24 [2023-11-29 01:49:31,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3410 backedges. 403 proven. 3004 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 01:49:31,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:49:31,845 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:49:31,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 24 [2023-11-29 01:50:12,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:50:12,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018315453] [2023-11-29 01:50:12,336 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:50:12,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114585233] [2023-11-29 01:50:12,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114585233] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:50:12,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:50:12,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-11-29 01:50:12,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141372594] [2023-11-29 01:50:12,337 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:50:12,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 01:50:12,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:50:12,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 01:50:12,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1395, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 01:50:12,340 INFO L87 Difference]: Start difference. First operand 1457 states and 1961 transitions. Second operand has 23 states, 23 states have (on average 34.130434782608695) internal successors, (785), 23 states have internal predecessors, (785), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:50:27,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:50:27,973 INFO L93 Difference]: Finished difference Result 1773 states and 2395 transitions. [2023-11-29 01:50:27,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 01:50:27,974 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 34.130434782608695) internal successors, (785), 23 states have internal predecessors, (785), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 792 [2023-11-29 01:50:27,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:50:27,981 INFO L225 Difference]: With dead ends: 1773 [2023-11-29 01:50:27,981 INFO L226 Difference]: Without dead ends: 1595 [2023-11-29 01:50:27,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1522 GetRequests, 1475 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=419, Invalid=1933, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 01:50:27,982 INFO L413 NwaCegarLoop]: 1717 mSDtfsCounter, 1540 mSDsluCounter, 23912 mSDsCounter, 0 mSdLazyCounter, 9190 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1569 SdHoareTripleChecker+Valid, 25629 SdHoareTripleChecker+Invalid, 9201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 9190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:50:27,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1569 Valid, 25629 Invalid, 9201 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11 Valid, 9190 Invalid, 0 Unknown, 0 Unchecked, 15.1s Time] [2023-11-29 01:50:27,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2023-11-29 01:50:28,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 1488. [2023-11-29 01:50:28,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1488 states, 1445 states have (on average 1.3231833910034603) internal successors, (1912), 1455 states have internal predecessors, (1912), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 01:50:28,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 1992 transitions. [2023-11-29 01:50:28,022 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 1992 transitions. Word has length 792 [2023-11-29 01:50:28,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:50:28,022 INFO L495 AbstractCegarLoop]: Abstraction has 1488 states and 1992 transitions. [2023-11-29 01:50:28,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 34.130434782608695) internal successors, (785), 23 states have internal predecessors, (785), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:50:28,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 1992 transitions. [2023-11-29 01:50:28,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 793 [2023-11-29 01:50:28,031 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:50:28,031 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:50:28,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 01:50:28,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 01:50:28,232 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:50:28,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:50:28,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1319024846, now seen corresponding path program 2 times [2023-11-29 01:50:28,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:50:28,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762146389] [2023-11-29 01:50:28,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:50:28,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:50:28,491 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:50:28,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [669255503] [2023-11-29 01:50:28,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:50:28,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:50:28,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:50:28,492 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:50:28,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 01:50:42,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:50:42,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:50:42,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 3783 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-29 01:50:42,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:50:42,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-29 01:50:42,891 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:50:42,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 24 [2023-11-29 01:50:43,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3412 backedges. 1861 proven. 914 refuted. 0 times theorem prover too weak. 637 trivial. 0 not checked. [2023-11-29 01:50:43,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:50:43,603 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:50:43,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 24 [2023-11-29 01:51:05,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:51:05,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762146389] [2023-11-29 01:51:05,456 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:51:05,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669255503] [2023-11-29 01:51:05,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669255503] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:51:05,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:51:05,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-11-29 01:51:05,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733038968] [2023-11-29 01:51:05,457 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:51:05,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 01:51:05,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:51:05,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 01:51:05,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2023-11-29 01:51:05,459 INFO L87 Difference]: Start difference. First operand 1488 states and 1992 transitions. Second operand has 18 states, 18 states have (on average 28.555555555555557) internal successors, (514), 18 states have internal predecessors, (514), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:51:14,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:51:15,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:51:15,291 INFO L93 Difference]: Finished difference Result 2227 states and 2991 transitions. [2023-11-29 01:51:15,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 01:51:15,292 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 28.555555555555557) internal successors, (514), 18 states have internal predecessors, (514), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 792 [2023-11-29 01:51:15,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:51:15,298 INFO L225 Difference]: With dead ends: 2227 [2023-11-29 01:51:15,298 INFO L226 Difference]: Without dead ends: 1481 [2023-11-29 01:51:15,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1522 GetRequests, 1484 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=286, Invalid=1274, Unknown=0, NotChecked=0, Total=1560 [2023-11-29 01:51:15,300 INFO L413 NwaCegarLoop]: 1039 mSDtfsCounter, 1074 mSDsluCounter, 9687 mSDsCounter, 0 mSdLazyCounter, 5009 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1091 SdHoareTripleChecker+Valid, 10726 SdHoareTripleChecker+Invalid, 5018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 5009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:51:15,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1091 Valid, 10726 Invalid, 5018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 5009 Invalid, 0 Unknown, 0 Unchecked, 9.4s Time] [2023-11-29 01:51:15,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2023-11-29 01:51:15,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1481. [2023-11-29 01:51:15,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1481 states, 1438 states have (on average 1.3226703755215576) internal successors, (1902), 1448 states have internal predecessors, (1902), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 01:51:15,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 1982 transitions. [2023-11-29 01:51:15,342 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 1982 transitions. Word has length 792 [2023-11-29 01:51:15,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:51:15,343 INFO L495 AbstractCegarLoop]: Abstraction has 1481 states and 1982 transitions. [2023-11-29 01:51:15,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 28.555555555555557) internal successors, (514), 18 states have internal predecessors, (514), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:51:15,343 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 1982 transitions. [2023-11-29 01:51:15,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 793 [2023-11-29 01:51:15,350 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:51:15,351 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:51:15,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 01:51:15,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 01:51:15,552 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:51:15,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:51:15,552 INFO L85 PathProgramCache]: Analyzing trace with hash -2014686734, now seen corresponding path program 3 times [2023-11-29 01:51:15,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:51:15,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385025548] [2023-11-29 01:51:15,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:51:15,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:51:15,805 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:51:15,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [179030675] [2023-11-29 01:51:15,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:51:15,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:51:15,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:51:15,806 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:51:15,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 01:51:17,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 01:51:17,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:51:17,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 01:51:17,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:51:17,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3418 backedges. 641 proven. 0 refuted. 0 times theorem prover too weak. 2777 trivial. 0 not checked. [2023-11-29 01:51:17,628 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:51:17,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:51:17,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385025548] [2023-11-29 01:51:17,629 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:51:17,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179030675] [2023-11-29 01:51:17,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179030675] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:51:17,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:51:17,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 01:51:17,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178446081] [2023-11-29 01:51:17,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:51:17,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:51:17,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:51:17,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:51:17,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:51:17,633 INFO L87 Difference]: Start difference. First operand 1481 states and 1982 transitions. Second operand has 7 states, 7 states have (on average 24.571428571428573) internal successors, (172), 7 states have internal predecessors, (172), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:51:18,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:51:18,069 INFO L93 Difference]: Finished difference Result 2966 states and 3987 transitions. [2023-11-29 01:51:18,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:51:18,070 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.571428571428573) internal successors, (172), 7 states have internal predecessors, (172), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 792 [2023-11-29 01:51:18,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:51:18,076 INFO L225 Difference]: With dead ends: 2966 [2023-11-29 01:51:18,077 INFO L226 Difference]: Without dead ends: 1541 [2023-11-29 01:51:18,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 792 GetRequests, 786 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:51:18,079 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 12 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:51:18,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 1000 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:51:18,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1541 states. [2023-11-29 01:51:18,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1541 to 1505. [2023-11-29 01:51:18,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1462 states have (on average 1.3214774281805746) internal successors, (1932), 1472 states have internal predecessors, (1932), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 01:51:18,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 2012 transitions. [2023-11-29 01:51:18,158 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 2012 transitions. Word has length 792 [2023-11-29 01:51:18,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:51:18,158 INFO L495 AbstractCegarLoop]: Abstraction has 1505 states and 2012 transitions. [2023-11-29 01:51:18,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.571428571428573) internal successors, (172), 7 states have internal predecessors, (172), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:51:18,158 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 2012 transitions. [2023-11-29 01:51:18,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 800 [2023-11-29 01:51:18,166 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:51:18,167 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:51:18,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 01:51:18,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 01:51:18,368 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:51:18,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:51:18,368 INFO L85 PathProgramCache]: Analyzing trace with hash 792440225, now seen corresponding path program 1 times [2023-11-29 01:51:18,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:51:18,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901680682] [2023-11-29 01:51:18,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:51:18,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:51:18,658 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:51:18,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1254540806] [2023-11-29 01:51:18,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:51:18,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:51:18,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:51:18,659 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:51:18,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 01:51:29,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:51:29,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 3802 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 01:51:29,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:51:29,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3439 backedges. 963 proven. 0 refuted. 0 times theorem prover too weak. 2476 trivial. 0 not checked. [2023-11-29 01:51:29,513 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:51:29,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:51:29,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901680682] [2023-11-29 01:51:29,513 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:51:29,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254540806] [2023-11-29 01:51:29,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254540806] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:51:29,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:51:29,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 01:51:29,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934399111] [2023-11-29 01:51:29,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:51:29,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:51:29,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:51:29,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:51:29,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:51:29,516 INFO L87 Difference]: Start difference. First operand 1505 states and 2012 transitions. Second operand has 7 states, 7 states have (on average 30.0) internal successors, (210), 7 states have internal predecessors, (210), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:51:29,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:51:29,853 INFO L93 Difference]: Finished difference Result 3014 states and 4047 transitions. [2023-11-29 01:51:29,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:51:29,853 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 30.0) internal successors, (210), 7 states have internal predecessors, (210), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 799 [2023-11-29 01:51:29,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:51:29,859 INFO L225 Difference]: With dead ends: 3014 [2023-11-29 01:51:29,859 INFO L226 Difference]: Without dead ends: 1565 [2023-11-29 01:51:29,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 799 GetRequests, 793 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:51:29,861 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 11 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:51:29,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 1006 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:51:29,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1565 states. [2023-11-29 01:51:29,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1565 to 1505. [2023-11-29 01:51:29,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1462 states have (on average 1.3214774281805746) internal successors, (1932), 1472 states have internal predecessors, (1932), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 01:51:29,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 2012 transitions. [2023-11-29 01:51:29,915 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 2012 transitions. Word has length 799 [2023-11-29 01:51:29,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:51:29,916 INFO L495 AbstractCegarLoop]: Abstraction has 1505 states and 2012 transitions. [2023-11-29 01:51:29,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 30.0) internal successors, (210), 7 states have internal predecessors, (210), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:51:29,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 2012 transitions. [2023-11-29 01:51:29,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 807 [2023-11-29 01:51:29,925 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:51:29,925 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:51:29,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 01:51:30,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:51:30,126 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:51:30,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:51:30,126 INFO L85 PathProgramCache]: Analyzing trace with hash 38068195, now seen corresponding path program 1 times [2023-11-29 01:51:30,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:51:30,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779475809] [2023-11-29 01:51:30,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:51:30,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:51:30,402 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:51:30,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1012892526] [2023-11-29 01:51:30,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:51:30,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:51:30,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:51:30,404 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:51:30,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 01:51:39,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:51:39,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 3795 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-29 01:51:39,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:51:39,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-29 01:51:40,079 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:51:40,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 24 [2023-11-29 01:51:40,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3460 backedges. 1747 proven. 1347 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2023-11-29 01:51:40,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:51:41,005 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:51:41,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 24 [2023-11-29 01:52:10,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:52:10,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779475809] [2023-11-29 01:52:10,117 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:52:10,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012892526] [2023-11-29 01:52:10,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012892526] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:52:10,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:52:10,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-11-29 01:52:10,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598051046] [2023-11-29 01:52:10,118 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:52:10,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 01:52:10,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:52:10,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 01:52:10,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 01:52:10,121 INFO L87 Difference]: Start difference. First operand 1505 states and 2012 transitions. Second operand has 20 states, 20 states have (on average 30.2) internal successors, (604), 20 states have internal predecessors, (604), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:52:22,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:52:24,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:52:24,980 INFO L93 Difference]: Finished difference Result 2106 states and 2825 transitions. [2023-11-29 01:52:24,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 01:52:24,981 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 30.2) internal successors, (604), 20 states have internal predecessors, (604), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 806 [2023-11-29 01:52:24,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:52:24,987 INFO L225 Difference]: With dead ends: 2106 [2023-11-29 01:52:24,987 INFO L226 Difference]: Without dead ends: 1502 [2023-11-29 01:52:24,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1550 GetRequests, 1509 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 01:52:24,989 INFO L413 NwaCegarLoop]: 1186 mSDtfsCounter, 974 mSDsluCounter, 14913 mSDsCounter, 0 mSdLazyCounter, 6805 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 994 SdHoareTripleChecker+Valid, 16099 SdHoareTripleChecker+Invalid, 6810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:52:24,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [994 Valid, 16099 Invalid, 6810 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5 Valid, 6805 Invalid, 0 Unknown, 0 Unchecked, 14.4s Time] [2023-11-29 01:52:24,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2023-11-29 01:52:25,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1502. [2023-11-29 01:52:25,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1502 states, 1459 states have (on average 1.3207676490747087) internal successors, (1927), 1469 states have internal predecessors, (1927), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 01:52:25,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1502 states to 1502 states and 2007 transitions. [2023-11-29 01:52:25,022 INFO L78 Accepts]: Start accepts. Automaton has 1502 states and 2007 transitions. Word has length 806 [2023-11-29 01:52:25,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:52:25,023 INFO L495 AbstractCegarLoop]: Abstraction has 1502 states and 2007 transitions. [2023-11-29 01:52:25,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 30.2) internal successors, (604), 20 states have internal predecessors, (604), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:52:25,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1502 states and 2007 transitions. [2023-11-29 01:52:25,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 809 [2023-11-29 01:52:25,030 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:52:25,030 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:52:25,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 01:52:25,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:52:25,231 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:52:25,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:52:25,231 INFO L85 PathProgramCache]: Analyzing trace with hash -723431068, now seen corresponding path program 2 times [2023-11-29 01:52:25,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:52:25,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134201762] [2023-11-29 01:52:25,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:52:25,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:52:25,497 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:52:25,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [902077255] [2023-11-29 01:52:25,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:52:25,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:52:25,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:52:25,498 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:52:25,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 01:53:03,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:53:03,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:53:03,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 3795 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-29 01:53:03,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:53:04,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-29 01:53:04,625 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:53:04,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 24 [2023-11-29 01:53:04,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3484 backedges. 1011 proven. 2426 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-11-29 01:53:04,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:53:05,420 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:53:05,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 24 [2023-11-29 01:53:42,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:53:42,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134201762] [2023-11-29 01:53:42,739 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:53:42,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902077255] [2023-11-29 01:53:42,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902077255] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:53:42,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:53:42,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-11-29 01:53:42,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953322151] [2023-11-29 01:53:42,740 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:53:42,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 01:53:42,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:53:42,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 01:53:42,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1263, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 01:53:42,743 INFO L87 Difference]: Start difference. First operand 1502 states and 2007 transitions. Second operand has 22 states, 22 states have (on average 34.59090909090909) internal successors, (761), 22 states have internal predecessors, (761), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:53:53,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 01:54:00,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:54:00,231 INFO L93 Difference]: Finished difference Result 1814 states and 2433 transitions. [2023-11-29 01:54:00,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 01:54:00,232 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 34.59090909090909) internal successors, (761), 22 states have internal predecessors, (761), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 808 [2023-11-29 01:54:00,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:54:00,238 INFO L225 Difference]: With dead ends: 1814 [2023-11-29 01:54:00,239 INFO L226 Difference]: Without dead ends: 1499 [2023-11-29 01:54:00,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1554 GetRequests, 1509 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=385, Invalid=1777, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 01:54:00,240 INFO L413 NwaCegarLoop]: 1538 mSDtfsCounter, 1332 mSDsluCounter, 21130 mSDsCounter, 0 mSdLazyCounter, 8515 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1358 SdHoareTripleChecker+Valid, 22668 SdHoareTripleChecker+Invalid, 8524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 8515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:54:00,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1358 Valid, 22668 Invalid, 8524 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [9 Valid, 8515 Invalid, 0 Unknown, 0 Unchecked, 17.0s Time] [2023-11-29 01:54:00,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1499 states. [2023-11-29 01:54:00,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1499 to 1499. [2023-11-29 01:54:00,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1456 states have (on average 1.320054945054945) internal successors, (1922), 1466 states have internal predecessors, (1922), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 01:54:00,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 2002 transitions. [2023-11-29 01:54:00,271 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 2002 transitions. Word has length 808 [2023-11-29 01:54:00,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:54:00,272 INFO L495 AbstractCegarLoop]: Abstraction has 1499 states and 2002 transitions. [2023-11-29 01:54:00,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 34.59090909090909) internal successors, (761), 22 states have internal predecessors, (761), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:54:00,272 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 2002 transitions. [2023-11-29 01:54:00,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 811 [2023-11-29 01:54:00,278 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:54:00,279 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:54:00,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 01:54:00,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:54:00,480 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:54:00,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:54:00,480 INFO L85 PathProgramCache]: Analyzing trace with hash -591292827, now seen corresponding path program 3 times [2023-11-29 01:54:00,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:54:00,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211975002] [2023-11-29 01:54:00,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:54:00,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:54:00,755 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:54:00,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2105738213] [2023-11-29 01:54:00,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:54:00,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:54:00,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:54:00,756 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:54:00,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 01:54:02,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 01:54:02,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:54:02,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 01:54:02,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:54:02,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3514 backedges. 411 proven. 0 refuted. 0 times theorem prover too weak. 3103 trivial. 0 not checked. [2023-11-29 01:54:02,512 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:54:02,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:54:02,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211975002] [2023-11-29 01:54:02,512 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:54:02,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105738213] [2023-11-29 01:54:02,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105738213] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:54:02,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:54:02,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:54:02,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413331507] [2023-11-29 01:54:02,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:54:02,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:54:02,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:54:02,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:54:02,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:54:02,514 INFO L87 Difference]: Start difference. First operand 1499 states and 2002 transitions. Second operand has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:54:02,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:54:02,595 INFO L93 Difference]: Finished difference Result 2999 states and 4007 transitions. [2023-11-29 01:54:02,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:54:02,596 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 810 [2023-11-29 01:54:02,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:54:02,600 INFO L225 Difference]: With dead ends: 2999 [2023-11-29 01:54:02,600 INFO L226 Difference]: Without dead ends: 1549 [2023-11-29 01:54:02,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 809 GetRequests, 807 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:54:02,602 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 6 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:54:02,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 650 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:54:02,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1549 states. [2023-11-29 01:54:02,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1549 to 1489. [2023-11-29 01:54:02,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1489 states, 1446 states have (on average 1.3153526970954357) internal successors, (1902), 1456 states have internal predecessors, (1902), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 01:54:02,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1489 states to 1489 states and 1982 transitions. [2023-11-29 01:54:02,634 INFO L78 Accepts]: Start accepts. Automaton has 1489 states and 1982 transitions. Word has length 810 [2023-11-29 01:54:02,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:54:02,634 INFO L495 AbstractCegarLoop]: Abstraction has 1489 states and 1982 transitions. [2023-11-29 01:54:02,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:54:02,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1489 states and 1982 transitions. [2023-11-29 01:54:02,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 811 [2023-11-29 01:54:02,641 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:54:02,641 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:54:02,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 01:54:02,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:54:02,842 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:54:02,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:54:02,842 INFO L85 PathProgramCache]: Analyzing trace with hash -668494689, now seen corresponding path program 1 times [2023-11-29 01:54:02,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:54:02,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833788303] [2023-11-29 01:54:02,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:54:02,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:54:03,120 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:54:03,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1669072938] [2023-11-29 01:54:03,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:54:03,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:54:03,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:54:03,122 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:54:03,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 01:54:23,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:54:23,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 3795 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 01:54:23,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:54:25,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3532 backedges. 1531 proven. 0 refuted. 0 times theorem prover too weak. 2001 trivial. 0 not checked. [2023-11-29 01:54:25,639 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:54:25,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:54:25,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833788303] [2023-11-29 01:54:25,639 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:54:25,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669072938] [2023-11-29 01:54:25,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669072938] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:54:25,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:54:25,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 01:54:25,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092879536] [2023-11-29 01:54:25,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:54:25,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 01:54:25,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:54:25,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 01:54:25,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-11-29 01:54:25,641 INFO L87 Difference]: Start difference. First operand 1489 states and 1982 transitions. Second operand has 11 states, 11 states have (on average 19.636363636363637) internal successors, (216), 11 states have internal predecessors, (216), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:54:26,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:54:26,736 INFO L93 Difference]: Finished difference Result 2973 states and 3958 transitions. [2023-11-29 01:54:26,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:54:26,736 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 19.636363636363637) internal successors, (216), 11 states have internal predecessors, (216), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 810 [2023-11-29 01:54:26,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:54:26,740 INFO L225 Difference]: With dead ends: 2973 [2023-11-29 01:54:26,740 INFO L226 Difference]: Without dead ends: 1539 [2023-11-29 01:54:26,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 810 GetRequests, 800 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-11-29 01:54:26,742 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 10 mSDsluCounter, 1396 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1608 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:54:26,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 1608 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 01:54:26,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2023-11-29 01:54:26,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 1519. [2023-11-29 01:54:26,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1476 states have (on average 1.3089430894308942) internal successors, (1932), 1486 states have internal predecessors, (1932), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 01:54:26,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 2012 transitions. [2023-11-29 01:54:26,773 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 2012 transitions. Word has length 810 [2023-11-29 01:54:26,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:54:26,773 INFO L495 AbstractCegarLoop]: Abstraction has 1519 states and 2012 transitions. [2023-11-29 01:54:26,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 19.636363636363637) internal successors, (216), 11 states have internal predecessors, (216), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:54:26,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 2012 transitions. [2023-11-29 01:54:26,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 811 [2023-11-29 01:54:26,780 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:54:26,780 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:54:26,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 01:54:26,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:54:26,981 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:54:26,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:54:26,981 INFO L85 PathProgramCache]: Analyzing trace with hash 89310823, now seen corresponding path program 1 times [2023-11-29 01:54:26,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:54:26,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647897419] [2023-11-29 01:54:26,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:54:26,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:54:27,262 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:54:27,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1133361864] [2023-11-29 01:54:27,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:54:27,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:54:27,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:54:27,263 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:54:27,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 01:54:44,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:54:44,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 3775 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-29 01:54:44,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:54:44,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-29 01:54:44,708 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:54:44,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 23 [2023-11-29 01:54:44,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3532 backedges. 289 proven. 0 refuted. 0 times theorem prover too weak. 3243 trivial. 0 not checked. [2023-11-29 01:54:44,817 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:54:44,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:54:44,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647897419] [2023-11-29 01:54:44,817 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:54:44,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133361864] [2023-11-29 01:54:44,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133361864] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:54:44,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:54:44,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 01:54:44,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210964511] [2023-11-29 01:54:44,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:54:44,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 01:54:44,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:54:44,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 01:54:44,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-11-29 01:54:44,820 INFO L87 Difference]: Start difference. First operand 1519 states and 2012 transitions. Second operand has 12 states, 12 states have (on average 10.75) internal successors, (129), 11 states have internal predecessors, (129), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:54:46,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:54:46,909 INFO L93 Difference]: Finished difference Result 2991 states and 3971 transitions. [2023-11-29 01:54:46,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 01:54:46,910 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 10.75) internal successors, (129), 11 states have internal predecessors, (129), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 810 [2023-11-29 01:54:46,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:54:46,913 INFO L225 Difference]: With dead ends: 2991 [2023-11-29 01:54:46,913 INFO L226 Difference]: Without dead ends: 1516 [2023-11-29 01:54:46,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 816 GetRequests, 799 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-11-29 01:54:46,915 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 431 mSDsluCounter, 1487 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 1718 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-29 01:54:46,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 1718 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-29 01:54:46,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2023-11-29 01:54:46,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1516. [2023-11-29 01:54:46,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1516 states, 1473 states have (on average 1.308214528173795) internal successors, (1927), 1483 states have internal predecessors, (1927), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 01:54:46,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 2007 transitions. [2023-11-29 01:54:46,950 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 2007 transitions. Word has length 810 [2023-11-29 01:54:46,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:54:46,950 INFO L495 AbstractCegarLoop]: Abstraction has 1516 states and 2007 transitions. [2023-11-29 01:54:46,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.75) internal successors, (129), 11 states have internal predecessors, (129), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:54:46,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 2007 transitions. [2023-11-29 01:54:46,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 813 [2023-11-29 01:54:46,957 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:54:46,957 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:54:47,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 01:54:47,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:54:47,158 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:54:47,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:54:47,158 INFO L85 PathProgramCache]: Analyzing trace with hash 953985600, now seen corresponding path program 1 times [2023-11-29 01:54:47,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:54:47,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695720078] [2023-11-29 01:54:47,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:54:47,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:54:47,457 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:54:47,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [841561206] [2023-11-29 01:54:47,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:54:47,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:54:47,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:54:47,458 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:54:47,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 01:55:23,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:55:23,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 3775 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 01:55:23,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:55:23,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3550 backedges. 534 proven. 0 refuted. 0 times theorem prover too weak. 3016 trivial. 0 not checked. [2023-11-29 01:55:23,256 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:55:23,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:23,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695720078] [2023-11-29 01:55:23,257 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:55:23,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841561206] [2023-11-29 01:55:23,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841561206] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:55:23,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:55:23,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:55:23,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99281643] [2023-11-29 01:55:23,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:55:23,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:55:23,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:23,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:55:23,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:55:23,260 INFO L87 Difference]: Start difference. First operand 1516 states and 2007 transitions. Second operand has 4 states, 3 states have (on average 52.333333333333336) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:55:23,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:55:23,308 INFO L93 Difference]: Finished difference Result 2945 states and 3930 transitions. [2023-11-29 01:55:23,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:55:23,308 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 52.333333333333336) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 812 [2023-11-29 01:55:23,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:55:23,313 INFO L225 Difference]: With dead ends: 2945 [2023-11-29 01:55:23,314 INFO L226 Difference]: Without dead ends: 1518 [2023-11-29 01:55:23,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 812 GetRequests, 809 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:55:23,316 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 1 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:55:23,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 680 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:55:23,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2023-11-29 01:55:23,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 1518. [2023-11-29 01:55:23,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1474 states have (on average 1.308683853459973) internal successors, (1929), 1485 states have internal predecessors, (1929), 40 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (50), 31 states have call predecessors, (50), 40 states have call successors, (50) [2023-11-29 01:55:23,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 2019 transitions. [2023-11-29 01:55:23,358 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 2019 transitions. Word has length 812 [2023-11-29 01:55:23,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:55:23,358 INFO L495 AbstractCegarLoop]: Abstraction has 1518 states and 2019 transitions. [2023-11-29 01:55:23,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 52.333333333333336) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:55:23,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 2019 transitions. [2023-11-29 01:55:23,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 815 [2023-11-29 01:55:23,365 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:55:23,365 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:55:23,425 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 01:55:23,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 01:55:23,566 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:55:23,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:23,566 INFO L85 PathProgramCache]: Analyzing trace with hash -176131174, now seen corresponding path program 1 times [2023-11-29 01:55:23,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:23,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474383466] [2023-11-29 01:55:23,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:23,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:23,870 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:55:23,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [962608186] [2023-11-29 01:55:23,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:23,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:55:23,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:55:23,871 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:55:23,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23289e2c-b733-450a-b9af-ad8435d73a46/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 01:56:36,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:56:36,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 3805 conjuncts, 129 conjunts are in the unsatisfiable core [2023-11-29 01:56:36,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:56:36,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-29 01:56:36,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-29 01:56:36,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-29 01:56:36,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:56:36,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:56:36,347 INFO L349 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2023-11-29 01:56:36,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2023-11-29 01:56:36,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2023-11-29 01:56:36,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-29 01:56:36,525 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-29 01:56:36,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2023-11-29 01:56:36,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-11-29 01:56:41,372 INFO L224 Elim1Store]: Index analysis took 179 ms