./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB --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 1af9610c3f2ac44e456633c84d2e8d0495857443026005d5daf994731366c726 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 04:49:28,374 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:49:28,443 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 04:49:28,449 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:49:28,450 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:49:28,477 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:49:28,478 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:49:28,478 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:49:28,479 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:49:28,479 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:49:28,479 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:49:28,479 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:49:28,480 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:49:28,480 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:49:28,480 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:49:28,480 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:49:28,480 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 04:49:28,481 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 04:49:28,481 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 04:49:28,481 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 04:49:28,481 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:49:28,481 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 04:49:28,481 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:49:28,482 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 04:49:28,482 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 04:49:28,482 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 04:49:28,482 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:49:28,482 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:49:28,482 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:49:28,482 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:49:28,483 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:49:28,483 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:49:28,483 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:49:28,483 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:49:28,483 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:49:28,483 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:49:28,484 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:49:28,484 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:49:28,484 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:49:28,484 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:49:28,484 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 04:49:28,484 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 04:49:28,485 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 04:49:28,485 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 04:49:28,485 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:49:28,485 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:49:28,485 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:49:28,485 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:49:28,485 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB 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 -> 1af9610c3f2ac44e456633c84d2e8d0495857443026005d5daf994731366c726 [2024-11-28 04:49:28,793 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:49:28,803 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:49:28,805 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:49:28,807 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:49:28,807 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:49:28,809 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c [2024-11-28 04:49:31,889 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/data/dd8fa75f2/83ee0690777a4b57b02098509cf2a533/FLAG1994e8403 [2024-11-28 04:49:32,275 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:49:32,276 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c [2024-11-28 04:49:32,299 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/data/dd8fa75f2/83ee0690777a4b57b02098509cf2a533/FLAG1994e8403 [2024-11-28 04:49:32,479 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/data/dd8fa75f2/83ee0690777a4b57b02098509cf2a533 [2024-11-28 04:49:32,482 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:49:32,485 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:49:32,488 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:49:32,489 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:49:32,495 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:49:32,495 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:49:32" (1/1) ... [2024-11-28 04:49:32,499 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6415d146 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:49:32, skipping insertion in model container [2024-11-28 04:49:32,499 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:49:32" (1/1) ... [2024-11-28 04:49:32,517 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:49:32,696 WARN L250 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_20f7d84f-2489-4c5a-87cf-e64420f908b9/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c[490,503] [2024-11-28 04:49:32,734 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:49:32,745 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 04:49:32,758 WARN L250 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_20f7d84f-2489-4c5a-87cf-e64420f908b9/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c[490,503] [2024-11-28 04:49:32,777 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:49:32,799 INFO L204 MainTranslator]: Completed translation [2024-11-28 04:49:32,800 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:49:32 WrapperNode [2024-11-28 04:49:32,800 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:49:32,802 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 04:49:32,803 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 04:49:32,803 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 04:49:32,815 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:49:32" (1/1) ... [2024-11-28 04:49:32,822 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:49:32" (1/1) ... [2024-11-28 04:49:32,841 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2024-11-28 04:49:32,841 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 04:49:32,842 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 04:49:32,842 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 04:49:32,842 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 04:49:32,852 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:49:32" (1/1) ... [2024-11-28 04:49:32,852 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:49:32" (1/1) ... [2024-11-28 04:49:32,854 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:49:32" (1/1) ... [2024-11-28 04:49:32,876 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-28 04:49:32,879 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:49:32" (1/1) ... [2024-11-28 04:49:32,879 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:49:32" (1/1) ... [2024-11-28 04:49:32,883 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:49:32" (1/1) ... [2024-11-28 04:49:32,884 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:49:32" (1/1) ... [2024-11-28 04:49:32,890 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:49:32" (1/1) ... [2024-11-28 04:49:32,894 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:49:32" (1/1) ... [2024-11-28 04:49:32,895 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:49:32" (1/1) ... [2024-11-28 04:49:32,900 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 04:49:32,901 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 04:49:32,901 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 04:49:32,901 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 04:49:32,903 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:49:32" (1/1) ... [2024-11-28 04:49:32,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:49:32,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:49:32,944 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 04:49:32,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 04:49:32,983 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 04:49:32,983 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-28 04:49:32,983 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-28 04:49:32,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 04:49:32,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 04:49:32,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 04:49:32,984 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-28 04:49:32,984 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-28 04:49:33,058 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 04:49:33,060 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 04:49:33,261 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-28 04:49:33,261 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 04:49:33,280 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 04:49:33,280 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-28 04:49:33,281 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:49:33 BoogieIcfgContainer [2024-11-28 04:49:33,281 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 04:49:33,284 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 04:49:33,284 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 04:49:33,289 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 04:49:33,290 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:49:32" (1/3) ... [2024-11-28 04:49:33,290 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d846928 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:49:33, skipping insertion in model container [2024-11-28 04:49:33,291 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:49:32" (2/3) ... [2024-11-28 04:49:33,291 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d846928 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:49:33, skipping insertion in model container [2024-11-28 04:49:33,291 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:49:33" (3/3) ... [2024-11-28 04:49:33,292 INFO L128 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound10.c [2024-11-28 04:49:33,310 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 04:49:33,312 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG egcd2-ll_valuebound10.c that has 3 procedures, 33 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-28 04:49:33,372 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 04:49:33,384 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@351f95e4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 04:49:33,384 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-28 04:49:33,389 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-28 04:49:33,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-28 04:49:33,396 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:49:33,397 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:49:33,397 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:49:33,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:49:33,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1694190779, now seen corresponding path program 1 times [2024-11-28 04:49:33,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:49:33,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978701432] [2024-11-28 04:49:33,413 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:49:33,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:49:33,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:49:33,611 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-28 04:49:33,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:49:33,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978701432] [2024-11-28 04:49:33,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978701432] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:49:33,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597107239] [2024-11-28 04:49:33,613 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:49:33,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:49:33,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:49:33,617 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:49:33,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 04:49:33,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:49:33,748 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-28 04:49:33,754 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:49:33,768 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-28 04:49:33,769 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:49:33,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597107239] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:49:33,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:49:33,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-11-28 04:49:33,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775252246] [2024-11-28 04:49:33,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:49:33,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-28 04:49:33,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:49:33,799 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-28 04:49:33,800 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 04:49:33,802 INFO L87 Difference]: Start difference. First operand has 33 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-28 04:49:33,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:49:33,824 INFO L93 Difference]: Finished difference Result 63 states and 108 transitions. [2024-11-28 04:49:33,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-28 04:49:33,830 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2024-11-28 04:49:33,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:49:33,837 INFO L225 Difference]: With dead ends: 63 [2024-11-28 04:49:33,837 INFO L226 Difference]: Without dead ends: 29 [2024-11-28 04:49:33,841 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 04:49:33,844 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:49:33,845 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:49:33,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-28 04:49:33,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-28 04:49:33,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 16 states have internal predecessors, (17), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-28 04:49:33,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2024-11-28 04:49:33,884 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 39 [2024-11-28 04:49:33,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:49:33,884 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2024-11-28 04:49:33,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-28 04:49:33,885 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2024-11-28 04:49:33,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-28 04:49:33,886 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:49:33,886 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:49:33,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 04:49:34,087 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-28 04:49:34,087 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:49:34,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:49:34,088 INFO L85 PathProgramCache]: Analyzing trace with hash -979027133, now seen corresponding path program 1 times [2024-11-28 04:49:34,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:49:34,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735729210] [2024-11-28 04:49:34,088 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:49:34,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:49:34,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:49:34,529 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:49:34,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:49:34,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735729210] [2024-11-28 04:49:34,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735729210] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:49:34,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655678316] [2024-11-28 04:49:34,530 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:49:34,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:49:34,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:49:34,538 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:49:34,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 04:49:34,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:49:34,612 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 04:49:34,615 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:49:34,974 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:49:34,976 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:49:35,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655678316] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:49:35,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:49:35,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 11 [2024-11-28 04:49:35,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252173434] [2024-11-28 04:49:35,196 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:49:35,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 04:49:35,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:49:35,198 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 04:49:35,198 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-11-28 04:49:35,199 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand has 11 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-28 04:49:35,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:49:35,594 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2024-11-28 04:49:35,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 04:49:35,595 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 39 [2024-11-28 04:49:35,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:49:35,597 INFO L225 Difference]: With dead ends: 48 [2024-11-28 04:49:35,597 INFO L226 Difference]: Without dead ends: 40 [2024-11-28 04:49:35,598 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-11-28 04:49:35,599 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 24 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:49:35,599 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 178 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:49:35,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-28 04:49:35,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2024-11-28 04:49:35,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-28 04:49:35,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 54 transitions. [2024-11-28 04:49:35,629 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 54 transitions. Word has length 39 [2024-11-28 04:49:35,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:49:35,631 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 54 transitions. [2024-11-28 04:49:35,632 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-28 04:49:35,632 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 54 transitions. [2024-11-28 04:49:35,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-28 04:49:35,633 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:49:35,633 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:49:35,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 04:49:35,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2024-11-28 04:49:35,834 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:49:35,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:49:35,834 INFO L85 PathProgramCache]: Analyzing trace with hash -977418419, now seen corresponding path program 1 times [2024-11-28 04:49:35,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:49:35,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345974239] [2024-11-28 04:49:35,835 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:49:35,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:49:35,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:49:35,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2044978402] [2024-11-28 04:49:35,868 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:49:35,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:49:35,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:49:35,871 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:49:35,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 04:49:35,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:49:35,928 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 04:49:35,930 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:49:35,975 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-28 04:49:35,976 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:49:35,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:49:35,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345974239] [2024-11-28 04:49:35,977 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:49:35,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044978402] [2024-11-28 04:49:35,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044978402] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:49:35,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:49:35,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:49:35,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880225982] [2024-11-28 04:49:35,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:49:35,978 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:49:35,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:49:35,978 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:49:35,978 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:49:35,979 INFO L87 Difference]: Start difference. First operand 39 states and 54 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-28 04:49:36,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:49:36,056 INFO L93 Difference]: Finished difference Result 56 states and 80 transitions. [2024-11-28 04:49:36,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:49:36,056 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2024-11-28 04:49:36,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:49:36,058 INFO L225 Difference]: With dead ends: 56 [2024-11-28 04:49:36,058 INFO L226 Difference]: Without dead ends: 54 [2024-11-28 04:49:36,058 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:49:36,059 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:49:36,060 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 128 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:49:36,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-28 04:49:36,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2024-11-28 04:49:36,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 25 states have internal predecessors, (26), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-28 04:49:36,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2024-11-28 04:49:36,075 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 39 [2024-11-28 04:49:36,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:49:36,076 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2024-11-28 04:49:36,076 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-28 04:49:36,076 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2024-11-28 04:49:36,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-28 04:49:36,077 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:49:36,077 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2024-11-28 04:49:36,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 04:49:36,281 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:49:36,282 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:49:36,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:49:36,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1981253298, now seen corresponding path program 1 times [2024-11-28 04:49:36,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:49:36,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21373439] [2024-11-28 04:49:36,282 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:49:36,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:49:36,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:49:36,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1330064870] [2024-11-28 04:49:36,305 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:49:36,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:49:36,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:49:36,307 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:49:36,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 04:49:36,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:49:36,380 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 04:49:36,382 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:49:36,490 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-28 04:49:36,490 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:49:36,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:49:36,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21373439] [2024-11-28 04:49:36,491 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:49:36,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330064870] [2024-11-28 04:49:36,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330064870] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:49:36,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:49:36,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:49:36,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987009497] [2024-11-28 04:49:36,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:49:36,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:49:36,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:49:36,492 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:49:36,493 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:49:36,493 INFO L87 Difference]: Start difference. First operand 45 states and 61 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 04:49:36,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:49:36,579 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2024-11-28 04:49:36,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:49:36,580 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2024-11-28 04:49:36,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:49:36,583 INFO L225 Difference]: With dead ends: 52 [2024-11-28 04:49:36,583 INFO L226 Difference]: Without dead ends: 50 [2024-11-28 04:49:36,583 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:49:36,584 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:49:36,584 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 138 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:49:36,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-28 04:49:36,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2024-11-28 04:49:36,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 25 states have (on average 1.16) internal successors, (29), 28 states have internal predecessors, (29), 18 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-28 04:49:36,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 64 transitions. [2024-11-28 04:49:36,599 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 64 transitions. Word has length 44 [2024-11-28 04:49:36,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:49:36,600 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 64 transitions. [2024-11-28 04:49:36,600 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 04:49:36,600 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 64 transitions. [2024-11-28 04:49:36,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-28 04:49:36,602 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:49:36,602 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 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] [2024-11-28 04:49:36,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 04:49:36,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:49:36,803 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:49:36,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:49:36,803 INFO L85 PathProgramCache]: Analyzing trace with hash -178384046, now seen corresponding path program 1 times [2024-11-28 04:49:36,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:49:36,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563471650] [2024-11-28 04:49:36,803 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:49:36,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:49:36,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:49:36,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1043766128] [2024-11-28 04:49:36,866 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:49:36,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:49:36,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:49:36,871 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:49:36,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 04:49:36,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:49:36,947 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 04:49:36,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:49:37,117 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-28 04:49:37,117 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:49:37,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:49:37,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563471650] [2024-11-28 04:49:37,118 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:49:37,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043766128] [2024-11-28 04:49:37,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043766128] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:49:37,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:49:37,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:49:37,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500509810] [2024-11-28 04:49:37,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:49:37,118 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:49:37,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:49:37,119 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:49:37,119 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:49:37,119 INFO L87 Difference]: Start difference. First operand 49 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-28 04:49:37,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:49:37,214 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2024-11-28 04:49:37,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:49:37,214 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 54 [2024-11-28 04:49:37,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:49:37,216 INFO L225 Difference]: With dead ends: 56 [2024-11-28 04:49:37,216 INFO L226 Difference]: Without dead ends: 54 [2024-11-28 04:49:37,216 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:49:37,217 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 5 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:49:37,217 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 125 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:49:37,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-28 04:49:37,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2024-11-28 04:49:37,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-28 04:49:37,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2024-11-28 04:49:37,244 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 54 [2024-11-28 04:49:37,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:49:37,244 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2024-11-28 04:49:37,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-28 04:49:37,245 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2024-11-28 04:49:37,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-28 04:49:37,247 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:49:37,248 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 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] [2024-11-28 04:49:37,257 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 04:49:37,448 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:49:37,448 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:49:37,449 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:49:37,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1371475927, now seen corresponding path program 1 times [2024-11-28 04:49:37,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:49:37,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587203962] [2024-11-28 04:49:37,449 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:49:37,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:49:37,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:49:37,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [242859674] [2024-11-28 04:49:37,490 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:49:37,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:49:37,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:49:37,492 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:49:37,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 04:49:37,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:49:37,555 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 04:49:37,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:49:37,629 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-28 04:49:37,630 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:49:37,766 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-28 04:49:37,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:49:37,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587203962] [2024-11-28 04:49:37,766 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:49:37,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242859674] [2024-11-28 04:49:37,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242859674] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:49:37,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:49:37,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2024-11-28 04:49:37,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502851776] [2024-11-28 04:49:37,767 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:49:37,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 04:49:37,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:49:37,767 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 04:49:37,768 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:49:37,768 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand has 7 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-28 04:49:37,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:49:37,890 INFO L93 Difference]: Finished difference Result 79 states and 110 transitions. [2024-11-28 04:49:37,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 04:49:37,891 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2024-11-28 04:49:37,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:49:37,893 INFO L225 Difference]: With dead ends: 79 [2024-11-28 04:49:37,893 INFO L226 Difference]: Without dead ends: 77 [2024-11-28 04:49:37,894 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:49:37,894 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:49:37,895 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 144 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:49:37,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-28 04:49:37,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 51. [2024-11-28 04:49:37,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-28 04:49:37,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2024-11-28 04:49:37,921 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 60 [2024-11-28 04:49:37,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:49:37,921 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2024-11-28 04:49:37,922 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-28 04:49:37,922 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2024-11-28 04:49:37,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-28 04:49:37,922 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:49:37,923 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 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] [2024-11-28 04:49:37,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-28 04:49:38,128 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:49:38,129 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:49:38,129 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:49:38,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1875725832, now seen corresponding path program 1 times [2024-11-28 04:49:38,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:49:38,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903280164] [2024-11-28 04:49:38,130 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:49:38,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:49:38,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:49:38,477 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-11-28 04:49:38,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:49:38,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903280164] [2024-11-28 04:49:38,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903280164] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:49:38,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204888470] [2024-11-28 04:49:38,477 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:49:38,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:49:38,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:49:38,482 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:49:38,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 04:49:38,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:49:38,549 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 04:49:38,551 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:49:38,631 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-11-28 04:49:38,632 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:49:38,779 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-11-28 04:49:38,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204888470] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:49:38,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:49:38,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2024-11-28 04:49:38,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327407999] [2024-11-28 04:49:38,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:49:38,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 04:49:38,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:49:38,781 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 04:49:38,781 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-28 04:49:38,781 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2024-11-28 04:49:39,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:49:39,074 INFO L93 Difference]: Finished difference Result 91 states and 131 transitions. [2024-11-28 04:49:39,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 04:49:39,075 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 62 [2024-11-28 04:49:39,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:49:39,078 INFO L225 Difference]: With dead ends: 91 [2024-11-28 04:49:39,078 INFO L226 Difference]: Without dead ends: 83 [2024-11-28 04:49:39,078 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 116 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-11-28 04:49:39,079 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 20 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:49:39,082 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 298 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:49:39,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-28 04:49:39,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 75. [2024-11-28 04:49:39,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 36 states have (on average 1.25) internal successors, (45), 37 states have internal predecessors, (45), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2024-11-28 04:49:39,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 108 transitions. [2024-11-28 04:49:39,111 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 108 transitions. Word has length 62 [2024-11-28 04:49:39,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:49:39,111 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 108 transitions. [2024-11-28 04:49:39,111 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2024-11-28 04:49:39,112 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 108 transitions. [2024-11-28 04:49:39,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-28 04:49:39,112 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:49:39,113 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 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, 1, 1, 1, 1] [2024-11-28 04:49:39,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 04:49:39,316 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-28 04:49:39,317 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:49:39,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:49:39,317 INFO L85 PathProgramCache]: Analyzing trace with hash -329947379, now seen corresponding path program 1 times [2024-11-28 04:49:39,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:49:39,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820660446] [2024-11-28 04:49:39,318 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:49:39,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:49:39,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:49:39,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1086645492] [2024-11-28 04:49:39,358 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:49:39,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:49:39,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:49:39,364 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:49:39,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 04:49:39,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:49:39,434 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-28 04:49:39,437 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:49:39,569 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-28 04:49:39,569 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:49:39,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:49:39,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820660446] [2024-11-28 04:49:39,620 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:49:39,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086645492] [2024-11-28 04:49:39,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086645492] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:49:39,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:49:39,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2024-11-28 04:49:39,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535796668] [2024-11-28 04:49:39,621 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 04:49:39,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 04:49:39,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:49:39,622 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 04:49:39,622 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:49:39,622 INFO L87 Difference]: Start difference. First operand 75 states and 108 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-28 04:49:39,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:49:39,784 INFO L93 Difference]: Finished difference Result 105 states and 154 transitions. [2024-11-28 04:49:39,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:49:39,784 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 67 [2024-11-28 04:49:39,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:49:39,789 INFO L225 Difference]: With dead ends: 105 [2024-11-28 04:49:39,789 INFO L226 Difference]: Without dead ends: 102 [2024-11-28 04:49:39,789 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:49:39,790 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 7 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:49:39,790 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 182 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:49:39,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-28 04:49:39,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2024-11-28 04:49:39,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 48 states have internal predecessors, (59), 45 states have call successors, (45), 7 states have call predecessors, (45), 7 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2024-11-28 04:49:39,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 147 transitions. [2024-11-28 04:49:39,842 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 147 transitions. Word has length 67 [2024-11-28 04:49:39,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:49:39,843 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 147 transitions. [2024-11-28 04:49:39,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-28 04:49:39,843 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 147 transitions. [2024-11-28 04:49:39,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-28 04:49:39,844 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:49:39,845 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 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, 1, 1] [2024-11-28 04:49:39,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-28 04:49:40,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-28 04:49:40,045 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:49:40,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:49:40,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1881855666, now seen corresponding path program 2 times [2024-11-28 04:49:40,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:49:40,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493876576] [2024-11-28 04:49:40,046 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:49:40,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:49:40,071 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:49:40,071 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:49:40,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [789389617] [2024-11-28 04:49:40,072 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:49:40,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:49:40,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:49:40,075 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:49:40,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 04:49:40,150 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:49:40,151 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:49:40,152 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 04:49:40,156 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:49:40,373 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-28 04:49:40,373 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:49:40,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:49:40,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493876576] [2024-11-28 04:49:40,424 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:49:40,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789389617] [2024-11-28 04:49:40,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789389617] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:49:40,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:49:40,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2024-11-28 04:49:40,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768513091] [2024-11-28 04:49:40,424 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 04:49:40,425 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 04:49:40,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:49:40,425 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 04:49:40,426 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:49:40,426 INFO L87 Difference]: Start difference. First operand 99 states and 147 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-28 04:49:40,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:49:40,629 INFO L93 Difference]: Finished difference Result 111 states and 157 transitions. [2024-11-28 04:49:40,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 04:49:40,630 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 72 [2024-11-28 04:49:40,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:49:40,632 INFO L225 Difference]: With dead ends: 111 [2024-11-28 04:49:40,632 INFO L226 Difference]: Without dead ends: 109 [2024-11-28 04:49:40,632 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-28 04:49:40,633 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 10 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:49:40,633 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 196 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:49:40,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-11-28 04:49:40,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2024-11-28 04:49:40,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 52 states have (on average 1.25) internal successors, (65), 54 states have internal predecessors, (65), 45 states have call successors, (45), 9 states have call predecessors, (45), 9 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2024-11-28 04:49:40,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 153 transitions. [2024-11-28 04:49:40,676 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 153 transitions. Word has length 72 [2024-11-28 04:49:40,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:49:40,676 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 153 transitions. [2024-11-28 04:49:40,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-28 04:49:40,677 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 153 transitions. [2024-11-28 04:49:40,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-28 04:49:40,678 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:49:40,678 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 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] [2024-11-28 04:49:40,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-28 04:49:40,879 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:49:40,879 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:49:40,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:49:40,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1928364563, now seen corresponding path program 3 times [2024-11-28 04:49:40,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:49:40,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067172895] [2024-11-28 04:49:40,880 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:49:40,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:49:40,918 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-28 04:49:40,919 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:49:40,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1967775265] [2024-11-28 04:49:40,920 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:49:40,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:49:40,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:49:40,922 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:49:40,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 04:49:40,990 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 04:49:40,990 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:49:40,997 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-28 04:49:41,000 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:49:41,836 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 43 proven. 18 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2024-11-28 04:49:41,836 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:49:42,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:49:42,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067172895] [2024-11-28 04:49:42,873 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:49:42,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967775265] [2024-11-28 04:49:42,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967775265] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:49:42,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:49:42,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-11-28 04:49:42,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870881070] [2024-11-28 04:49:42,874 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 04:49:42,875 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 04:49:42,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:49:42,875 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 04:49:42,876 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2024-11-28 04:49:42,876 INFO L87 Difference]: Start difference. First operand 107 states and 153 transitions. Second operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2024-11-28 04:49:43,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:49:43,611 INFO L93 Difference]: Finished difference Result 115 states and 160 transitions. [2024-11-28 04:49:43,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 04:49:43,612 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 77 [2024-11-28 04:49:43,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:49:43,614 INFO L225 Difference]: With dead ends: 115 [2024-11-28 04:49:43,615 INFO L226 Difference]: Without dead ends: 113 [2024-11-28 04:49:43,616 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2024-11-28 04:49:43,617 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 25 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:49:43,617 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 165 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 04:49:43,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-28 04:49:43,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2024-11-28 04:49:43,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 57 states have internal predecessors, (68), 45 states have call successors, (45), 10 states have call predecessors, (45), 10 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2024-11-28 04:49:43,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 156 transitions. [2024-11-28 04:49:43,657 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 156 transitions. Word has length 77 [2024-11-28 04:49:43,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:49:43,658 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 156 transitions. [2024-11-28 04:49:43,658 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2024-11-28 04:49:43,658 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 156 transitions. [2024-11-28 04:49:43,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-28 04:49:43,661 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:49:43,661 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 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, 1, 1, 1] [2024-11-28 04:49:43,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-28 04:49:43,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:49:43,866 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:49:43,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:49:43,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1939074476, now seen corresponding path program 1 times [2024-11-28 04:49:43,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:49:43,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69097850] [2024-11-28 04:49:43,867 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:49:43,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:49:43,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:49:43,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1586115456] [2024-11-28 04:49:43,912 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:49:43,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:49:43,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:49:43,916 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:49:43,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 04:49:44,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:49:44,007 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-28 04:49:44,010 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:49:44,669 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2024-11-28 04:49:44,669 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:49:45,181 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-11-28 04:49:45,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:49:45,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69097850] [2024-11-28 04:49:45,181 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:49:45,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586115456] [2024-11-28 04:49:45,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586115456] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:49:45,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:49:45,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-11-28 04:49:45,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538141757] [2024-11-28 04:49:45,182 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:49:45,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 04:49:45,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:49:45,183 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 04:49:45,184 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-11-28 04:49:45,184 INFO L87 Difference]: Start difference. First operand 111 states and 156 transitions. Second operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2024-11-28 04:49:47,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:49:47,446 INFO L93 Difference]: Finished difference Result 195 states and 303 transitions. [2024-11-28 04:49:47,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 04:49:47,446 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 83 [2024-11-28 04:49:47,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:49:47,450 INFO L225 Difference]: With dead ends: 195 [2024-11-28 04:49:47,452 INFO L226 Difference]: Without dead ends: 191 [2024-11-28 04:49:47,454 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2024-11-28 04:49:47,454 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 55 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:49:47,454 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 477 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-28 04:49:47,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2024-11-28 04:49:47,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 188. [2024-11-28 04:49:47,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 81 states have (on average 1.3333333333333333) internal successors, (108), 84 states have internal predecessors, (108), 94 states have call successors, (94), 12 states have call predecessors, (94), 12 states have return successors, (92), 91 states have call predecessors, (92), 92 states have call successors, (92) [2024-11-28 04:49:47,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 294 transitions. [2024-11-28 04:49:47,548 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 294 transitions. Word has length 83 [2024-11-28 04:49:47,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:49:47,548 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 294 transitions. [2024-11-28 04:49:47,548 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2024-11-28 04:49:47,549 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 294 transitions. [2024-11-28 04:49:47,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-28 04:49:47,550 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:49:47,550 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 3, 3, 3, 3, 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] [2024-11-28 04:49:47,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 04:49:47,754 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:49:47,755 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:49:47,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:49:47,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1291235246, now seen corresponding path program 4 times [2024-11-28 04:49:47,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:49:47,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452788044] [2024-11-28 04:49:47,755 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:49:47,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:49:47,775 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:49:47,775 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:49:47,888 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2024-11-28 04:49:47,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:49:47,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452788044] [2024-11-28 04:49:47,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452788044] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:49:47,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:49:47,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:49:47,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507384378] [2024-11-28 04:49:47,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:49:47,890 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:49:47,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:49:47,890 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:49:47,890 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:49:47,891 INFO L87 Difference]: Start difference. First operand 188 states and 294 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-28 04:49:48,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:49:48,029 INFO L93 Difference]: Finished difference Result 233 states and 362 transitions. [2024-11-28 04:49:48,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:49:48,029 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 90 [2024-11-28 04:49:48,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:49:48,031 INFO L225 Difference]: With dead ends: 233 [2024-11-28 04:49:48,031 INFO L226 Difference]: Without dead ends: 171 [2024-11-28 04:49:48,032 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:49:48,033 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 4 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:49:48,033 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 157 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:49:48,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-11-28 04:49:48,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 162. [2024-11-28 04:49:48,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 74 states have internal predecessors, (88), 78 states have call successors, (78), 12 states have call predecessors, (78), 12 states have return successors, (76), 75 states have call predecessors, (76), 76 states have call successors, (76) [2024-11-28 04:49:48,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 242 transitions. [2024-11-28 04:49:48,104 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 242 transitions. Word has length 90 [2024-11-28 04:49:48,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:49:48,107 INFO L471 AbstractCegarLoop]: Abstraction has 162 states and 242 transitions. [2024-11-28 04:49:48,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-28 04:49:48,107 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 242 transitions. [2024-11-28 04:49:48,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-28 04:49:48,109 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:49:48,109 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 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] [2024-11-28 04:49:48,110 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-28 04:49:48,110 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:49:48,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:49:48,110 INFO L85 PathProgramCache]: Analyzing trace with hash -557243959, now seen corresponding path program 1 times [2024-11-28 04:49:48,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:49:48,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398496336] [2024-11-28 04:49:48,111 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:49:48,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:49:48,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:49:48,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [139551985] [2024-11-28 04:49:48,140 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:49:48,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:49:48,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:49:48,142 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:49:48,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 04:49:48,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:49:48,230 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-28 04:49:48,233 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:49:49,279 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 57 proven. 24 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2024-11-28 04:49:49,279 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:49:51,266 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 51 proven. 15 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2024-11-28 04:49:51,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:49:51,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398496336] [2024-11-28 04:49:51,267 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:49:51,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139551985] [2024-11-28 04:49:51,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139551985] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:49:51,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:49:51,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2024-11-28 04:49:51,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11212412] [2024-11-28 04:49:51,268 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:49:51,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 04:49:51,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:49:51,269 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 04:49:51,270 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2024-11-28 04:49:51,270 INFO L87 Difference]: Start difference. First operand 162 states and 242 transitions. Second operand has 24 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2024-11-28 04:50:06,837 WARN L286 SmtUtils]: Spent 13.82s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 04:50:19,186 WARN L286 SmtUtils]: Spent 8.21s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 04:50:20,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 04:50:30,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 04:50:34,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 04:50:38,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 04:50:43,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 04:50:47,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 04:50:49,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:50:49,699 INFO L93 Difference]: Finished difference Result 198 states and 297 transitions. [2024-11-28 04:50:49,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-28 04:50:49,700 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) Word has length 98 [2024-11-28 04:50:49,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:50:49,702 INFO L225 Difference]: With dead ends: 198 [2024-11-28 04:50:49,702 INFO L226 Difference]: Without dead ends: 196 [2024-11-28 04:50:49,703 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 35.0s TimeCoverageRelationStatistics Valid=371, Invalid=1188, Unknown=1, NotChecked=0, Total=1560 [2024-11-28 04:50:49,704 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 52 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 87 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:50:49,704 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 358 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 669 Invalid, 5 Unknown, 0 Unchecked, 24.6s Time] [2024-11-28 04:50:49,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2024-11-28 04:50:49,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 190. [2024-11-28 04:50:49,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 89 states have internal predecessors, (106), 90 states have call successors, (90), 14 states have call predecessors, (90), 14 states have return successors, (88), 86 states have call predecessors, (88), 88 states have call successors, (88) [2024-11-28 04:50:49,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 284 transitions. [2024-11-28 04:50:49,831 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 284 transitions. Word has length 98 [2024-11-28 04:50:49,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:50:49,831 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 284 transitions. [2024-11-28 04:50:49,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2024-11-28 04:50:49,832 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 284 transitions. [2024-11-28 04:50:49,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-11-28 04:50:49,833 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:49,833 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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] [2024-11-28 04:50:49,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-28 04:50:50,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:50,038 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:50:50,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:50,038 INFO L85 PathProgramCache]: Analyzing trace with hash -389224818, now seen corresponding path program 1 times [2024-11-28 04:50:50,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:50:50,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456201614] [2024-11-28 04:50:50,038 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:50,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:50:50,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:50,216 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 38 proven. 7 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-11-28 04:50:50,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:50:50,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456201614] [2024-11-28 04:50:50,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456201614] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:50:50,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274525673] [2024-11-28 04:50:50,216 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:50,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:50,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:50:50,219 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:50:50,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 04:50:50,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:50,298 INFO L256 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 04:50:50,301 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:50:50,336 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 84 proven. 7 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2024-11-28 04:50:50,337 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:50:50,478 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 38 proven. 7 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-11-28 04:50:50,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274525673] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:50:50,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:50:50,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2024-11-28 04:50:50,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226768445] [2024-11-28 04:50:50,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:50:50,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 04:50:50,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:50:50,480 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 04:50:50,480 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:50:50,481 INFO L87 Difference]: Start difference. First operand 190 states and 284 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2024-11-28 04:50:50,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:50:50,822 INFO L93 Difference]: Finished difference Result 223 states and 339 transitions. [2024-11-28 04:50:50,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 04:50:50,823 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 111 [2024-11-28 04:50:50,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:50:50,825 INFO L225 Difference]: With dead ends: 223 [2024-11-28 04:50:50,825 INFO L226 Difference]: Without dead ends: 211 [2024-11-28 04:50:50,826 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 219 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-11-28 04:50:50,827 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 11 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:50:50,827 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 292 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:50:50,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2024-11-28 04:50:50,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 185. [2024-11-28 04:50:50,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 82 states have (on average 1.2195121951219512) internal successors, (100), 85 states have internal predecessors, (100), 89 states have call successors, (89), 13 states have call predecessors, (89), 13 states have return successors, (87), 86 states have call predecessors, (87), 87 states have call successors, (87) [2024-11-28 04:50:50,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 276 transitions. [2024-11-28 04:50:50,955 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 276 transitions. Word has length 111 [2024-11-28 04:50:50,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:50:50,955 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 276 transitions. [2024-11-28 04:50:50,955 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2024-11-28 04:50:50,955 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 276 transitions. [2024-11-28 04:50:50,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-11-28 04:50:50,957 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:50,957 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 4, 4, 4, 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] [2024-11-28 04:50:50,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-28 04:50:51,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-28 04:50:51,158 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:50:51,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:51,158 INFO L85 PathProgramCache]: Analyzing trace with hash 784855492, now seen corresponding path program 2 times [2024-11-28 04:50:51,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:50:51,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884043487] [2024-11-28 04:50:51,158 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:50:51,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:50:51,185 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:50:51,186 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:50:51,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [552584503] [2024-11-28 04:50:51,187 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:50:51,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:51,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:50:51,189 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:50:51,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 04:50:51,282 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:50:51,282 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:50:51,284 INFO L256 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-28 04:50:51,285 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:50:51,875 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 61 proven. 41 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2024-11-28 04:50:51,876 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:50:52,092 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 68 proven. 7 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2024-11-28 04:50:52,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:50:52,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884043487] [2024-11-28 04:50:52,093 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:50:52,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552584503] [2024-11-28 04:50:52,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552584503] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:50:52,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:50:52,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 22 [2024-11-28 04:50:52,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969891908] [2024-11-28 04:50:52,093 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:50:52,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 04:50:52,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:50:52,094 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 04:50:52,094 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2024-11-28 04:50:52,094 INFO L87 Difference]: Start difference. First operand 185 states and 276 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 19 states have internal predecessors, (39), 9 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2024-11-28 04:50:53,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:50:53,545 INFO L93 Difference]: Finished difference Result 215 states and 318 transitions. [2024-11-28 04:50:53,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 04:50:53,546 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 19 states have internal predecessors, (39), 9 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) Word has length 111 [2024-11-28 04:50:53,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:50:53,548 INFO L225 Difference]: With dead ends: 215 [2024-11-28 04:50:53,548 INFO L226 Difference]: Without dead ends: 212 [2024-11-28 04:50:53,551 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 04:50:53,552 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 45 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 04:50:53,552 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 238 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 04:50:53,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2024-11-28 04:50:53,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 191. [2024-11-28 04:50:53,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 88 states have (on average 1.2045454545454546) internal successors, (106), 90 states have internal predecessors, (106), 87 states have call successors, (87), 15 states have call predecessors, (87), 15 states have return successors, (86), 85 states have call predecessors, (86), 86 states have call successors, (86) [2024-11-28 04:50:53,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 279 transitions. [2024-11-28 04:50:53,664 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 279 transitions. Word has length 111 [2024-11-28 04:50:53,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:50:53,665 INFO L471 AbstractCegarLoop]: Abstraction has 191 states and 279 transitions. [2024-11-28 04:50:53,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 19 states have internal predecessors, (39), 9 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2024-11-28 04:50:53,665 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 279 transitions. [2024-11-28 04:50:53,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-11-28 04:50:53,666 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:53,667 INFO L218 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 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] [2024-11-28 04:50:53,675 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 04:50:53,867 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:53,867 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:50:53,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:53,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1677220558, now seen corresponding path program 3 times [2024-11-28 04:50:53,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:50:53,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489425807] [2024-11-28 04:50:53,868 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:50:53,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:50:53,924 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-28 04:50:53,925 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:50:53,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [413245397] [2024-11-28 04:50:53,926 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:50:53,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:53,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:50:53,929 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:50:53,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 04:50:54,015 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 04:50:54,016 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:50:54,018 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-28 04:50:54,021 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:50:54,420 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 86 proven. 32 refuted. 0 times theorem prover too weak. 359 trivial. 0 not checked. [2024-11-28 04:50:54,420 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:50:54,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:50:54,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489425807] [2024-11-28 04:50:54,523 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:50:54,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413245397] [2024-11-28 04:50:54,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413245397] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:50:54,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:50:54,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-11-28 04:50:54,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332335257] [2024-11-28 04:50:54,523 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 04:50:54,524 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 04:50:54,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:50:54,524 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 04:50:54,524 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-11-28 04:50:54,524 INFO L87 Difference]: Start difference. First operand 191 states and 279 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2024-11-28 04:50:54,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:50:54,904 INFO L93 Difference]: Finished difference Result 207 states and 292 transitions. [2024-11-28 04:50:54,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 04:50:54,905 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 114 [2024-11-28 04:50:54,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:50:54,907 INFO L225 Difference]: With dead ends: 207 [2024-11-28 04:50:54,907 INFO L226 Difference]: Without dead ends: 205 [2024-11-28 04:50:54,908 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-28 04:50:54,909 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:50:54,909 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 203 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:50:54,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-11-28 04:50:55,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 203. [2024-11-28 04:50:55,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 97 states have (on average 1.1855670103092784) internal successors, (115), 99 states have internal predecessors, (115), 87 states have call successors, (87), 18 states have call predecessors, (87), 18 states have return successors, (86), 85 states have call predecessors, (86), 86 states have call successors, (86) [2024-11-28 04:50:55,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 288 transitions. [2024-11-28 04:50:55,031 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 288 transitions. Word has length 114 [2024-11-28 04:50:55,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:50:55,032 INFO L471 AbstractCegarLoop]: Abstraction has 203 states and 288 transitions. [2024-11-28 04:50:55,032 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2024-11-28 04:50:55,032 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 288 transitions. [2024-11-28 04:50:55,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2024-11-28 04:50:55,034 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:55,034 INFO L218 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 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] [2024-11-28 04:50:55,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-28 04:50:55,237 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 04:50:55,238 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:50:55,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:55,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1710922149, now seen corresponding path program 4 times [2024-11-28 04:50:55,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:50:55,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467584536] [2024-11-28 04:50:55,239 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:50:55,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:50:55,278 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:50:55,278 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:50:55,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2026846630] [2024-11-28 04:50:55,280 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:50:55,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:55,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:50:55,283 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:50:55,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 04:50:55,398 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:50:55,399 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:50:55,401 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-28 04:50:55,405 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:50:56,562 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 57 proven. 38 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2024-11-28 04:50:56,563 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:50:57,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:50:57,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467584536] [2024-11-28 04:50:57,518 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:50:57,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026846630] [2024-11-28 04:50:57,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026846630] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:50:57,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:50:57,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-11-28 04:50:57,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788114107] [2024-11-28 04:50:57,518 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 04:50:57,518 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 04:50:57,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:50:57,519 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 04:50:57,519 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2024-11-28 04:50:57,520 INFO L87 Difference]: Start difference. First operand 203 states and 288 transitions. Second operand has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2024-11-28 04:50:58,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:50:58,402 INFO L93 Difference]: Finished difference Result 241 states and 336 transitions. [2024-11-28 04:50:58,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 04:50:58,403 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 116 [2024-11-28 04:50:58,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:50:58,405 INFO L225 Difference]: With dead ends: 241 [2024-11-28 04:50:58,405 INFO L226 Difference]: Without dead ends: 239 [2024-11-28 04:50:58,405 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 153 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2024-11-28 04:50:58,406 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 19 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:50:58,406 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 372 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 04:50:58,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2024-11-28 04:50:58,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 236. [2024-11-28 04:50:58,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 116 states have internal predecessors, (134), 99 states have call successors, (99), 22 states have call predecessors, (99), 22 states have return successors, (98), 97 states have call predecessors, (98), 98 states have call successors, (98) [2024-11-28 04:50:58,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 331 transitions. [2024-11-28 04:50:58,574 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 331 transitions. Word has length 116 [2024-11-28 04:50:58,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:50:58,574 INFO L471 AbstractCegarLoop]: Abstraction has 236 states and 331 transitions. [2024-11-28 04:50:58,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2024-11-28 04:50:58,574 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 331 transitions. [2024-11-28 04:50:58,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2024-11-28 04:50:58,576 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:58,576 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:50:58,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-28 04:50:58,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 04:50:58,776 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:50:58,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:58,777 INFO L85 PathProgramCache]: Analyzing trace with hash -853530013, now seen corresponding path program 2 times [2024-11-28 04:50:58,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:50:58,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614983320] [2024-11-28 04:50:58,777 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:50:58,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:50:58,810 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:50:58,811 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:50:58,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1001508979] [2024-11-28 04:50:58,812 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:50:58,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:58,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:50:58,814 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:50:58,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 04:50:58,911 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:50:58,912 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:50:58,914 INFO L256 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-28 04:50:58,922 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:50:59,688 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 73 proven. 38 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-11-28 04:50:59,689 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:51:00,954 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 73 proven. 38 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-11-28 04:51:00,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:51:00,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614983320] [2024-11-28 04:51:00,955 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:51:00,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001508979] [2024-11-28 04:51:00,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001508979] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:51:00,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:51:00,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2024-11-28 04:51:00,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594333466] [2024-11-28 04:51:00,956 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:51:00,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 04:51:00,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:51:00,957 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 04:51:00,957 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2024-11-28 04:51:00,957 INFO L87 Difference]: Start difference. First operand 236 states and 331 transitions. Second operand has 27 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 14 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (40), 12 states have call predecessors, (40), 12 states have call successors, (40) [2024-11-28 04:51:07,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:07,235 INFO L93 Difference]: Finished difference Result 308 states and 448 transitions. [2024-11-28 04:51:07,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-28 04:51:07,236 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 14 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (40), 12 states have call predecessors, (40), 12 states have call successors, (40) Word has length 127 [2024-11-28 04:51:07,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:07,238 INFO L225 Difference]: With dead ends: 308 [2024-11-28 04:51:07,238 INFO L226 Difference]: Without dead ends: 304 [2024-11-28 04:51:07,240 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 225 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=572, Invalid=2290, Unknown=0, NotChecked=0, Total=2862 [2024-11-28 04:51:07,240 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 66 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:07,241 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 592 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-11-28 04:51:07,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2024-11-28 04:51:07,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 263. [2024-11-28 04:51:07,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 123 states have (on average 1.1788617886178863) internal successors, (145), 126 states have internal predecessors, (145), 115 states have call successors, (115), 24 states have call predecessors, (115), 24 states have return successors, (114), 112 states have call predecessors, (114), 114 states have call successors, (114) [2024-11-28 04:51:07,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 374 transitions. [2024-11-28 04:51:07,448 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 374 transitions. Word has length 127 [2024-11-28 04:51:07,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:07,448 INFO L471 AbstractCegarLoop]: Abstraction has 263 states and 374 transitions. [2024-11-28 04:51:07,449 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 14 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (40), 12 states have call predecessors, (40), 12 states have call successors, (40) [2024-11-28 04:51:07,449 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 374 transitions. [2024-11-28 04:51:07,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-11-28 04:51:07,450 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:07,450 INFO L218 NwaCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:51:07,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-28 04:51:07,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 04:51:07,650 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:07,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:07,651 INFO L85 PathProgramCache]: Analyzing trace with hash 675635967, now seen corresponding path program 5 times [2024-11-28 04:51:07,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:51:07,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141138371] [2024-11-28 04:51:07,651 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:51:07,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:51:07,728 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-11-28 04:51:07,729 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:51:07,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [974200127] [2024-11-28 04:51:07,731 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:51:07,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:07,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:07,733 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:07,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 04:51:07,894 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-11-28 04:51:07,894 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:51:07,896 INFO L256 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-28 04:51:07,899 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:08,960 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 74 proven. 74 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2024-11-28 04:51:08,960 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:51:09,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:51:09,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141138371] [2024-11-28 04:51:09,727 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:51:09,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974200127] [2024-11-28 04:51:09,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974200127] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:51:09,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:51:09,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-11-28 04:51:09,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973622781] [2024-11-28 04:51:09,728 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 04:51:09,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 04:51:09,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:51:09,729 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 04:51:09,729 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2024-11-28 04:51:09,729 INFO L87 Difference]: Start difference. First operand 263 states and 374 transitions. Second operand has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 16 states have internal predecessors, (28), 8 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 9 states have call predecessors, (24), 8 states have call successors, (24) [2024-11-28 04:51:10,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:10,868 INFO L93 Difference]: Finished difference Result 310 states and 435 transitions. [2024-11-28 04:51:10,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 04:51:10,869 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 16 states have internal predecessors, (28), 8 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 9 states have call predecessors, (24), 8 states have call successors, (24) Word has length 137 [2024-11-28 04:51:10,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:10,871 INFO L225 Difference]: With dead ends: 310 [2024-11-28 04:51:10,871 INFO L226 Difference]: Without dead ends: 308 [2024-11-28 04:51:10,872 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=202, Invalid=1130, Unknown=0, NotChecked=0, Total=1332 [2024-11-28 04:51:10,873 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 27 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:10,873 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 243 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 04:51:10,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2024-11-28 04:51:11,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 305. [2024-11-28 04:51:11,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 144 states have (on average 1.1736111111111112) internal successors, (169), 147 states have internal predecessors, (169), 131 states have call successors, (131), 29 states have call predecessors, (131), 29 states have return successors, (130), 128 states have call predecessors, (130), 130 states have call successors, (130) [2024-11-28 04:51:11,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 430 transitions. [2024-11-28 04:51:11,106 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 430 transitions. Word has length 137 [2024-11-28 04:51:11,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:11,107 INFO L471 AbstractCegarLoop]: Abstraction has 305 states and 430 transitions. [2024-11-28 04:51:11,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 16 states have internal predecessors, (28), 8 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 9 states have call predecessors, (24), 8 states have call successors, (24) [2024-11-28 04:51:11,107 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 430 transitions. [2024-11-28 04:51:11,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-11-28 04:51:11,108 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:11,108 INFO L218 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:51:11,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-28 04:51:11,309 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:11,309 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:11,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:11,309 INFO L85 PathProgramCache]: Analyzing trace with hash 721616946, now seen corresponding path program 6 times [2024-11-28 04:51:11,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:51:11,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398223685] [2024-11-28 04:51:11,310 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:51:11,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:51:11,359 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-11-28 04:51:11,359 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:51:11,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2028702595] [2024-11-28 04:51:11,361 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:51:11,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:11,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:11,364 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:11,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 04:51:11,565 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 04:51:11,565 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:51:11,567 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-28 04:51:11,571 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:20,912 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 177 proven. 65 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2024-11-28 04:51:20,912 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:51:21,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:51:21,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398223685] [2024-11-28 04:51:21,591 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:51:21,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028702595] [2024-11-28 04:51:21,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028702595] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:51:21,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:51:21,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-11-28 04:51:21,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672034904] [2024-11-28 04:51:21,592 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 04:51:21,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 04:51:21,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:51:21,593 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 04:51:21,593 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=343, Unknown=2, NotChecked=0, Total=420 [2024-11-28 04:51:21,593 INFO L87 Difference]: Start difference. First operand 305 states and 430 transitions. Second operand has 18 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2024-11-28 04:51:26,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:51:30,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:51:35,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:51:43,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:51:47,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:51:52,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:51:56,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:51:58,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.80s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:52:07,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:52:11,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:52:15,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:52:23,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:52:23,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:52:23,946 INFO L93 Difference]: Finished difference Result 323 states and 444 transitions. [2024-11-28 04:52:23,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 04:52:23,946 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) Word has length 142 [2024-11-28 04:52:23,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:52:23,948 INFO L225 Difference]: With dead ends: 323 [2024-11-28 04:52:23,948 INFO L226 Difference]: Without dead ends: 321 [2024-11-28 04:52:23,949 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=155, Invalid=597, Unknown=4, NotChecked=0, Total=756 [2024-11-28 04:52:23,949 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 12 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 18 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:52:23,949 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 278 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 504 Invalid, 13 Unknown, 0 Unchecked, 49.4s Time] [2024-11-28 04:52:23,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2024-11-28 04:52:24,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 321. [2024-11-28 04:52:24,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 156 states have (on average 1.1602564102564104) internal successors, (181), 159 states have internal predecessors, (181), 131 states have call successors, (131), 33 states have call predecessors, (131), 33 states have return successors, (130), 128 states have call predecessors, (130), 130 states have call successors, (130) [2024-11-28 04:52:24,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 442 transitions. [2024-11-28 04:52:24,260 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 442 transitions. Word has length 142 [2024-11-28 04:52:24,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:52:24,261 INFO L471 AbstractCegarLoop]: Abstraction has 321 states and 442 transitions. [2024-11-28 04:52:24,261 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2024-11-28 04:52:24,261 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 442 transitions. [2024-11-28 04:52:24,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2024-11-28 04:52:24,263 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:52:24,264 INFO L218 NwaCegarLoop]: trace histogram [23, 22, 22, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:52:24,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-28 04:52:24,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:24,464 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:52:24,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:24,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1166962277, now seen corresponding path program 7 times [2024-11-28 04:52:24,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:52:24,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215761648] [2024-11-28 04:52:24,465 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:52:24,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:52:24,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:52:24,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1990845613] [2024-11-28 04:52:24,516 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:52:24,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:24,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:24,519 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:24,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 04:52:24,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:52:24,652 INFO L256 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-11-28 04:52:24,657 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:26,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1097 backedges. 103 proven. 88 refuted. 0 times theorem prover too weak. 906 trivial. 0 not checked. [2024-11-28 04:52:26,492 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:52:28,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:52:28,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215761648] [2024-11-28 04:52:28,686 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:52:28,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990845613] [2024-11-28 04:52:28,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990845613] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:52:28,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:52:28,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-11-28 04:52:28,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579012114] [2024-11-28 04:52:28,687 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 04:52:28,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 04:52:28,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:52:28,688 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 04:52:28,688 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2024-11-28 04:52:28,689 INFO L87 Difference]: Start difference. First operand 321 states and 442 transitions. Second operand has 20 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2024-11-28 04:52:30,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:52:30,275 INFO L93 Difference]: Finished difference Result 365 states and 507 transitions. [2024-11-28 04:52:30,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 04:52:30,276 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) Word has length 158 [2024-11-28 04:52:30,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:52:30,279 INFO L225 Difference]: With dead ends: 365 [2024-11-28 04:52:30,279 INFO L226 Difference]: Without dead ends: 363 [2024-11-28 04:52:30,280 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=228, Invalid=1332, Unknown=0, NotChecked=0, Total=1560 [2024-11-28 04:52:30,281 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 34 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 04:52:30,281 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 400 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 04:52:30,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2024-11-28 04:52:30,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 330. [2024-11-28 04:52:30,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 160 states have (on average 1.1625) internal successors, (186), 163 states have internal predecessors, (186), 135 states have call successors, (135), 34 states have call predecessors, (135), 34 states have return successors, (134), 132 states have call predecessors, (134), 134 states have call successors, (134) [2024-11-28 04:52:30,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 455 transitions. [2024-11-28 04:52:30,579 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 455 transitions. Word has length 158 [2024-11-28 04:52:30,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:52:30,580 INFO L471 AbstractCegarLoop]: Abstraction has 330 states and 455 transitions. [2024-11-28 04:52:30,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2024-11-28 04:52:30,580 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 455 transitions. [2024-11-28 04:52:30,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2024-11-28 04:52:30,582 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:52:30,582 INFO L218 NwaCegarLoop]: trace histogram [23, 22, 22, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:52:30,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-28 04:52:30,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-28 04:52:30,787 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:52:30,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:30,787 INFO L85 PathProgramCache]: Analyzing trace with hash 912740137, now seen corresponding path program 8 times [2024-11-28 04:52:30,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:52:30,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896407587] [2024-11-28 04:52:30,787 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:52:30,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:52:30,852 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:52:30,852 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:52:30,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [312065099] [2024-11-28 04:52:30,857 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:52:30,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:30,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:30,862 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:30,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-28 04:52:31,042 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:52:31,042 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:52:31,049 INFO L256 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-11-28 04:52:31,054 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:34,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1097 backedges. 103 proven. 88 refuted. 0 times theorem prover too weak. 906 trivial. 0 not checked. [2024-11-28 04:52:34,028 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:52:36,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:52:36,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896407587] [2024-11-28 04:52:36,979 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:52:36,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312065099] [2024-11-28 04:52:36,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312065099] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:52:36,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:52:36,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-11-28 04:52:36,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460533398] [2024-11-28 04:52:36,980 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 04:52:36,981 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 04:52:36,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:52:36,982 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 04:52:36,982 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=908, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 04:52:36,982 INFO L87 Difference]: Start difference. First operand 330 states and 455 transitions. Second operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2024-11-28 04:52:40,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:52:40,063 INFO L93 Difference]: Finished difference Result 367 states and 508 transitions. [2024-11-28 04:52:40,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 04:52:40,064 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) Word has length 158 [2024-11-28 04:52:40,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:52:40,068 INFO L225 Difference]: With dead ends: 367 [2024-11-28 04:52:40,068 INFO L226 Difference]: Without dead ends: 365 [2024-11-28 04:52:40,069 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=254, Invalid=1468, Unknown=0, NotChecked=0, Total=1722 [2024-11-28 04:52:40,070 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 32 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-28 04:52:40,071 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 230 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 936 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-28 04:52:40,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2024-11-28 04:52:40,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 332. [2024-11-28 04:52:40,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 161 states have (on average 1.1614906832298137) internal successors, (187), 164 states have internal predecessors, (187), 135 states have call successors, (135), 35 states have call predecessors, (135), 35 states have return successors, (134), 132 states have call predecessors, (134), 134 states have call successors, (134) [2024-11-28 04:52:40,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 456 transitions. [2024-11-28 04:52:40,525 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 456 transitions. Word has length 158 [2024-11-28 04:52:40,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:52:40,526 INFO L471 AbstractCegarLoop]: Abstraction has 332 states and 456 transitions. [2024-11-28 04:52:40,526 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2024-11-28 04:52:40,526 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 456 transitions. [2024-11-28 04:52:40,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2024-11-28 04:52:40,528 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:52:40,528 INFO L218 NwaCegarLoop]: trace histogram [23, 22, 22, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:52:40,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-28 04:52:40,732 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-28 04:52:40,733 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:52:40,733 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:40,733 INFO L85 PathProgramCache]: Analyzing trace with hash 415659227, now seen corresponding path program 9 times [2024-11-28 04:52:40,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:52:40,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158035583] [2024-11-28 04:52:40,734 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:52:40,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:52:40,797 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-11-28 04:52:40,797 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:52:40,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [401667433] [2024-11-28 04:52:40,799 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:52:40,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:40,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:40,802 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:40,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 04:52:40,937 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-28 04:52:40,937 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:52:40,939 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-28 04:52:40,945 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:41,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1097 backedges. 226 proven. 38 refuted. 0 times theorem prover too weak. 833 trivial. 0 not checked. [2024-11-28 04:52:41,233 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:52:41,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:52:41,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158035583] [2024-11-28 04:52:41,468 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:52:41,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401667433] [2024-11-28 04:52:41,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401667433] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:52:41,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:52:41,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2024-11-28 04:52:41,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758200245] [2024-11-28 04:52:41,468 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 04:52:41,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 04:52:41,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:52:41,469 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 04:52:41,470 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2024-11-28 04:52:41,470 INFO L87 Difference]: Start difference. First operand 332 states and 456 transitions. Second operand has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2024-11-28 04:52:42,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:52:42,326 INFO L93 Difference]: Finished difference Result 358 states and 476 transitions. [2024-11-28 04:52:42,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 04:52:42,326 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 158 [2024-11-28 04:52:42,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:52:42,330 INFO L225 Difference]: With dead ends: 358 [2024-11-28 04:52:42,330 INFO L226 Difference]: Without dead ends: 354 [2024-11-28 04:52:42,330 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2024-11-28 04:52:42,331 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 8 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:52:42,331 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 121 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:52:42,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2024-11-28 04:52:42,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 354. [2024-11-28 04:52:42,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 178 states have (on average 1.1404494382022472) internal successors, (203), 180 states have internal predecessors, (203), 135 states have call successors, (135), 41 states have call predecessors, (135), 40 states have return successors, (134), 132 states have call predecessors, (134), 134 states have call successors, (134) [2024-11-28 04:52:42,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 472 transitions. [2024-11-28 04:52:42,840 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 472 transitions. Word has length 158 [2024-11-28 04:52:42,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:52:42,840 INFO L471 AbstractCegarLoop]: Abstraction has 354 states and 472 transitions. [2024-11-28 04:52:42,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2024-11-28 04:52:42,841 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 472 transitions. [2024-11-28 04:52:42,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2024-11-28 04:52:42,843 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:52:42,843 INFO L218 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:52:42,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-28 04:52:43,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-28 04:52:43,048 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:52:43,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:43,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1997515563, now seen corresponding path program 3 times [2024-11-28 04:52:43,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:52:43,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466597401] [2024-11-28 04:52:43,049 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:52:43,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:52:43,114 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-11-28 04:52:43,114 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:52:43,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1305574659] [2024-11-28 04:52:43,119 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:52:43,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:43,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:43,122 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:43,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-28 04:52:43,371 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-28 04:52:43,371 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:52:43,373 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-28 04:52:43,377 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:44,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 259 proven. 30 refuted. 0 times theorem prover too weak. 1002 trivial. 0 not checked. [2024-11-28 04:52:44,296 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:52:44,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:52:44,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466597401] [2024-11-28 04:52:44,936 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:52:44,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305574659] [2024-11-28 04:52:44,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305574659] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:52:44,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:52:44,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-11-28 04:52:44,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765293696] [2024-11-28 04:52:44,937 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 04:52:44,937 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 04:52:44,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:52:44,938 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 04:52:44,938 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2024-11-28 04:52:44,938 INFO L87 Difference]: Start difference. First operand 354 states and 472 transitions. Second operand has 17 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 8 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) [2024-11-28 04:52:50,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 04:53:01,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:53:01,702 INFO L93 Difference]: Finished difference Result 383 states and 494 transitions. [2024-11-28 04:53:01,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 04:53:01,703 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 8 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) Word has length 169 [2024-11-28 04:53:01,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:53:01,704 INFO L225 Difference]: With dead ends: 383 [2024-11-28 04:53:01,704 INFO L226 Difference]: Without dead ends: 0 [2024-11-28 04:53:01,705 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 159 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2024-11-28 04:53:01,706 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 13 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 30 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:53:01,706 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 155 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 297 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2024-11-28 04:53:01,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-28 04:53:01,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-28 04:53:01,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:53:01,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-28 04:53:01,707 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 169 [2024-11-28 04:53:01,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:53:01,707 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-28 04:53:01,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 8 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) [2024-11-28 04:53:01,707 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-28 04:53:01,708 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-28 04:53:01,710 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-28 04:53:01,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-28 04:53:01,911 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-28 04:53:01,915 INFO L422 BasicCegarLoop]: Path program histogram: [9, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:53:01,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-11-28 04:53:08,097 WARN L286 SmtUtils]: Spent 6.18s on a formula simplification. DAG size of input: 452 DAG size of output: 778 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-11-28 04:53:13,350 WARN L286 SmtUtils]: Spent 5.24s on a formula simplification. DAG size of input: 456 DAG size of output: 750 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-11-28 04:53:18,688 WARN L286 SmtUtils]: Spent 5.08s on a formula simplification. DAG size of input: 456 DAG size of output: 750 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-11-28 04:55:11,092 WARN L286 SmtUtils]: Spent 1.81m on a formula simplification. DAG size of input: 778 DAG size of output: 53 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-11-28 04:57:27,004 WARN L286 SmtUtils]: Spent 2.26m on a formula simplification. DAG size of input: 750 DAG size of output: 53 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-11-28 04:57:46,679 WARN L286 SmtUtils]: Spent 19.40s on a formula simplification. DAG size of input: 373 DAG size of output: 41 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-11-28 04:59:17,978 WARN L286 SmtUtils]: Spent 1.52m on a formula simplification. DAG size of input: 750 DAG size of output: 53 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-11-28 05:00:58,927 WARN L286 SmtUtils]: Spent 1.68m on a formula simplification. DAG size of input: 755 DAG size of output: 50 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-11-28 05:00:58,934 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-28 05:00:58,964 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 05:00:58 BoogieIcfgContainer [2024-11-28 05:00:58,965 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-28 05:00:58,965 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-28 05:00:58,965 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-28 05:00:58,966 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-28 05:00:58,967 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:49:33" (3/4) ... [2024-11-28 05:00:58,971 INFO L146 WitnessPrinter]: Generating witness for correct program [2024-11-28 05:00:58,978 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2024-11-28 05:00:58,978 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-11-28 05:00:58,985 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2024-11-28 05:00:58,985 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2024-11-28 05:00:58,985 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-11-28 05:00:58,986 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-28 05:00:59,090 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/witness.graphml [2024-11-28 05:00:59,090 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/witness.yml [2024-11-28 05:00:59,090 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-28 05:00:59,091 INFO L158 Benchmark]: Toolchain (without parser) took 686606.78ms. Allocated memory was 117.4MB in the beginning and 478.2MB in the end (delta: 360.7MB). Free memory was 93.9MB in the beginning and 247.7MB in the end (delta: -153.8MB). Peak memory consumption was 200.4MB. Max. memory is 16.1GB. [2024-11-28 05:00:59,092 INFO L158 Benchmark]: CDTParser took 0.46ms. Allocated memory is still 167.8MB. Free memory is still 104.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 05:00:59,092 INFO L158 Benchmark]: CACSL2BoogieTranslator took 314.19ms. Allocated memory is still 117.4MB. Free memory was 93.5MB in the beginning and 82.1MB in the end (delta: 11.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 05:00:59,092 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.78ms. Allocated memory is still 117.4MB. Free memory was 82.1MB in the beginning and 80.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 05:00:59,093 INFO L158 Benchmark]: Boogie Preprocessor took 58.88ms. Allocated memory is still 117.4MB. Free memory was 80.8MB in the beginning and 79.5MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 05:00:59,093 INFO L158 Benchmark]: RCFGBuilder took 379.79ms. Allocated memory is still 117.4MB. Free memory was 79.5MB in the beginning and 67.1MB in the end (delta: 12.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-28 05:00:59,093 INFO L158 Benchmark]: TraceAbstraction took 685681.18ms. Allocated memory was 117.4MB in the beginning and 478.2MB in the end (delta: 360.7MB). Free memory was 66.4MB in the beginning and 256.1MB in the end (delta: -189.6MB). Peak memory consumption was 262.2MB. Max. memory is 16.1GB. [2024-11-28 05:00:59,093 INFO L158 Benchmark]: Witness Printer took 125.08ms. Allocated memory is still 478.2MB. Free memory was 256.1MB in the beginning and 247.7MB in the end (delta: 8.4MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 05:00:59,095 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46ms. Allocated memory is still 167.8MB. Free memory is still 104.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 314.19ms. Allocated memory is still 117.4MB. Free memory was 93.5MB in the beginning and 82.1MB in the end (delta: 11.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.78ms. Allocated memory is still 117.4MB. Free memory was 82.1MB in the beginning and 80.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 58.88ms. Allocated memory is still 117.4MB. Free memory was 80.8MB in the beginning and 79.5MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 379.79ms. Allocated memory is still 117.4MB. Free memory was 79.5MB in the beginning and 67.1MB in the end (delta: 12.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 685681.18ms. Allocated memory was 117.4MB in the beginning and 478.2MB in the end (delta: 360.7MB). Free memory was 66.4MB in the beginning and 256.1MB in the end (delta: -189.6MB). Peak memory consumption was 262.2MB. Max. memory is 16.1GB. * Witness Printer took 125.08ms. Allocated memory is still 478.2MB. Free memory was 256.1MB in the beginning and 247.7MB in the end (delta: 8.4MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 208.6s, OverallIterations: 24, TraceHistogramMax: 25, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 158.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 19 mSolverCounterUnknown, 628 SdHoareTripleChecker+Valid, 89.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 492 mSDsluCounter, 5714 SdHoareTripleChecker+Invalid, 88.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4818 mSDsCounter, 766 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7766 IncrementalHoareTripleChecker+Invalid, 8551 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 766 mSolverCounterUnsat, 896 mSDtfsCounter, 7766 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3435 GetRequests, 2926 SyntacticMatches, 24 SemanticMatches, 485 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2642 ImplicationChecksByTransitivity, 86.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=354occurred in iteration=23, InterpolantAutomatonStates: 335, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.1s AutomataMinimizationTime, 24 MinimizatonAttempts, 233 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 38.6s InterpolantComputationTime, 4560 NumberOfCodeBlocks, 4226 NumberOfCodeBlocksAsserted, 146 NumberOfCheckSat, 3193 ConstructedInterpolants, 9 QuantifiedInterpolants, 16355 SizeOfPredicates, 76 NumberOfNonLiveVariables, 4737 ConjunctsInSsa, 748 ConjunctsInUnsatCore, 35 InterpolantComputations, 5 PerfectInterpolantSequences, 12263/13006 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: (((((((((((((((yy == ((long long) y * y)) && (p == 1)) && (1 <= y)) && (y <= 10)) && (b == y)) && (0 <= c)) && (x <= 10)) && (r == 0)) && (q == 0)) && (1 <= x)) && (xy == ((long long) x * y))) && (a == x)) && (x == (c + ((__int128) b * k)))) && (s == 1)) || (((((((((((((b != 0) && (yy == ((long long) y * y))) && ((((__int128) r * y) + ((__int128) p * x)) == (c + ((__int128) b * k)))) && (1 <= y)) && (y <= 10)) && (((__int128) b + 1) <= a)) && ((((__int128) s * y) + ((__int128) q * x)) == b)) && (0 <= (((__int128) s * y) + ((__int128) q * x)))) && (0 <= c)) && (x <= 10)) && (1 <= x)) && (xy == ((long long) x * y))) && ((((__int128) r * y) + ((__int128) p * x)) == a))) - InvariantResult [Line: 41]: Loop Invariant Derived loop invariant: (((((((((((((yy == ((long long) y * y)) && (p == 1)) && (1 <= y)) && (y <= 10)) && (b == y)) && (x <= 10)) && (r == 0)) && (q == 0)) && (1 <= x)) && (xy == ((long long) x * y))) && (a == x)) && (s == 1)) || ((((((((((yy == ((long long) y * y)) && (1 <= y)) && (y <= 10)) && (((__int128) b + 1) <= a)) && ((((__int128) s * y) + ((__int128) q * x)) == b)) && (0 <= (((__int128) s * y) + ((__int128) q * x)))) && (x <= 10)) && (1 <= x)) && (xy == ((long long) x * y))) && ((((__int128) r * y) + ((__int128) p * x)) == a))) RESULT: Ultimate proved your program to be correct! [2024-11-28 05:00:59,306 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forcibly destroying the process [2024-11-28 05:00:59,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f7d84f-2489-4c5a-87cf-e64420f908b9/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 137 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE