./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.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_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/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_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/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_767a6a96-c981-4c95-9405-09a3788ce71d/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 1aca3c96522e618238f11f200c96e0ec490e756d4e04895bd2a51f9a4ff85af1 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 03:34:34,710 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 03:34:34,790 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 03:34:34,797 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 03:34:34,797 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 03:34:34,828 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 03:34:34,829 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 03:34:34,829 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 03:34:34,830 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 03:34:34,830 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 03:34:34,830 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 03:34:34,830 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 03:34:34,831 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 03:34:34,831 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 03:34:34,831 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 03:34:34,831 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 03:34:34,832 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 03:34:34,832 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 03:34:34,832 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 03:34:34,832 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 03:34:34,832 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 03:34:34,833 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 03:34:34,833 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 03:34:34,833 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 03:34:34,833 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 03:34:34,833 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 03:34:34,833 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 03:34:34,834 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 03:34:34,834 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 03:34:34,834 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:34:34,834 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:34:34,834 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:34:34,834 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:34:34,834 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 03:34:34,834 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:34:34,835 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:34:34,835 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:34:34,835 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:34:34,835 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 03:34:34,835 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 03:34:34,835 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 03:34:34,835 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 03:34:34,835 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 03:34:34,836 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 03:34:34,836 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 03:34:34,836 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 03:34:34,836 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 03:34:34,836 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 03:34:34,836 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_767a6a96-c981-4c95-9405-09a3788ce71d/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 -> 1aca3c96522e618238f11f200c96e0ec490e756d4e04895bd2a51f9a4ff85af1 [2024-11-28 03:34:35,194 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 03:34:35,209 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 03:34:35,213 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 03:34:35,216 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 03:34:35,216 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 03:34:35,220 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.c [2024-11-28 03:34:39,001 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/data/49bebbb58/f16cf7c4ef0f43419aaeb337a02b1532/FLAG31ea705b0 [2024-11-28 03:34:39,333 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 03:34:39,334 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.c [2024-11-28 03:34:39,345 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/data/49bebbb58/f16cf7c4ef0f43419aaeb337a02b1532/FLAG31ea705b0 [2024-11-28 03:34:39,379 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/data/49bebbb58/f16cf7c4ef0f43419aaeb337a02b1532 [2024-11-28 03:34:39,382 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 03:34:39,386 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 03:34:39,389 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 03:34:39,389 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 03:34:39,397 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 03:34:39,398 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:34:39" (1/1) ... [2024-11-28 03:34:39,399 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@573ab5e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:34:39, skipping insertion in model container [2024-11-28 03:34:39,399 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:34:39" (1/1) ... [2024-11-28 03:34:39,425 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 03:34:39,640 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_767a6a96-c981-4c95-9405-09a3788ce71d/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.c[490,503] [2024-11-28 03:34:39,686 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:34:39,706 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 03:34:39,721 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_767a6a96-c981-4c95-9405-09a3788ce71d/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.c[490,503] [2024-11-28 03:34:39,748 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:34:39,769 INFO L204 MainTranslator]: Completed translation [2024-11-28 03:34:39,770 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:34:39 WrapperNode [2024-11-28 03:34:39,771 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 03:34:39,773 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 03:34:39,774 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 03:34:39,774 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 03:34:39,784 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:34:39" (1/1) ... [2024-11-28 03:34:39,793 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:34:39" (1/1) ... [2024-11-28 03:34:39,817 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2024-11-28 03:34:39,818 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 03:34:39,819 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 03:34:39,820 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 03:34:39,820 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 03:34:39,832 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:34:39" (1/1) ... [2024-11-28 03:34:39,833 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:34:39" (1/1) ... [2024-11-28 03:34:39,834 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:34:39" (1/1) ... [2024-11-28 03:34:39,862 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 03:34:39,867 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:34:39" (1/1) ... [2024-11-28 03:34:39,868 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:34:39" (1/1) ... [2024-11-28 03:34:39,871 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:34:39" (1/1) ... [2024-11-28 03:34:39,872 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:34:39" (1/1) ... [2024-11-28 03:34:39,879 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:34:39" (1/1) ... [2024-11-28 03:34:39,883 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:34:39" (1/1) ... [2024-11-28 03:34:39,884 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:34:39" (1/1) ... [2024-11-28 03:34:39,890 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 03:34:39,891 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 03:34:39,892 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 03:34:39,892 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 03:34:39,897 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:34:39" (1/1) ... [2024-11-28 03:34:39,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:34:39,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:34:39,953 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 03:34:39,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 03:34:39,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 03:34:39,993 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-28 03:34:39,993 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-28 03:34:39,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 03:34:39,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 03:34:39,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 03:34:39,994 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-28 03:34:39,994 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-28 03:34:40,082 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 03:34:40,085 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 03:34:40,338 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-28 03:34:40,338 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 03:34:40,363 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 03:34:40,363 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-28 03:34:40,364 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:34:40 BoogieIcfgContainer [2024-11-28 03:34:40,364 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 03:34:40,369 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 03:34:40,369 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 03:34:40,377 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 03:34:40,377 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:34:39" (1/3) ... [2024-11-28 03:34:40,378 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42fbd199 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:34:40, skipping insertion in model container [2024-11-28 03:34:40,378 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:34:39" (2/3) ... [2024-11-28 03:34:40,378 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42fbd199 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:34:40, skipping insertion in model container [2024-11-28 03:34:40,378 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:34:40" (3/3) ... [2024-11-28 03:34:40,380 INFO L128 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound5.c [2024-11-28 03:34:40,402 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 03:34:40,405 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG egcd3-ll_valuebound5.c that has 3 procedures, 32 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-28 03:34:40,492 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 03:34:40,513 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;@50fff9e0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 03:34:40,514 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-28 03:34:40,521 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-28 03:34:40,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-28 03:34:40,530 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:34:40,531 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:34:40,532 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:34:40,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:34:40,542 INFO L85 PathProgramCache]: Analyzing trace with hash 843678977, now seen corresponding path program 1 times [2024-11-28 03:34:40,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:34:40,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066066698] [2024-11-28 03:34:40,553 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:34:40,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:34:40,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:34:40,805 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 03:34:40,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:34:40,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066066698] [2024-11-28 03:34:40,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066066698] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:34:40,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368031277] [2024-11-28 03:34:40,813 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:34:40,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:34:40,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:34:40,816 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:34:40,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 03:34:40,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:34:40,970 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-28 03:34:40,976 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:34:40,992 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 03:34:40,993 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:34:40,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368031277] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:34:40,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:34:40,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-11-28 03:34:40,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593726810] [2024-11-28 03:34:40,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:34:41,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-28 03:34:41,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:34:41,031 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-28 03:34:41,031 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 03:34:41,034 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 03:34:41,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:34:41,071 INFO L93 Difference]: Finished difference Result 61 states and 103 transitions. [2024-11-28 03:34:41,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-28 03:34:41,074 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2024-11-28 03:34:41,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:34:41,086 INFO L225 Difference]: With dead ends: 61 [2024-11-28 03:34:41,087 INFO L226 Difference]: Without dead ends: 28 [2024-11-28 03:34:41,093 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 30 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 03:34:41,098 INFO L435 NwaCegarLoop]: 41 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, 41 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 03:34:41,099 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 03:34:41,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-28 03:34:41,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-28 03:34:41,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-28 03:34:41,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2024-11-28 03:34:41,159 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 29 [2024-11-28 03:34:41,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:34:41,160 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2024-11-28 03:34:41,160 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 03:34:41,161 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2024-11-28 03:34:41,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-28 03:34:41,163 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:34:41,164 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:34:41,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 03:34:41,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-28 03:34:41,370 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:34:41,372 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:34:41,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1035775035, now seen corresponding path program 1 times [2024-11-28 03:34:41,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:34:41,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630648573] [2024-11-28 03:34:41,373 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:34:41,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:34:41,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:34:41,914 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 03:34:41,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:34:41,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630648573] [2024-11-28 03:34:41,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630648573] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:34:41,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:34:41,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 03:34:41,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403178488] [2024-11-28 03:34:41,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:34:41,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:34:41,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:34:41,921 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:34:41,921 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:34:41,922 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 03:34:42,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:34:42,110 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2024-11-28 03:34:42,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:34:42,111 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2024-11-28 03:34:42,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:34:42,113 INFO L225 Difference]: With dead ends: 44 [2024-11-28 03:34:42,113 INFO L226 Difference]: Without dead ends: 37 [2024-11-28 03:34:42,113 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:34:42,115 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 21 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:34:42,115 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 90 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 03:34:42,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-28 03:34:42,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2024-11-28 03:34:42,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-28 03:34:42,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2024-11-28 03:34:42,129 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 29 [2024-11-28 03:34:42,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:34:42,130 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2024-11-28 03:34:42,130 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 03:34:42,130 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2024-11-28 03:34:42,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-28 03:34:42,131 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:34:42,131 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:34:42,132 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 03:34:42,132 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:34:42,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:34:42,133 INFO L85 PathProgramCache]: Analyzing trace with hash -2050156495, now seen corresponding path program 1 times [2024-11-28 03:34:42,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:34:42,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708770799] [2024-11-28 03:34:42,134 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:34:42,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:34:42,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 03:34:42,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1328973157] [2024-11-28 03:34:42,170 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:34:42,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:34:42,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:34:42,173 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:34:42,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 03:34:42,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:34:42,279 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 03:34:42,282 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:34:42,465 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 03:34:42,465 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:34:42,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:34:42,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708770799] [2024-11-28 03:34:42,466 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 03:34:42,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328973157] [2024-11-28 03:34:42,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328973157] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:34:42,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:34:42,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:34:42,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726957091] [2024-11-28 03:34:42,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:34:42,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:34:42,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:34:42,468 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:34:42,468 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:34:42,468 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 03:34:42,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:34:42,579 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2024-11-28 03:34:42,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:34:42,581 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2024-11-28 03:34:42,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:34:42,583 INFO L225 Difference]: With dead ends: 43 [2024-11-28 03:34:42,583 INFO L226 Difference]: Without dead ends: 41 [2024-11-28 03:34:42,584 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:34:42,584 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:34:42,585 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 122 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:34:42,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-28 03:34:42,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2024-11-28 03:34:42,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-28 03:34:42,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2024-11-28 03:34:42,606 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 30 [2024-11-28 03:34:42,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:34:42,607 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2024-11-28 03:34:42,607 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 03:34:42,608 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2024-11-28 03:34:42,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-28 03:34:42,609 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:34:42,609 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:34:42,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 03:34:42,811 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:34:42,811 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:34:42,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:34:42,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1667987617, now seen corresponding path program 1 times [2024-11-28 03:34:42,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:34:42,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790779058] [2024-11-28 03:34:42,812 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:34:42,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:34:42,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:34:43,165 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 03:34:43,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:34:43,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790779058] [2024-11-28 03:34:43,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790779058] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:34:43,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923061045] [2024-11-28 03:34:43,165 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:34:43,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:34:43,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:34:43,171 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:34:43,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 03:34:43,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:34:43,266 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 03:34:43,269 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:34:43,388 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 03:34:43,388 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:34:43,610 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 03:34:43,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923061045] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:34:43,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:34:43,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2024-11-28 03:34:43,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476706916] [2024-11-28 03:34:43,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:34:43,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 03:34:43,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:34:43,613 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 03:34:43,613 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-28 03:34:43,613 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 03:34:43,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:34:43,892 INFO L93 Difference]: Finished difference Result 82 states and 122 transitions. [2024-11-28 03:34:43,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:34:43,893 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2024-11-28 03:34:43,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:34:43,894 INFO L225 Difference]: With dead ends: 82 [2024-11-28 03:34:43,894 INFO L226 Difference]: Without dead ends: 75 [2024-11-28 03:34:43,895 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-11-28 03:34:43,896 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 67 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:34:43,896 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 166 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 03:34:43,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-28 03:34:43,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2024-11-28 03:34:43,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 34 states have internal predecessors, (45), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-28 03:34:43,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 78 transitions. [2024-11-28 03:34:43,917 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 78 transitions. Word has length 32 [2024-11-28 03:34:43,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:34:43,918 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 78 transitions. [2024-11-28 03:34:43,918 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 03:34:43,918 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 78 transitions. [2024-11-28 03:34:43,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-28 03:34:43,919 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:34:43,920 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:34:43,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 03:34:44,123 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:34:44,124 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:34:44,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:34:44,125 INFO L85 PathProgramCache]: Analyzing trace with hash -173910057, now seen corresponding path program 1 times [2024-11-28 03:34:44,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:34:44,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118258617] [2024-11-28 03:34:44,125 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:34:44,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:34:44,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 03:34:44,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1292345462] [2024-11-28 03:34:44,166 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:34:44,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:34:44,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:34:44,172 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:34:44,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 03:34:44,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:34:44,259 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 03:34:44,262 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:34:44,458 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 03:34:44,459 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:34:44,603 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 03:34:44,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:34:44,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118258617] [2024-11-28 03:34:44,604 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 03:34:44,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292345462] [2024-11-28 03:34:44,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292345462] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:34:44,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:34:44,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2024-11-28 03:34:44,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774563514] [2024-11-28 03:34:44,605 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:34:44,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 03:34:44,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:34:44,606 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 03:34:44,607 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-28 03:34:44,607 INFO L87 Difference]: Start difference. First operand 54 states and 78 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 03:34:44,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:34:44,839 INFO L93 Difference]: Finished difference Result 83 states and 120 transitions. [2024-11-28 03:34:44,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:34:44,840 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), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2024-11-28 03:34:44,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:34:44,842 INFO L225 Difference]: With dead ends: 83 [2024-11-28 03:34:44,842 INFO L226 Difference]: Without dead ends: 81 [2024-11-28 03:34:44,843 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-11-28 03:34:44,844 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 26 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:34:44,844 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 216 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:34:44,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-28 03:34:44,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2024-11-28 03:34:44,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 48 states have internal predecessors, (65), 25 states have call successors, (25), 4 states have call predecessors, (25), 4 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-11-28 03:34:44,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 114 transitions. [2024-11-28 03:34:44,886 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 114 transitions. Word has length 33 [2024-11-28 03:34:44,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:34:44,886 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 114 transitions. [2024-11-28 03:34:44,887 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), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 03:34:44,887 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 114 transitions. [2024-11-28 03:34:44,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-28 03:34:44,888 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:34:44,888 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:34:44,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 03:34:45,096 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:34:45,096 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:34:45,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:34:45,097 INFO L85 PathProgramCache]: Analyzing trace with hash 379334257, now seen corresponding path program 2 times [2024-11-28 03:34:45,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:34:45,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293686439] [2024-11-28 03:34:45,098 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:34:45,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:34:45,142 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:34:45,142 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:34:45,342 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 03:34:45,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:34:45,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293686439] [2024-11-28 03:34:45,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293686439] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:34:45,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49869447] [2024-11-28 03:34:45,342 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:34:45,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:34:45,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:34:45,348 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:34:45,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 03:34:45,427 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:34:45,427 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:34:45,429 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 03:34:45,431 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:34:45,486 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 03:34:45,487 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:34:45,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49869447] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:34:45,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:34:45,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-28 03:34:45,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188617827] [2024-11-28 03:34:45,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:34:45,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:34:45,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:34:45,491 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:34:45,491 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-28 03:34:45,491 INFO L87 Difference]: Start difference. First operand 77 states and 114 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 03:34:45,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:34:45,693 INFO L93 Difference]: Finished difference Result 116 states and 178 transitions. [2024-11-28 03:34:45,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:34:45,694 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 36 [2024-11-28 03:34:45,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:34:45,696 INFO L225 Difference]: With dead ends: 116 [2024-11-28 03:34:45,696 INFO L226 Difference]: Without dead ends: 87 [2024-11-28 03:34:45,697 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-28 03:34:45,698 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 13 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:34:45,698 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 122 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:34:45,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-28 03:34:45,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 58. [2024-11-28 03:34:45,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 37 states have internal predecessors, (46), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-28 03:34:45,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 79 transitions. [2024-11-28 03:34:45,725 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 79 transitions. Word has length 36 [2024-11-28 03:34:45,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:34:45,726 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 79 transitions. [2024-11-28 03:34:45,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 03:34:45,726 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 79 transitions. [2024-11-28 03:34:45,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-28 03:34:45,727 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:34:45,727 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:34:45,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 03:34:45,932 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-28 03:34:45,932 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:34:45,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:34:45,932 INFO L85 PathProgramCache]: Analyzing trace with hash 983263606, now seen corresponding path program 1 times [2024-11-28 03:34:45,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:34:45,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773577928] [2024-11-28 03:34:45,933 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:34:45,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:34:45,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 03:34:45,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1960850362] [2024-11-28 03:34:45,956 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:34:45,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:34:45,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:34:45,959 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:34:45,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 03:34:46,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:34:46,047 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 03:34:46,056 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:34:46,276 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 03:34:46,276 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:34:46,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:34:46,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773577928] [2024-11-28 03:34:46,390 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 03:34:46,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960850362] [2024-11-28 03:34:46,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960850362] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:34:46,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:34:46,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2024-11-28 03:34:46,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741870347] [2024-11-28 03:34:46,391 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 03:34:46,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:34:46,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:34:46,393 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:34:46,397 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-28 03:34:46,398 INFO L87 Difference]: Start difference. First operand 58 states and 79 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 03:34:46,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:34:46,697 INFO L93 Difference]: Finished difference Result 79 states and 110 transitions. [2024-11-28 03:34:46,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:34:46,699 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2024-11-28 03:34:46,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:34:46,703 INFO L225 Difference]: With dead ends: 79 [2024-11-28 03:34:46,703 INFO L226 Difference]: Without dead ends: 77 [2024-11-28 03:34:46,704 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:34:46,705 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 21 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:34:46,705 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 179 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 03:34:46,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-28 03:34:46,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2024-11-28 03:34:46,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 45 states have internal predecessors, (57), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-11-28 03:34:46,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 106 transitions. [2024-11-28 03:34:46,760 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 106 transitions. Word has length 38 [2024-11-28 03:34:46,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:34:46,762 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 106 transitions. [2024-11-28 03:34:46,762 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 03:34:46,762 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 106 transitions. [2024-11-28 03:34:46,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-28 03:34:46,767 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:34:46,767 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2024-11-28 03:34:46,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-28 03:34:46,968 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-28 03:34:46,968 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:34:46,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:34:46,969 INFO L85 PathProgramCache]: Analyzing trace with hash 991206135, now seen corresponding path program 1 times [2024-11-28 03:34:46,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:34:46,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547294937] [2024-11-28 03:34:46,969 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:34:46,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:34:46,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 03:34:47,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [893733476] [2024-11-28 03:34:47,004 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:34:47,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:34:47,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:34:47,011 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:34:47,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 03:34:47,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:34:47,087 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 03:34:47,090 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:34:47,156 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-28 03:34:47,156 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:34:47,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:34:47,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547294937] [2024-11-28 03:34:47,157 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 03:34:47,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893733476] [2024-11-28 03:34:47,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893733476] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:34:47,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:34:47,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:34:47,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726330477] [2024-11-28 03:34:47,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:34:47,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:34:47,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:34:47,159 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:34:47,159 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:34:47,159 INFO L87 Difference]: Start difference. First operand 75 states and 106 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-28 03:34:47,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:34:47,281 INFO L93 Difference]: Finished difference Result 104 states and 148 transitions. [2024-11-28 03:34:47,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:34:47,282 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2024-11-28 03:34:47,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:34:47,286 INFO L225 Difference]: With dead ends: 104 [2024-11-28 03:34:47,286 INFO L226 Difference]: Without dead ends: 102 [2024-11-28 03:34:47,287 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 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 03:34:47,288 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:34:47,289 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 112 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:34:47,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-28 03:34:47,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2024-11-28 03:34:47,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 54 states have internal predecessors, (69), 37 states have call successors, (37), 7 states have call predecessors, (37), 7 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2024-11-28 03:34:47,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 142 transitions. [2024-11-28 03:34:47,371 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 142 transitions. Word has length 43 [2024-11-28 03:34:47,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:34:47,371 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 142 transitions. [2024-11-28 03:34:47,372 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-28 03:34:47,372 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 142 transitions. [2024-11-28 03:34:47,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-28 03:34:47,373 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:34:47,373 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2024-11-28 03:34:47,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 03:34:47,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:34:47,578 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:34:47,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:34:47,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1573549508, now seen corresponding path program 1 times [2024-11-28 03:34:47,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:34:47,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48244682] [2024-11-28 03:34:47,580 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:34:47,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:34:47,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 03:34:47,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [518015265] [2024-11-28 03:34:47,616 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:34:47,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:34:47,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:34:47,620 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:34:47,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 03:34:47,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:34:47,697 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 03:34:47,699 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:34:47,781 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-28 03:34:47,782 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:34:47,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:34:47,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48244682] [2024-11-28 03:34:47,782 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 03:34:47,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518015265] [2024-11-28 03:34:47,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518015265] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:34:47,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:34:47,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:34:47,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246425273] [2024-11-28 03:34:47,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:34:47,785 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:34:47,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:34:47,786 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:34:47,786 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:34:47,786 INFO L87 Difference]: Start difference. First operand 98 states and 142 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 03:34:47,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:34:47,919 INFO L93 Difference]: Finished difference Result 148 states and 231 transitions. [2024-11-28 03:34:47,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:34:47,920 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 45 [2024-11-28 03:34:47,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:34:47,922 INFO L225 Difference]: With dead ends: 148 [2024-11-28 03:34:47,922 INFO L226 Difference]: Without dead ends: 146 [2024-11-28 03:34:47,923 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 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 03:34:47,924 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:34:47,924 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 120 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:34:47,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-11-28 03:34:47,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 134. [2024-11-28 03:34:47,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 65 states have internal predecessors, (72), 69 states have call successors, (69), 8 states have call predecessors, (69), 8 states have return successors, (68), 60 states have call predecessors, (68), 68 states have call successors, (68) [2024-11-28 03:34:47,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 209 transitions. [2024-11-28 03:34:47,984 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 209 transitions. Word has length 45 [2024-11-28 03:34:47,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:34:47,985 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 209 transitions. [2024-11-28 03:34:47,985 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 03:34:47,985 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 209 transitions. [2024-11-28 03:34:47,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-28 03:34:47,987 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:34:47,987 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 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] [2024-11-28 03:34:47,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 03:34:48,188 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-28 03:34:48,188 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:34:48,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:34:48,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1799924239, now seen corresponding path program 1 times [2024-11-28 03:34:48,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:34:48,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468327450] [2024-11-28 03:34:48,190 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:34:48,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:34:48,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 03:34:48,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [972883949] [2024-11-28 03:34:48,231 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:34:48,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:34:48,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:34:48,235 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:34:48,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 03:34:48,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:34:48,319 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-28 03:34:48,322 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:34:49,347 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-28 03:34:49,348 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:34:50,159 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-28 03:34:50,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:34:50,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468327450] [2024-11-28 03:34:50,160 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 03:34:50,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972883949] [2024-11-28 03:34:50,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972883949] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:34:50,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:34:50,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-11-28 03:34:50,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879272036] [2024-11-28 03:34:50,161 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:34:50,162 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 03:34:50,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:34:50,163 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 03:34:50,165 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2024-11-28 03:34:50,165 INFO L87 Difference]: Start difference. First operand 134 states and 209 transitions. Second operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2024-11-28 03:34:54,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:34:54,334 INFO L93 Difference]: Finished difference Result 358 states and 580 transitions. [2024-11-28 03:34:54,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-28 03:34:54,335 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 55 [2024-11-28 03:34:54,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:34:54,342 INFO L225 Difference]: With dead ends: 358 [2024-11-28 03:34:54,342 INFO L226 Difference]: Without dead ends: 276 [2024-11-28 03:34:54,348 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=398, Invalid=1672, Unknown=0, NotChecked=0, Total=2070 [2024-11-28 03:34:54,349 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 120 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-28 03:34:54,349 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 285 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-28 03:34:54,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2024-11-28 03:34:54,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 204. [2024-11-28 03:34:54,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 99 states have (on average 1.3131313131313131) internal successors, (130), 106 states have internal predecessors, (130), 93 states have call successors, (93), 11 states have call predecessors, (93), 11 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2024-11-28 03:34:54,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 315 transitions. [2024-11-28 03:34:54,526 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 315 transitions. Word has length 55 [2024-11-28 03:34:54,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:34:54,527 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 315 transitions. [2024-11-28 03:34:54,527 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2024-11-28 03:34:54,527 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 315 transitions. [2024-11-28 03:34:54,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-28 03:34:54,529 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:34:54,529 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 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 03:34:54,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-28 03:34:54,734 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-28 03:34:54,734 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:34:54,735 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:34:54,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1162352819, now seen corresponding path program 1 times [2024-11-28 03:34:54,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:34:54,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817844109] [2024-11-28 03:34:54,736 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:34:54,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:34:54,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 03:34:54,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1585639874] [2024-11-28 03:34:54,779 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:34:54,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:34:54,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:34:54,782 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:34:54,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 03:34:54,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:34:54,859 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-28 03:34:54,862 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:34:55,651 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 03:34:55,652 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:34:55,934 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-28 03:34:55,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:34:55,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817844109] [2024-11-28 03:34:55,934 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 03:34:55,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585639874] [2024-11-28 03:34:55,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585639874] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:34:55,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:34:55,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 22 [2024-11-28 03:34:55,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338815110] [2024-11-28 03:34:55,935 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:34:55,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 03:34:55,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:34:55,937 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 03:34:55,937 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2024-11-28 03:34:55,938 INFO L87 Difference]: Start difference. First operand 204 states and 315 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 19 states have internal predecessors, (45), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2024-11-28 03:34:58,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:34:58,282 INFO L93 Difference]: Finished difference Result 255 states and 394 transitions. [2024-11-28 03:34:58,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 03:34:58,283 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 19 states have internal predecessors, (45), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 59 [2024-11-28 03:34:58,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:34:58,287 INFO L225 Difference]: With dead ends: 255 [2024-11-28 03:34:58,288 INFO L226 Difference]: Without dead ends: 253 [2024-11-28 03:34:58,290 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 03:34:58,291 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 103 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-28 03:34:58,293 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 285 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-28 03:34:58,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2024-11-28 03:34:58,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 212. [2024-11-28 03:34:58,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 105 states have (on average 1.2952380952380953) internal successors, (136), 112 states have internal predecessors, (136), 93 states have call successors, (93), 13 states have call predecessors, (93), 13 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2024-11-28 03:34:58,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 321 transitions. [2024-11-28 03:34:58,472 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 321 transitions. Word has length 59 [2024-11-28 03:34:58,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:34:58,474 INFO L471 AbstractCegarLoop]: Abstraction has 212 states and 321 transitions. [2024-11-28 03:34:58,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 19 states have internal predecessors, (45), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2024-11-28 03:34:58,475 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 321 transitions. [2024-11-28 03:34:58,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-28 03:34:58,476 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:34:58,476 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 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 03:34:58,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 03:34:58,681 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-28 03:34:58,682 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:34:58,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:34:58,682 INFO L85 PathProgramCache]: Analyzing trace with hash 688067520, now seen corresponding path program 2 times [2024-11-28 03:34:58,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:34:58,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362595075] [2024-11-28 03:34:58,683 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:34:58,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:34:58,718 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:34:58,718 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 03:34:58,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1818426440] [2024-11-28 03:34:58,720 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:34:58,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:34:58,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:34:58,725 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:34:58,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 03:34:58,813 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:34:58,813 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:34:58,816 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-28 03:34:58,819 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:34:59,764 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-28 03:34:59,764 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:35:00,600 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-28 03:35:00,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:35:00,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362595075] [2024-11-28 03:35:00,600 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 03:35:00,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818426440] [2024-11-28 03:35:00,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818426440] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:35:00,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:35:00,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2024-11-28 03:35:00,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499220919] [2024-11-28 03:35:00,601 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:35:00,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 03:35:00,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:35:00,603 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 03:35:00,603 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2024-11-28 03:35:00,604 INFO L87 Difference]: Start difference. First operand 212 states and 321 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 24 states have internal predecessors, (41), 6 states have call successors, (17), 3 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 03:35:09,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:35:09,819 INFO L93 Difference]: Finished difference Result 413 states and 629 transitions. [2024-11-28 03:35:09,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-28 03:35:09,821 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 24 states have internal predecessors, (41), 6 states have call successors, (17), 3 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 64 [2024-11-28 03:35:09,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:35:09,827 INFO L225 Difference]: With dead ends: 413 [2024-11-28 03:35:09,827 INFO L226 Difference]: Without dead ends: 352 [2024-11-28 03:35:09,829 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=688, Invalid=2734, Unknown=0, NotChecked=0, Total=3422 [2024-11-28 03:35:09,834 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 174 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2024-11-28 03:35:09,836 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 413 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2024-11-28 03:35:09,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2024-11-28 03:35:10,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 305. [2024-11-28 03:35:10,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 148 states have (on average 1.2972972972972974) internal successors, (192), 159 states have internal predecessors, (192), 137 states have call successors, (137), 19 states have call predecessors, (137), 19 states have return successors, (136), 126 states have call predecessors, (136), 136 states have call successors, (136) [2024-11-28 03:35:10,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 465 transitions. [2024-11-28 03:35:10,125 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 465 transitions. Word has length 64 [2024-11-28 03:35:10,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:35:10,126 INFO L471 AbstractCegarLoop]: Abstraction has 305 states and 465 transitions. [2024-11-28 03:35:10,126 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 24 states have internal predecessors, (41), 6 states have call successors, (17), 3 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 03:35:10,126 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 465 transitions. [2024-11-28 03:35:10,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-28 03:35:10,127 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:35:10,128 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 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] [2024-11-28 03:35:10,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-28 03:35:10,328 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:35:10,328 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:35:10,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:35:10,329 INFO L85 PathProgramCache]: Analyzing trace with hash 947334894, now seen corresponding path program 1 times [2024-11-28 03:35:10,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:35:10,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623227690] [2024-11-28 03:35:10,329 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:35:10,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:35:10,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 03:35:10,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1719273630] [2024-11-28 03:35:10,379 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:35:10,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:35:10,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:35:10,385 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:35:10,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 03:35:10,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:35:10,486 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-11-28 03:35:10,490 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:35:11,708 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2024-11-28 03:35:11,709 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:35:12,747 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-11-28 03:35:12,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:35:12,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623227690] [2024-11-28 03:35:12,747 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 03:35:12,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719273630] [2024-11-28 03:35:12,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719273630] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:35:12,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:35:12,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2024-11-28 03:35:12,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212511803] [2024-11-28 03:35:12,748 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:35:12,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 03:35:12,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:35:12,749 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 03:35:12,750 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2024-11-28 03:35:12,750 INFO L87 Difference]: Start difference. First operand 305 states and 465 transitions. Second operand has 30 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 27 states have internal predecessors, (41), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2024-11-28 03:35:24,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:35:24,582 INFO L93 Difference]: Finished difference Result 529 states and 856 transitions. [2024-11-28 03:35:24,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-11-28 03:35:24,582 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 27 states have internal predecessors, (41), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 79 [2024-11-28 03:35:24,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:35:24,588 INFO L225 Difference]: With dead ends: 529 [2024-11-28 03:35:24,588 INFO L226 Difference]: Without dead ends: 521 [2024-11-28 03:35:24,591 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1867 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1147, Invalid=5993, Unknown=0, NotChecked=0, Total=7140 [2024-11-28 03:35:24,592 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 190 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 1422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-11-28 03:35:24,592 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 673 Invalid, 1422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 1182 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2024-11-28 03:35:24,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2024-11-28 03:35:24,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 377. [2024-11-28 03:35:25,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 178 states have (on average 1.3202247191011236) internal successors, (235), 191 states have internal predecessors, (235), 177 states have call successors, (177), 21 states have call predecessors, (177), 21 states have return successors, (176), 164 states have call predecessors, (176), 176 states have call successors, (176) [2024-11-28 03:35:25,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 588 transitions. [2024-11-28 03:35:25,005 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 588 transitions. Word has length 79 [2024-11-28 03:35:25,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:35:25,006 INFO L471 AbstractCegarLoop]: Abstraction has 377 states and 588 transitions. [2024-11-28 03:35:25,006 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 27 states have internal predecessors, (41), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2024-11-28 03:35:25,006 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 588 transitions. [2024-11-28 03:35:25,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-28 03:35:25,008 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:35:25,008 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:35:25,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 03:35:25,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-28 03:35:25,213 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:35:25,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:35:25,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1617309069, now seen corresponding path program 2 times [2024-11-28 03:35:25,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:35:25,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241368394] [2024-11-28 03:35:25,214 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:35:25,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:35:25,249 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:35:25,249 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:35:25,624 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 28 proven. 11 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2024-11-28 03:35:25,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:35:25,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241368394] [2024-11-28 03:35:25,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241368394] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:35:25,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417230813] [2024-11-28 03:35:25,625 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:35:25,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:35:25,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:35:25,630 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:35:25,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 03:35:25,719 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:35:25,719 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:35:25,721 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 03:35:25,723 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:35:25,819 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 28 proven. 11 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2024-11-28 03:35:25,819 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:35:25,968 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 28 proven. 11 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2024-11-28 03:35:25,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417230813] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:35:25,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:35:25,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 13 [2024-11-28 03:35:25,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953491347] [2024-11-28 03:35:25,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:35:25,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 03:35:25,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:35:25,970 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 03:35:25,970 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-11-28 03:35:25,970 INFO L87 Difference]: Start difference. First operand 377 states and 588 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-28 03:35:27,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:35:27,134 INFO L93 Difference]: Finished difference Result 674 states and 1050 transitions. [2024-11-28 03:35:27,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 03:35:27,134 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 84 [2024-11-28 03:35:27,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:35:27,139 INFO L225 Difference]: With dead ends: 674 [2024-11-28 03:35:27,140 INFO L226 Difference]: Without dead ends: 426 [2024-11-28 03:35:27,142 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 164 SyntacticMatches, 8 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2024-11-28 03:35:27,143 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 57 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:35:27,143 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 336 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 03:35:27,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2024-11-28 03:35:27,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 296. [2024-11-28 03:35:27,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 154 states have (on average 1.2857142857142858) internal successors, (198), 155 states have internal predecessors, (198), 121 states have call successors, (121), 20 states have call predecessors, (121), 20 states have return successors, (120), 120 states have call predecessors, (120), 120 states have call successors, (120) [2024-11-28 03:35:27,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 439 transitions. [2024-11-28 03:35:27,484 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 439 transitions. Word has length 84 [2024-11-28 03:35:27,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:35:27,484 INFO L471 AbstractCegarLoop]: Abstraction has 296 states and 439 transitions. [2024-11-28 03:35:27,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-28 03:35:27,485 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 439 transitions. [2024-11-28 03:35:27,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-28 03:35:27,487 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:35:27,487 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 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] [2024-11-28 03:35:27,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 03:35:27,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-28 03:35:27,688 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:35:27,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:35:27,688 INFO L85 PathProgramCache]: Analyzing trace with hash 943756587, now seen corresponding path program 1 times [2024-11-28 03:35:27,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:35:27,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770814247] [2024-11-28 03:35:27,688 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:35:27,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:35:27,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 03:35:27,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [856012139] [2024-11-28 03:35:27,718 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:35:27,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:35:27,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:35:27,725 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:35:27,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 03:35:27,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:35:27,811 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-28 03:35:27,814 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:35:27,989 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2024-11-28 03:35:27,989 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:35:28,162 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2024-11-28 03:35:28,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:35:28,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770814247] [2024-11-28 03:35:28,162 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 03:35:28,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856012139] [2024-11-28 03:35:28,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856012139] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 03:35:28,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:35:28,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2024-11-28 03:35:28,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097869375] [2024-11-28 03:35:28,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:35:28,164 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:35:28,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:35:28,164 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:35:28,165 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-11-28 03:35:28,165 INFO L87 Difference]: Start difference. First operand 296 states and 439 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2024-11-28 03:35:28,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:35:28,467 INFO L93 Difference]: Finished difference Result 306 states and 447 transitions. [2024-11-28 03:35:28,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:35:28,468 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 92 [2024-11-28 03:35:28,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:35:28,470 INFO L225 Difference]: With dead ends: 306 [2024-11-28 03:35:28,470 INFO L226 Difference]: Without dead ends: 304 [2024-11-28 03:35:28,471 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:35:28,472 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:35:28,472 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 116 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 03:35:28,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2024-11-28 03:35:28,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2024-11-28 03:35:28,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 160 states have (on average 1.275) internal successors, (204), 161 states have internal predecessors, (204), 121 states have call successors, (121), 22 states have call predecessors, (121), 22 states have return successors, (120), 120 states have call predecessors, (120), 120 states have call successors, (120) [2024-11-28 03:35:28,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 445 transitions. [2024-11-28 03:35:28,757 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 445 transitions. Word has length 92 [2024-11-28 03:35:28,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:35:28,758 INFO L471 AbstractCegarLoop]: Abstraction has 304 states and 445 transitions. [2024-11-28 03:35:28,758 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2024-11-28 03:35:28,758 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 445 transitions. [2024-11-28 03:35:28,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-11-28 03:35:28,760 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:35:28,760 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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 03:35:28,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 03:35:28,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:35:28,961 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:35:28,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:35:28,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1251272623, now seen corresponding path program 2 times [2024-11-28 03:35:28,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:35:28,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833159951] [2024-11-28 03:35:28,962 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:35:28,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:35:28,990 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:35:28,991 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 03:35:28,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [461029119] [2024-11-28 03:35:28,992 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:35:28,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:35:28,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:35:29,001 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:35:29,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 03:35:29,100 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:35:29,100 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:35:29,102 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-11-28 03:35:29,106 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:35:30,552 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2024-11-28 03:35:30,553 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:35:31,564 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-11-28 03:35:31,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:35:31,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833159951] [2024-11-28 03:35:31,564 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 03:35:31,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461029119] [2024-11-28 03:35:31,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461029119] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:35:31,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:35:31,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2024-11-28 03:35:31,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976426212] [2024-11-28 03:35:31,565 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:35:31,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 03:35:31,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:35:31,566 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 03:35:31,567 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2024-11-28 03:35:31,567 INFO L87 Difference]: Start difference. First operand 304 states and 445 transitions. Second operand has 25 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 states have internal predecessors, (36), 10 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2024-11-28 03:35:37,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:35:37,710 INFO L93 Difference]: Finished difference Result 488 states and 722 transitions. [2024-11-28 03:35:37,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-28 03:35:37,711 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 states have internal predecessors, (36), 10 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) Word has length 97 [2024-11-28 03:35:37,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:35:37,715 INFO L225 Difference]: With dead ends: 488 [2024-11-28 03:35:37,715 INFO L226 Difference]: Without dead ends: 364 [2024-11-28 03:35:37,717 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 167 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=764, Invalid=2658, Unknown=0, NotChecked=0, Total=3422 [2024-11-28 03:35:37,719 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 107 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:35:37,719 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 468 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-28 03:35:37,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2024-11-28 03:35:38,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 348. [2024-11-28 03:35:38,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 178 states have (on average 1.2865168539325842) internal successors, (229), 179 states have internal predecessors, (229), 145 states have call successors, (145), 24 states have call predecessors, (145), 24 states have return successors, (144), 144 states have call predecessors, (144), 144 states have call successors, (144) [2024-11-28 03:35:38,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 518 transitions. [2024-11-28 03:35:38,099 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 518 transitions. Word has length 97 [2024-11-28 03:35:38,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:35:38,100 INFO L471 AbstractCegarLoop]: Abstraction has 348 states and 518 transitions. [2024-11-28 03:35:38,100 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 states have internal predecessors, (36), 10 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2024-11-28 03:35:38,100 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 518 transitions. [2024-11-28 03:35:38,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-28 03:35:38,103 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:35:38,103 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 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] [2024-11-28 03:35:38,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-28 03:35:38,303 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 03:35:38,303 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:35:38,304 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:35:38,304 INFO L85 PathProgramCache]: Analyzing trace with hash -341300858, now seen corresponding path program 3 times [2024-11-28 03:35:38,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:35:38,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436768423] [2024-11-28 03:35:38,304 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:35:38,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:35:38,353 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-28 03:35:38,353 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 03:35:38,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1177442251] [2024-11-28 03:35:38,358 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:35:38,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:35:38,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:35:38,361 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:35:38,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 03:35:38,445 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-28 03:35:38,445 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:35:38,447 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-11-28 03:35:38,450 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:35:39,593 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 80 proven. 29 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2024-11-28 03:35:39,593 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:35:40,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:35:40,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436768423] [2024-11-28 03:35:40,933 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 03:35:40,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177442251] [2024-11-28 03:35:40,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177442251] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:35:40,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:35:40,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-11-28 03:35:40,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568276997] [2024-11-28 03:35:40,934 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 03:35:40,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 03:35:40,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:35:40,935 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 03:35:40,935 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2024-11-28 03:35:40,935 INFO L87 Difference]: Start difference. First operand 348 states and 518 transitions. Second operand has 19 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2024-11-28 03:35:42,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:35:42,152 INFO L93 Difference]: Finished difference Result 418 states and 610 transitions. [2024-11-28 03:35:42,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 03:35:42,153 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) Word has length 99 [2024-11-28 03:35:42,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:35:42,156 INFO L225 Difference]: With dead ends: 418 [2024-11-28 03:35:42,156 INFO L226 Difference]: Without dead ends: 411 [2024-11-28 03:35:42,157 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 03:35:42,157 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 31 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 03:35:42,158 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 278 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 03:35:42,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2024-11-28 03:35:42,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 400. [2024-11-28 03:35:42,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 205 states have (on average 1.2829268292682927) internal successors, (263), 206 states have internal predecessors, (263), 165 states have call successors, (165), 29 states have call predecessors, (165), 29 states have return successors, (164), 164 states have call predecessors, (164), 164 states have call successors, (164) [2024-11-28 03:35:42,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 592 transitions. [2024-11-28 03:35:42,589 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 592 transitions. Word has length 99 [2024-11-28 03:35:42,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:35:42,590 INFO L471 AbstractCegarLoop]: Abstraction has 400 states and 592 transitions. [2024-11-28 03:35:42,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2024-11-28 03:35:42,590 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 592 transitions. [2024-11-28 03:35:42,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-28 03:35:42,593 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:35:42,593 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:35:42,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-28 03:35:42,793 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 03:35:42,794 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:35:42,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:35:42,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1513681312, now seen corresponding path program 4 times [2024-11-28 03:35:42,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:35:42,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21289878] [2024-11-28 03:35:42,794 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:35:42,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:35:42,828 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:35:42,828 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 03:35:42,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1376588709] [2024-11-28 03:35:42,830 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:35:42,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:35:42,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:35:42,834 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:35:42,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 03:35:42,948 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:35:42,948 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:35:42,951 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-11-28 03:35:42,956 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:35:44,929 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 56 proven. 39 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2024-11-28 03:35:44,929 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:35:53,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:35:53,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21289878] [2024-11-28 03:35:53,840 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 03:35:53,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376588709] [2024-11-28 03:35:53,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376588709] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:35:53,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:35:53,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-11-28 03:35:53,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518219121] [2024-11-28 03:35:53,840 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 03:35:53,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 03:35:53,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:35:53,841 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 03:35:53,841 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1291, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 03:35:53,841 INFO L87 Difference]: Start difference. First operand 400 states and 592 transitions. Second operand has 23 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2024-11-28 03:35:56,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:35:56,085 INFO L93 Difference]: Finished difference Result 579 states and 839 transitions. [2024-11-28 03:35:56,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 03:35:56,087 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 102 [2024-11-28 03:35:56,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:35:56,093 INFO L225 Difference]: With dead ends: 579 [2024-11-28 03:35:56,093 INFO L226 Difference]: Without dead ends: 453 [2024-11-28 03:35:56,094 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=326, Invalid=2026, Unknown=0, NotChecked=0, Total=2352 [2024-11-28 03:35:56,099 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 65 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 03:35:56,099 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 262 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 03:35:56,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2024-11-28 03:35:56,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 415. [2024-11-28 03:35:56,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 214 states have (on average 1.2710280373831775) internal successors, (272), 215 states have internal predecessors, (272), 169 states have call successors, (169), 31 states have call predecessors, (169), 31 states have return successors, (168), 168 states have call predecessors, (168), 168 states have call successors, (168) [2024-11-28 03:35:56,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 609 transitions. [2024-11-28 03:35:56,499 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 609 transitions. Word has length 102 [2024-11-28 03:35:56,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:35:56,500 INFO L471 AbstractCegarLoop]: Abstraction has 415 states and 609 transitions. [2024-11-28 03:35:56,500 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2024-11-28 03:35:56,500 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 609 transitions. [2024-11-28 03:35:56,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-28 03:35:56,503 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:35:56,503 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:35:56,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-28 03:35:56,707 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 03:35:56,708 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:35:56,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:35:56,708 INFO L85 PathProgramCache]: Analyzing trace with hash 538056254, now seen corresponding path program 5 times [2024-11-28 03:35:56,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:35:56,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482338937] [2024-11-28 03:35:56,709 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:35:56,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:35:56,786 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-11-28 03:35:56,787 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 03:35:56,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1646204378] [2024-11-28 03:35:56,788 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:35:56,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:35:56,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:35:56,795 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:35:56,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 03:35:56,967 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-11-28 03:35:56,967 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:35:56,970 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-11-28 03:35:56,973 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:35:58,889 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 43 proven. 76 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2024-11-28 03:35:58,890 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:36:02,249 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 43 proven. 67 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2024-11-28 03:36:02,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:36:02,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482338937] [2024-11-28 03:36:02,249 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 03:36:02,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646204378] [2024-11-28 03:36:02,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646204378] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:36:02,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:36:02,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 38 [2024-11-28 03:36:02,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458792478] [2024-11-28 03:36:02,250 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:36:02,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-28 03:36:02,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:36:02,252 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-28 03:36:02,252 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1187, Unknown=0, NotChecked=0, Total=1406 [2024-11-28 03:36:02,253 INFO L87 Difference]: Start difference. First operand 415 states and 609 transitions. Second operand has 38 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 36 states have internal predecessors, (53), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 10 states have call predecessors, (32), 9 states have call successors, (32) [2024-11-28 03:36:19,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 03:36:36,217 WARN L539 Checker$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 03:36:42,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.40s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 03:36:46,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 03:36:53,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:36:53,571 INFO L93 Difference]: Finished difference Result 577 states and 840 transitions. [2024-11-28 03:36:53,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-11-28 03:36:53,572 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 36 states have internal predecessors, (53), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 10 states have call predecessors, (32), 9 states have call successors, (32) Word has length 102 [2024-11-28 03:36:53,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:36:53,576 INFO L225 Difference]: With dead ends: 577 [2024-11-28 03:36:53,577 INFO L226 Difference]: Without dead ends: 519 [2024-11-28 03:36:53,578 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1795 ImplicationChecksByTransitivity, 34.6s TimeCoverageRelationStatistics Valid=1477, Invalid=5662, Unknown=1, NotChecked=0, Total=7140 [2024-11-28 03:36:53,579 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 191 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 366 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 1389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.5s IncrementalHoareTripleChecker+Time [2024-11-28 03:36:53,579 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 541 Invalid, 1389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 1021 Invalid, 2 Unknown, 0 Unchecked, 18.5s Time] [2024-11-28 03:36:53,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2024-11-28 03:36:54,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 461. [2024-11-28 03:36:54,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 236 states have (on average 1.2838983050847457) internal successors, (303), 237 states have internal predecessors, (303), 189 states have call successors, (189), 35 states have call predecessors, (189), 35 states have return successors, (188), 188 states have call predecessors, (188), 188 states have call successors, (188) [2024-11-28 03:36:54,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 680 transitions. [2024-11-28 03:36:54,208 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 680 transitions. Word has length 102 [2024-11-28 03:36:54,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:36:54,208 INFO L471 AbstractCegarLoop]: Abstraction has 461 states and 680 transitions. [2024-11-28 03:36:54,209 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 36 states have internal predecessors, (53), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 10 states have call predecessors, (32), 9 states have call successors, (32) [2024-11-28 03:36:54,209 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 680 transitions. [2024-11-28 03:36:54,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-11-28 03:36:54,212 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:36:54,212 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:36:54,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-28 03:36:54,412 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:36:54,413 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:36:54,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:36:54,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1493813819, now seen corresponding path program 2 times [2024-11-28 03:36:54,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:36:54,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101679055] [2024-11-28 03:36:54,414 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:36:54,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:36:54,457 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:36:54,457 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:36:55,389 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2024-11-28 03:36:55,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:36:55,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101679055] [2024-11-28 03:36:55,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101679055] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:36:55,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825249992] [2024-11-28 03:36:55,389 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:36:55,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:36:55,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:36:55,392 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:36:55,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 03:36:55,514 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:36:55,515 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:36:55,517 INFO L256 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 03:36:55,522 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:36:56,024 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 88 proven. 38 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2024-11-28 03:36:56,025 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:36:56,744 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 43 proven. 38 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2024-11-28 03:36:56,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825249992] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:36:56,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:36:56,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 17] total 40 [2024-11-28 03:36:56,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736043599] [2024-11-28 03:36:56,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:36:56,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-28 03:36:56,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:36:56,747 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-28 03:36:56,747 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1362, Unknown=0, NotChecked=0, Total=1560 [2024-11-28 03:36:56,748 INFO L87 Difference]: Start difference. First operand 461 states and 680 transitions. Second operand has 40 states, 40 states have (on average 1.75) internal successors, (70), 37 states have internal predecessors, (70), 14 states have call successors, (47), 2 states have call predecessors, (47), 3 states have return successors, (48), 14 states have call predecessors, (48), 14 states have call successors, (48) [2024-11-28 03:37:06,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:37:06,051 INFO L93 Difference]: Finished difference Result 1080 states and 1764 transitions. [2024-11-28 03:37:06,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2024-11-28 03:37:06,052 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.75) internal successors, (70), 37 states have internal predecessors, (70), 14 states have call successors, (47), 2 states have call predecessors, (47), 3 states have return successors, (48), 14 states have call predecessors, (48), 14 states have call successors, (48) Word has length 111 [2024-11-28 03:37:06,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:37:06,059 INFO L225 Difference]: With dead ends: 1080 [2024-11-28 03:37:06,059 INFO L226 Difference]: Without dead ends: 970 [2024-11-28 03:37:06,064 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4999 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2871, Invalid=13899, Unknown=0, NotChecked=0, Total=16770 [2024-11-28 03:37:06,065 INFO L435 NwaCegarLoop]: 109 mSDtfsCounter, 612 mSDsluCounter, 1086 mSDsCounter, 0 mSdLazyCounter, 1451 mSolverCounterSat, 884 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 1195 SdHoareTripleChecker+Invalid, 2335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 884 IncrementalHoareTripleChecker+Valid, 1451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:37:06,065 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [612 Valid, 1195 Invalid, 2335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [884 Valid, 1451 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-28 03:37:06,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2024-11-28 03:37:07,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 572. [2024-11-28 03:37:07,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 279 states have (on average 1.3046594982078854) internal successors, (364), 280 states have internal predecessors, (364), 257 states have call successors, (257), 35 states have call predecessors, (257), 35 states have return successors, (256), 256 states have call predecessors, (256), 256 states have call successors, (256) [2024-11-28 03:37:07,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 877 transitions. [2024-11-28 03:37:07,067 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 877 transitions. Word has length 111 [2024-11-28 03:37:07,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:37:07,067 INFO L471 AbstractCegarLoop]: Abstraction has 572 states and 877 transitions. [2024-11-28 03:37:07,068 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.75) internal successors, (70), 37 states have internal predecessors, (70), 14 states have call successors, (47), 2 states have call predecessors, (47), 3 states have return successors, (48), 14 states have call predecessors, (48), 14 states have call successors, (48) [2024-11-28 03:37:07,068 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 877 transitions. [2024-11-28 03:37:07,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-28 03:37:07,071 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:37:07,071 INFO L218 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:37:07,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-28 03:37:07,274 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:37:07,275 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:37:07,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:37:07,275 INFO L85 PathProgramCache]: Analyzing trace with hash 965703254, now seen corresponding path program 3 times [2024-11-28 03:37:07,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:37:07,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370377698] [2024-11-28 03:37:07,275 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:37:07,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:37:07,346 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-28 03:37:07,346 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 03:37:07,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [898028363] [2024-11-28 03:37:07,348 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:37:07,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:37:07,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:37:07,351 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:37:07,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 03:37:07,445 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 03:37:07,445 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:37:07,447 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-28 03:37:07,451 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:37:08,666 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 75 proven. 39 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2024-11-28 03:37:08,666 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:37:08,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:37:08,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370377698] [2024-11-28 03:37:08,816 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 03:37:08,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898028363] [2024-11-28 03:37:08,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898028363] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:37:08,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:37:08,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-11-28 03:37:08,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035677202] [2024-11-28 03:37:08,817 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 03:37:08,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 03:37:08,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:37:08,818 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 03:37:08,818 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2024-11-28 03:37:08,819 INFO L87 Difference]: Start difference. First operand 572 states and 877 transitions. Second operand has 21 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2024-11-28 03:37:11,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:37:11,697 INFO L93 Difference]: Finished difference Result 675 states and 1033 transitions. [2024-11-28 03:37:11,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 03:37:11,697 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) Word has length 113 [2024-11-28 03:37:11,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:37:11,703 INFO L225 Difference]: With dead ends: 675 [2024-11-28 03:37:11,703 INFO L226 Difference]: Without dead ends: 673 [2024-11-28 03:37:11,704 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=187, Invalid=869, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 03:37:11,705 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 52 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:37:11,705 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 489 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-28 03:37:11,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2024-11-28 03:37:12,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 630. [2024-11-28 03:37:12,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 305 states have (on average 1.301639344262295) internal successors, (397), 306 states have internal predecessors, (397), 285 states have call successors, (285), 39 states have call predecessors, (285), 39 states have return successors, (284), 284 states have call predecessors, (284), 284 states have call successors, (284) [2024-11-28 03:37:12,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 966 transitions. [2024-11-28 03:37:12,967 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 966 transitions. Word has length 113 [2024-11-28 03:37:12,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:37:12,968 INFO L471 AbstractCegarLoop]: Abstraction has 630 states and 966 transitions. [2024-11-28 03:37:12,968 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2024-11-28 03:37:12,968 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 966 transitions. [2024-11-28 03:37:12,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-11-28 03:37:12,971 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:37:12,971 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 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] [2024-11-28 03:37:12,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-28 03:37:13,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:37:13,172 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:37:13,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:37:13,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1719467343, now seen corresponding path program 6 times [2024-11-28 03:37:13,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:37:13,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790563051] [2024-11-28 03:37:13,173 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:37:13,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:37:13,201 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-28 03:37:13,201 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:37:13,474 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 35 proven. 32 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2024-11-28 03:37:13,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:37:13,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790563051] [2024-11-28 03:37:13,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790563051] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:37:13,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486548595] [2024-11-28 03:37:13,477 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:37:13,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:37:13,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:37:13,480 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:37:13,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-28 03:37:13,649 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-28 03:37:13,649 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:37:13,651 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 03:37:13,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:37:13,826 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 35 proven. 32 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2024-11-28 03:37:13,827 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:37:14,062 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 35 proven. 32 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2024-11-28 03:37:14,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486548595] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:37:14,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:37:14,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 14 [2024-11-28 03:37:14,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990475524] [2024-11-28 03:37:14,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:37:14,063 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 03:37:14,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:37:14,064 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 03:37:14,064 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:37:14,064 INFO L87 Difference]: Start difference. First operand 630 states and 966 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2024-11-28 03:37:15,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:37:15,625 INFO L93 Difference]: Finished difference Result 1005 states and 1549 transitions. [2024-11-28 03:37:15,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:37:15,626 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) Word has length 120 [2024-11-28 03:37:15,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:37:15,632 INFO L225 Difference]: With dead ends: 1005 [2024-11-28 03:37:15,632 INFO L226 Difference]: Without dead ends: 647 [2024-11-28 03:37:15,634 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 228 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2024-11-28 03:37:15,636 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 15 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:37:15,637 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 342 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 03:37:15,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2024-11-28 03:37:16,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 613. [2024-11-28 03:37:16,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 299 states have (on average 1.2709030100334449) internal successors, (380), 309 states have internal predecessors, (380), 274 states have call successors, (274), 39 states have call predecessors, (274), 39 states have return successors, (273), 264 states have call predecessors, (273), 273 states have call successors, (273) [2024-11-28 03:37:16,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 927 transitions. [2024-11-28 03:37:16,722 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 927 transitions. Word has length 120 [2024-11-28 03:37:16,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:37:16,722 INFO L471 AbstractCegarLoop]: Abstraction has 613 states and 927 transitions. [2024-11-28 03:37:16,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2024-11-28 03:37:16,723 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 927 transitions. [2024-11-28 03:37:16,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-11-28 03:37:16,724 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:37:16,724 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1] [2024-11-28 03:37:16,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-28 03:37:16,925 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:37:16,925 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:37:16,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:37:16,926 INFO L85 PathProgramCache]: Analyzing trace with hash 794682830, now seen corresponding path program 7 times [2024-11-28 03:37:16,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:37:16,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366680878] [2024-11-28 03:37:16,926 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:37:16,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:37:16,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:37:17,529 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 52 proven. 29 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2024-11-28 03:37:17,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:37:17,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366680878] [2024-11-28 03:37:17,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366680878] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:37:17,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249545002] [2024-11-28 03:37:17,530 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:37:17,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:37:17,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:37:17,533 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:37:17,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 03:37:17,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:37:17,648 INFO L256 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 03:37:17,652 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:37:18,226 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 39 proven. 39 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-11-28 03:37:18,227 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:37:18,881 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 38 proven. 40 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-11-28 03:37:18,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249545002] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:37:18,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:37:18,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2024-11-28 03:37:18,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250945176] [2024-11-28 03:37:18,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:37:18,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-28 03:37:18,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:37:18,883 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-28 03:37:18,883 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2024-11-28 03:37:18,884 INFO L87 Difference]: Start difference. First operand 613 states and 927 transitions. Second operand has 32 states, 32 states have (on average 1.75) internal successors, (56), 29 states have internal predecessors, (56), 17 states have call successors, (58), 2 states have call predecessors, (58), 2 states have return successors, (59), 17 states have call predecessors, (59), 17 states have call successors, (59) [2024-11-28 03:37:24,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:37:24,314 INFO L93 Difference]: Finished difference Result 924 states and 1452 transitions. [2024-11-28 03:37:24,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-28 03:37:24,315 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 29 states have internal predecessors, (56), 17 states have call successors, (58), 2 states have call predecessors, (58), 2 states have return successors, (59), 17 states have call predecessors, (59), 17 states have call successors, (59) Word has length 121 [2024-11-28 03:37:24,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:37:24,320 INFO L225 Difference]: With dead ends: 924 [2024-11-28 03:37:24,320 INFO L226 Difference]: Without dead ends: 856 [2024-11-28 03:37:24,322 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1118 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1383, Invalid=4779, Unknown=0, NotChecked=0, Total=6162 [2024-11-28 03:37:24,323 INFO L435 NwaCegarLoop]: 78 mSDtfsCounter, 208 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 1102 SdHoareTripleChecker+Invalid, 1278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:37:24,324 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 1102 Invalid, 1278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 1045 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-28 03:37:24,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2024-11-28 03:37:26,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 742. [2024-11-28 03:37:26,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 344 states have (on average 1.2761627906976745) internal successors, (439), 354 states have internal predecessors, (439), 358 states have call successors, (358), 39 states have call predecessors, (358), 39 states have return successors, (357), 348 states have call predecessors, (357), 357 states have call successors, (357) [2024-11-28 03:37:26,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 1154 transitions. [2024-11-28 03:37:26,181 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 1154 transitions. Word has length 121 [2024-11-28 03:37:26,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:37:26,182 INFO L471 AbstractCegarLoop]: Abstraction has 742 states and 1154 transitions. [2024-11-28 03:37:26,182 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 29 states have internal predecessors, (56), 17 states have call successors, (58), 2 states have call predecessors, (58), 2 states have return successors, (59), 17 states have call predecessors, (59), 17 states have call successors, (59) [2024-11-28 03:37:26,183 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 1154 transitions. [2024-11-28 03:37:26,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-28 03:37:26,186 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:37:26,186 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:37:26,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-28 03:37:26,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-28 03:37:26,392 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:37:26,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:37:26,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1037427739, now seen corresponding path program 8 times [2024-11-28 03:37:26,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:37:26,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008218780] [2024-11-28 03:37:26,393 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:37:26,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:37:26,426 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:37:26,426 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 03:37:26,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2045146562] [2024-11-28 03:37:26,428 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:37:26,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:37:26,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:37:26,432 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:37:26,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-28 03:37:26,566 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:37:26,566 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:37:26,569 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-11-28 03:37:26,574 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:37:28,538 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 73 proven. 54 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2024-11-28 03:37:28,538 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:37:28,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:37:28,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008218780] [2024-11-28 03:37:28,997 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 03:37:28,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045146562] [2024-11-28 03:37:28,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045146562] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:37:28,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:37:28,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-11-28 03:37:28,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982030849] [2024-11-28 03:37:28,998 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 03:37:28,999 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 03:37:28,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:37:29,000 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 03:37:29,000 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2024-11-28 03:37:29,000 INFO L87 Difference]: Start difference. First operand 742 states and 1154 transitions. Second operand has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 19 states have internal predecessors, (34), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2024-11-28 03:37:32,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:37:32,173 INFO L93 Difference]: Finished difference Result 774 states and 1199 transitions. [2024-11-28 03:37:32,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 03:37:32,173 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 19 states have internal predecessors, (34), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 123 [2024-11-28 03:37:32,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:37:32,179 INFO L225 Difference]: With dead ends: 774 [2024-11-28 03:37:32,180 INFO L226 Difference]: Without dead ends: 763 [2024-11-28 03:37:32,181 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=161, Invalid=1245, Unknown=0, NotChecked=0, Total=1406 [2024-11-28 03:37:32,181 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 52 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 03:37:32,182 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 473 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 03:37:32,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2024-11-28 03:37:33,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 747. [2024-11-28 03:37:33,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 345 states have (on average 1.2753623188405796) internal successors, (440), 355 states have internal predecessors, (440), 362 states have call successors, (362), 39 states have call predecessors, (362), 39 states have return successors, (361), 352 states have call predecessors, (361), 361 states have call successors, (361) [2024-11-28 03:37:33,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1163 transitions. [2024-11-28 03:37:33,569 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 1163 transitions. Word has length 123 [2024-11-28 03:37:33,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:37:33,570 INFO L471 AbstractCegarLoop]: Abstraction has 747 states and 1163 transitions. [2024-11-28 03:37:33,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 19 states have internal predecessors, (34), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2024-11-28 03:37:33,570 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 1163 transitions. [2024-11-28 03:37:33,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-11-28 03:37:33,574 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:37:33,574 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:37:33,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-28 03:37:33,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-28 03:37:33,779 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:37:33,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:37:33,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1350783763, now seen corresponding path program 9 times [2024-11-28 03:37:33,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:37:33,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073059012] [2024-11-28 03:37:33,781 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:37:33,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:37:33,835 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-28 03:37:33,835 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 03:37:33,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [136678374] [2024-11-28 03:37:33,837 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:37:33,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:37:33,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:37:33,839 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:37:33,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-28 03:37:33,985 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-28 03:37:33,986 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:37:33,994 INFO L256 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-11-28 03:37:33,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:37:38,228 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 137 proven. 58 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2024-11-28 03:37:38,228 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:37:40,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:37:40,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073059012] [2024-11-28 03:37:40,538 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 03:37:40,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136678374] [2024-11-28 03:37:40,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136678374] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:37:40,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:37:40,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-11-28 03:37:40,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115328511] [2024-11-28 03:37:40,539 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 03:37:40,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 03:37:40,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:37:40,540 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 03:37:40,540 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1036, Unknown=2, NotChecked=0, Total=1190 [2024-11-28 03:37:40,541 INFO L87 Difference]: Start difference. First operand 747 states and 1163 transitions. Second operand has 24 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) [2024-11-28 03:37:45,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 03:37:49,267 WARN L539 Checker$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 03:37:54,063 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 03:37:56,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:37:56,202 INFO L93 Difference]: Finished difference Result 861 states and 1321 transitions. [2024-11-28 03:37:56,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 03:37:56,203 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) Word has length 126 [2024-11-28 03:37:56,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:37:56,209 INFO L225 Difference]: With dead ends: 861 [2024-11-28 03:37:56,209 INFO L226 Difference]: Without dead ends: 852 [2024-11-28 03:37:56,210 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=256, Invalid=1722, Unknown=2, NotChecked=0, Total=1980 [2024-11-28 03:37:56,211 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 51 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 82 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:37:56,211 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 549 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 877 Invalid, 3 Unknown, 0 Unchecked, 13.3s Time] [2024-11-28 03:37:56,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2024-11-28 03:37:58,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 817. [2024-11-28 03:37:58,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 382 states have (on average 1.2670157068062826) internal successors, (484), 393 states have internal predecessors, (484), 388 states have call successors, (388), 46 states have call predecessors, (388), 46 states have return successors, (387), 377 states have call predecessors, (387), 387 states have call successors, (387) [2024-11-28 03:37:58,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1259 transitions. [2024-11-28 03:37:58,090 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1259 transitions. Word has length 126 [2024-11-28 03:37:58,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:37:58,091 INFO L471 AbstractCegarLoop]: Abstraction has 817 states and 1259 transitions. [2024-11-28 03:37:58,091 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) [2024-11-28 03:37:58,091 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1259 transitions. [2024-11-28 03:37:58,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-11-28 03:37:58,094 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:37:58,094 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:37:58,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-28 03:37:58,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-28 03:37:58,295 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:37:58,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:37:58,296 INFO L85 PathProgramCache]: Analyzing trace with hash 799624170, now seen corresponding path program 10 times [2024-11-28 03:37:58,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:37:58,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937434683] [2024-11-28 03:37:58,296 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:37:58,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:37:58,342 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:37:58,342 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 03:37:58,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1184676272] [2024-11-28 03:37:58,344 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:37:58,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:37:58,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:37:58,347 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:37:58,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-28 03:37:58,519 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:37:58,519 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:37:58,524 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 118 conjuncts are in the unsatisfiable core [2024-11-28 03:37:58,532 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:38:01,436 INFO L134 CoverageAnalysis]: Checked inductivity of 593 backedges. 108 proven. 77 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2024-11-28 03:38:01,436 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:38:03,306 INFO L134 CoverageAnalysis]: Checked inductivity of 593 backedges. 133 proven. 33 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2024-11-28 03:38:03,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:38:03,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937434683] [2024-11-28 03:38:03,306 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 03:38:03,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184676272] [2024-11-28 03:38:03,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184676272] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:38:03,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:38:03,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 15] total 39 [2024-11-28 03:38:03,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464435036] [2024-11-28 03:38:03,307 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:38:03,307 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-28 03:38:03,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:38:03,308 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-28 03:38:03,308 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1274, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 03:38:03,309 INFO L87 Difference]: Start difference. First operand 817 states and 1259 transitions. Second operand has 39 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 35 states have internal predecessors, (61), 15 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (39), 11 states have call predecessors, (39), 13 states have call successors, (39) [2024-11-28 03:38:14,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:38:14,901 INFO L93 Difference]: Finished difference Result 879 states and 1332 transitions. [2024-11-28 03:38:14,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2024-11-28 03:38:14,902 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 35 states have internal predecessors, (61), 15 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (39), 11 states have call predecessors, (39), 13 states have call successors, (39) Word has length 128 [2024-11-28 03:38:14,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:38:14,906 INFO L225 Difference]: With dead ends: 879 [2024-11-28 03:38:14,906 INFO L226 Difference]: Without dead ends: 843 [2024-11-28 03:38:14,907 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=1287, Invalid=6903, Unknown=0, NotChecked=0, Total=8190 [2024-11-28 03:38:14,908 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 185 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 1445 mSolverCounterSat, 375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 1820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 1445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-11-28 03:38:14,908 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 449 Invalid, 1820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [375 Valid, 1445 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-11-28 03:38:14,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2024-11-28 03:38:16,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 817. [2024-11-28 03:38:16,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 379 states have (on average 1.2638522427440633) internal successors, (479), 392 states have internal predecessors, (479), 392 states have call successors, (392), 45 states have call predecessors, (392), 45 states have return successors, (390), 379 states have call predecessors, (390), 390 states have call successors, (390) [2024-11-28 03:38:16,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1261 transitions. [2024-11-28 03:38:16,687 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1261 transitions. Word has length 128 [2024-11-28 03:38:16,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:38:16,688 INFO L471 AbstractCegarLoop]: Abstraction has 817 states and 1261 transitions. [2024-11-28 03:38:16,688 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 35 states have internal predecessors, (61), 15 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (39), 11 states have call predecessors, (39), 13 states have call successors, (39) [2024-11-28 03:38:16,688 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1261 transitions. [2024-11-28 03:38:16,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-11-28 03:38:16,691 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:38:16,691 INFO L218 NwaCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:38:16,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-28 03:38:16,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-28 03:38:16,892 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:38:16,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:38:16,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1511244036, now seen corresponding path program 4 times [2024-11-28 03:38:16,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:38:16,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581902719] [2024-11-28 03:38:16,894 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:38:16,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:38:16,924 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:38:16,925 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:38:17,707 INFO L134 CoverageAnalysis]: Checked inductivity of 655 backedges. 47 proven. 49 refuted. 0 times theorem prover too weak. 559 trivial. 0 not checked. [2024-11-28 03:38:17,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:38:17,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581902719] [2024-11-28 03:38:17,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581902719] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:38:17,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028643513] [2024-11-28 03:38:17,708 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:38:17,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:38:17,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:38:17,711 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:38:17,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-28 03:38:17,815 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:38:17,816 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:38:17,818 INFO L256 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 03:38:17,822 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:38:18,477 INFO L134 CoverageAnalysis]: Checked inductivity of 655 backedges. 108 proven. 50 refuted. 0 times theorem prover too weak. 497 trivial. 0 not checked. [2024-11-28 03:38:18,477 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:38:19,581 INFO L134 CoverageAnalysis]: Checked inductivity of 655 backedges. 48 proven. 48 refuted. 0 times theorem prover too weak. 559 trivial. 0 not checked. [2024-11-28 03:38:19,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028643513] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:38:19,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:38:19,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 37 [2024-11-28 03:38:19,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255497918] [2024-11-28 03:38:19,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:38:19,583 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-28 03:38:19,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:38:19,584 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-28 03:38:19,585 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2024-11-28 03:38:19,585 INFO L87 Difference]: Start difference. First operand 817 states and 1261 transitions. Second operand has 37 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 17 states have call successors, (61), 2 states have call predecessors, (61), 3 states have return successors, (62), 16 states have call predecessors, (62), 17 states have call successors, (62) [2024-11-28 03:38:28,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:38:28,092 INFO L93 Difference]: Finished difference Result 1426 states and 2272 transitions. [2024-11-28 03:38:28,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-11-28 03:38:28,093 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 17 states have call successors, (61), 2 states have call predecessors, (61), 3 states have return successors, (62), 16 states have call predecessors, (62), 17 states have call successors, (62) Word has length 129 [2024-11-28 03:38:28,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:38:28,101 INFO L225 Difference]: With dead ends: 1426 [2024-11-28 03:38:28,101 INFO L226 Difference]: Without dead ends: 1053 [2024-11-28 03:38:28,105 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 239 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2158 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1731, Invalid=7971, Unknown=0, NotChecked=0, Total=9702 [2024-11-28 03:38:28,105 INFO L435 NwaCegarLoop]: 90 mSDtfsCounter, 185 mSDsluCounter, 1046 mSDsCounter, 0 mSdLazyCounter, 1440 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 1712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 1440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-28 03:38:28,106 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 1136 Invalid, 1712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 1440 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-28 03:38:28,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2024-11-28 03:38:29,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 848. [2024-11-28 03:38:29,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 392 states have (on average 1.2576530612244898) internal successors, (493), 406 states have internal predecessors, (493), 410 states have call successors, (410), 45 states have call predecessors, (410), 45 states have return successors, (408), 396 states have call predecessors, (408), 408 states have call successors, (408) [2024-11-28 03:38:29,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 1311 transitions. [2024-11-28 03:38:29,851 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 1311 transitions. Word has length 129 [2024-11-28 03:38:29,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:38:29,851 INFO L471 AbstractCegarLoop]: Abstraction has 848 states and 1311 transitions. [2024-11-28 03:38:29,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 17 states have call successors, (61), 2 states have call predecessors, (61), 3 states have return successors, (62), 16 states have call predecessors, (62), 17 states have call successors, (62) [2024-11-28 03:38:29,852 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 1311 transitions. [2024-11-28 03:38:29,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-11-28 03:38:29,854 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:38:29,855 INFO L218 NwaCegarLoop]: trace histogram [19, 18, 18, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:38:29,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-28 03:38:30,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-28 03:38:30,056 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:38:30,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:38:30,056 INFO L85 PathProgramCache]: Analyzing trace with hash -437376405, now seen corresponding path program 5 times [2024-11-28 03:38:30,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:38:30,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176173304] [2024-11-28 03:38:30,056 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:38:30,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:38:30,092 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-11-28 03:38:30,092 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:38:30,604 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 48 proven. 46 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2024-11-28 03:38:30,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:38:30,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176173304] [2024-11-28 03:38:30,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176173304] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:38:30,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227356458] [2024-11-28 03:38:30,605 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:38:30,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:38:30,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:38:30,607 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:38:30,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-28 03:38:30,717 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-11-28 03:38:30,717 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:38:30,719 INFO L256 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 03:38:30,721 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:38:31,387 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 191 proven. 28 refuted. 0 times theorem prover too weak. 503 trivial. 0 not checked. [2024-11-28 03:38:31,387 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:38:31,993 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 48 proven. 47 refuted. 0 times theorem prover too weak. 627 trivial. 0 not checked. [2024-11-28 03:38:31,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227356458] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:38:31,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:38:31,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2024-11-28 03:38:31,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456718594] [2024-11-28 03:38:31,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:38:31,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-28 03:38:31,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:38:31,995 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-28 03:38:31,996 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2024-11-28 03:38:31,996 INFO L87 Difference]: Start difference. First operand 848 states and 1311 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 16 states have call successors, (60), 2 states have call predecessors, (60), 3 states have return successors, (60), 15 states have call predecessors, (60), 16 states have call successors, (60) [2024-11-28 03:38:36,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:38:36,092 INFO L93 Difference]: Finished difference Result 1134 states and 1759 transitions. [2024-11-28 03:38:36,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-28 03:38:36,092 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 16 states have call successors, (60), 2 states have call predecessors, (60), 3 states have return successors, (60), 15 states have call predecessors, (60), 16 states have call successors, (60) Word has length 131 [2024-11-28 03:38:36,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:38:36,097 INFO L225 Difference]: With dead ends: 1134 [2024-11-28 03:38:36,097 INFO L226 Difference]: Without dead ends: 885 [2024-11-28 03:38:36,098 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 242 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=665, Invalid=3367, Unknown=0, NotChecked=0, Total=4032 [2024-11-28 03:38:36,099 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 124 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 03:38:36,099 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 655 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 03:38:36,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2024-11-28 03:38:37,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 857. [2024-11-28 03:38:37,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 398 states have (on average 1.243718592964824) internal successors, (495), 414 states have internal predecessors, (495), 413 states have call successors, (413), 45 states have call predecessors, (413), 45 states have return successors, (411), 397 states have call predecessors, (411), 411 states have call successors, (411) [2024-11-28 03:38:37,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1319 transitions. [2024-11-28 03:38:37,868 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1319 transitions. Word has length 131 [2024-11-28 03:38:37,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:38:37,869 INFO L471 AbstractCegarLoop]: Abstraction has 857 states and 1319 transitions. [2024-11-28 03:38:37,869 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 16 states have call successors, (60), 2 states have call predecessors, (60), 3 states have return successors, (60), 15 states have call predecessors, (60), 16 states have call successors, (60) [2024-11-28 03:38:37,869 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1319 transitions. [2024-11-28 03:38:37,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-11-28 03:38:37,871 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:38:37,871 INFO L218 NwaCegarLoop]: trace histogram [19, 18, 18, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:38:37,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-28 03:38:38,072 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-28 03:38:38,072 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:38:38,072 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:38:38,073 INFO L85 PathProgramCache]: Analyzing trace with hash -676872489, now seen corresponding path program 6 times [2024-11-28 03:38:38,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:38:38,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046093312] [2024-11-28 03:38:38,073 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:38:38,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:38:38,104 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-28 03:38:38,104 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:38:39,009 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 48 proven. 47 refuted. 0 times theorem prover too weak. 627 trivial. 0 not checked. [2024-11-28 03:38:39,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:38:39,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046093312] [2024-11-28 03:38:39,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046093312] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:38:39,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620083350] [2024-11-28 03:38:39,013 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:38:39,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:38:39,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:38:39,024 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:38:39,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-28 03:38:39,123 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 03:38:39,123 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:38:39,125 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-28 03:38:39,129 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:38:39,693 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 93 proven. 37 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2024-11-28 03:38:39,693 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:38:46,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620083350] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:38:46,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:38:46,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 24 [2024-11-28 03:38:46,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733273271] [2024-11-28 03:38:46,821 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:38:46,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 03:38:46,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:38:46,823 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 03:38:46,823 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=739, Unknown=1, NotChecked=0, Total=812 [2024-11-28 03:38:46,823 INFO L87 Difference]: Start difference. First operand 857 states and 1319 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 10 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) [2024-11-28 03:38:51,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:38:51,372 INFO L93 Difference]: Finished difference Result 902 states and 1360 transitions. [2024-11-28 03:38:51,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-28 03:38:51,372 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 10 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) Word has length 131 [2024-11-28 03:38:51,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:38:51,376 INFO L225 Difference]: With dead ends: 902 [2024-11-28 03:38:51,376 INFO L226 Difference]: Without dead ends: 874 [2024-11-28 03:38:51,377 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 167 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=365, Invalid=2714, Unknown=1, NotChecked=0, Total=3080 [2024-11-28 03:38:51,378 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 96 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 1148 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 1241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:38:51,378 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 588 Invalid, 1241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1148 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-28 03:38:51,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2024-11-28 03:38:53,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 850. [2024-11-28 03:38:53,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 399 states have (on average 1.2305764411027569) internal successors, (491), 411 states have internal predecessors, (491), 402 states have call successors, (402), 48 states have call predecessors, (402), 48 states have return successors, (401), 390 states have call predecessors, (401), 401 states have call successors, (401) [2024-11-28 03:38:53,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 1294 transitions. [2024-11-28 03:38:53,210 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 1294 transitions. Word has length 131 [2024-11-28 03:38:53,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:38:53,211 INFO L471 AbstractCegarLoop]: Abstraction has 850 states and 1294 transitions. [2024-11-28 03:38:53,211 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 10 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) [2024-11-28 03:38:53,211 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 1294 transitions. [2024-11-28 03:38:53,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-11-28 03:38:53,213 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:38:53,213 INFO L218 NwaCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:38:53,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-11-28 03:38:53,414 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-28 03:38:53,414 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:38:53,414 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:38:53,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1414170201, now seen corresponding path program 7 times [2024-11-28 03:38:53,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:38:53,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825585764] [2024-11-28 03:38:53,415 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:38:53,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:38:53,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:38:54,085 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 48 proven. 54 refuted. 0 times theorem prover too weak. 560 trivial. 0 not checked. [2024-11-28 03:38:54,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:38:54,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825585764] [2024-11-28 03:38:54,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825585764] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:38:54,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970743520] [2024-11-28 03:38:54,086 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:38:54,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:38:54,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:38:54,091 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:38:54,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-28 03:38:54,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:38:54,199 INFO L256 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-28 03:38:54,202 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:38:54,841 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 111 proven. 53 refuted. 0 times theorem prover too weak. 498 trivial. 0 not checked. [2024-11-28 03:38:54,841 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:38:55,849 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 59 proven. 44 refuted. 0 times theorem prover too weak. 559 trivial. 0 not checked. [2024-11-28 03:38:55,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970743520] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:38:55,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:38:55,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 18] total 34 [2024-11-28 03:38:55,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663949111] [2024-11-28 03:38:55,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:38:55,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-28 03:38:55,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:38:55,851 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-28 03:38:55,852 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 03:38:55,852 INFO L87 Difference]: Start difference. First operand 850 states and 1294 transitions. Second operand has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 34 states have internal predecessors, (62), 16 states have call successors, (57), 2 states have call predecessors, (57), 3 states have return successors, (58), 15 states have call predecessors, (58), 16 states have call successors, (58) [2024-11-28 03:39:01,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:39:01,452 INFO L93 Difference]: Finished difference Result 1084 states and 1644 transitions. [2024-11-28 03:39:01,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-28 03:39:01,452 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 34 states have internal predecessors, (62), 16 states have call successors, (57), 2 states have call predecessors, (57), 3 states have return successors, (58), 15 states have call predecessors, (58), 16 states have call successors, (58) Word has length 131 [2024-11-28 03:39:01,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:39:01,456 INFO L225 Difference]: With dead ends: 1084 [2024-11-28 03:39:01,456 INFO L226 Difference]: Without dead ends: 873 [2024-11-28 03:39:01,458 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 245 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1437 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1045, Invalid=5275, Unknown=0, NotChecked=0, Total=6320 [2024-11-28 03:39:01,458 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 135 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:39:01,459 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 600 Invalid, 998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 841 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-28 03:39:01,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2024-11-28 03:39:03,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 790. [2024-11-28 03:39:03,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 371 states have (on average 1.2318059299191375) internal successors, (457), 380 states have internal predecessors, (457), 372 states have call successors, (372), 46 states have call predecessors, (372), 46 states have return successors, (371), 363 states have call predecessors, (371), 371 states have call successors, (371) [2024-11-28 03:39:03,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 1200 transitions. [2024-11-28 03:39:03,122 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 1200 transitions. Word has length 131 [2024-11-28 03:39:03,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:39:03,122 INFO L471 AbstractCegarLoop]: Abstraction has 790 states and 1200 transitions. [2024-11-28 03:39:03,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 34 states have internal predecessors, (62), 16 states have call successors, (57), 2 states have call predecessors, (57), 3 states have return successors, (58), 15 states have call predecessors, (58), 16 states have call successors, (58) [2024-11-28 03:39:03,123 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 1200 transitions. [2024-11-28 03:39:03,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-11-28 03:39:03,124 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:39:03,124 INFO L218 NwaCegarLoop]: trace histogram [19, 18, 18, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:39:03,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-28 03:39:03,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:39:03,325 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:39:03,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:39:03,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1732774533, now seen corresponding path program 8 times [2024-11-28 03:39:03,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:39:03,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133147867] [2024-11-28 03:39:03,326 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:39:03,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:39:03,346 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:39:03,346 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:39:04,066 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 51 proven. 51 refuted. 0 times theorem prover too weak. 627 trivial. 0 not checked. [2024-11-28 03:39:04,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:39:04,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133147867] [2024-11-28 03:39:04,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133147867] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:39:04,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796242826] [2024-11-28 03:39:04,067 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:39:04,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:39:04,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:39:04,071 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:39:04,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-28 03:39:04,180 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:39:04,180 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:39:04,183 INFO L256 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-28 03:39:04,186 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:39:05,201 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 194 proven. 32 refuted. 0 times theorem prover too weak. 503 trivial. 0 not checked. [2024-11-28 03:39:05,202 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:39:06,101 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 51 proven. 51 refuted. 0 times theorem prover too weak. 627 trivial. 0 not checked. [2024-11-28 03:39:06,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796242826] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:39:06,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:39:06,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 36 [2024-11-28 03:39:06,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044151506] [2024-11-28 03:39:06,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:39:06,103 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-28 03:39:06,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:39:06,103 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-28 03:39:06,104 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1146, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 03:39:06,104 INFO L87 Difference]: Start difference. First operand 790 states and 1200 transitions. Second operand has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 34 states have internal predecessors, (62), 14 states have call successors, (51), 2 states have call predecessors, (51), 3 states have return successors, (51), 14 states have call predecessors, (51), 14 states have call successors, (51) [2024-11-28 03:39:10,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:39:10,204 INFO L93 Difference]: Finished difference Result 971 states and 1456 transitions. [2024-11-28 03:39:10,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 03:39:10,205 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 34 states have internal predecessors, (62), 14 states have call successors, (51), 2 states have call predecessors, (51), 3 states have return successors, (51), 14 states have call predecessors, (51), 14 states have call successors, (51) Word has length 134 [2024-11-28 03:39:10,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:39:10,208 INFO L225 Difference]: With dead ends: 971 [2024-11-28 03:39:10,208 INFO L226 Difference]: Without dead ends: 751 [2024-11-28 03:39:10,210 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 241 SyntacticMatches, 8 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=493, Invalid=2929, Unknown=0, NotChecked=0, Total=3422 [2024-11-28 03:39:10,210 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 187 mSDsluCounter, 906 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 963 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:39:10,210 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 963 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-28 03:39:10,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2024-11-28 03:39:11,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 624. [2024-11-28 03:39:11,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 297 states have (on average 1.2222222222222223) internal successors, (363), 305 states have internal predecessors, (363), 287 states have call successors, (287), 39 states have call predecessors, (287), 39 states have return successors, (286), 279 states have call predecessors, (286), 286 states have call successors, (286) [2024-11-28 03:39:11,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 936 transitions. [2024-11-28 03:39:11,589 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 936 transitions. Word has length 134 [2024-11-28 03:39:11,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:39:11,589 INFO L471 AbstractCegarLoop]: Abstraction has 624 states and 936 transitions. [2024-11-28 03:39:11,589 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 34 states have internal predecessors, (62), 14 states have call successors, (51), 2 states have call predecessors, (51), 3 states have return successors, (51), 14 states have call predecessors, (51), 14 states have call successors, (51) [2024-11-28 03:39:11,589 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 936 transitions. [2024-11-28 03:39:11,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2024-11-28 03:39:11,590 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:39:11,591 INFO L218 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:39:11,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-11-28 03:39:11,791 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-28 03:39:11,791 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:39:11,791 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:39:11,792 INFO L85 PathProgramCache]: Analyzing trace with hash -475229774, now seen corresponding path program 11 times [2024-11-28 03:39:11,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:39:11,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543282180] [2024-11-28 03:39:11,792 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:39:11,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:39:11,811 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-11-28 03:39:11,811 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:39:12,208 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 70 proven. 40 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2024-11-28 03:39:12,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:39:12,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543282180] [2024-11-28 03:39:12,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543282180] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:39:12,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261795692] [2024-11-28 03:39:12,209 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:39:12,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:39:12,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:39:12,212 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:39:12,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-28 03:39:12,322 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-11-28 03:39:12,323 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:39:12,325 INFO L256 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-28 03:39:12,327 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:39:12,744 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2024-11-28 03:39:12,745 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:39:13,332 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 50 proven. 60 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2024-11-28 03:39:13,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261795692] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:39:13,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:39:13,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 28 [2024-11-28 03:39:13,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289927236] [2024-11-28 03:39:13,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:39:13,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 03:39:13,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:39:13,334 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 03:39:13,334 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2024-11-28 03:39:13,334 INFO L87 Difference]: Start difference. First operand 624 states and 936 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 26 states have internal predecessors, (51), 18 states have call successors, (67), 2 states have call predecessors, (67), 2 states have return successors, (67), 18 states have call predecessors, (67), 18 states have call successors, (67) [2024-11-28 03:39:16,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:39:16,198 INFO L93 Difference]: Finished difference Result 713 states and 1030 transitions. [2024-11-28 03:39:16,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 03:39:16,199 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 26 states have internal predecessors, (51), 18 states have call successors, (67), 2 states have call predecessors, (67), 2 states have return successors, (67), 18 states have call predecessors, (67), 18 states have call successors, (67) Word has length 144 [2024-11-28 03:39:16,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:39:16,203 INFO L225 Difference]: With dead ends: 713 [2024-11-28 03:39:16,204 INFO L226 Difference]: Without dead ends: 470 [2024-11-28 03:39:16,206 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 270 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=407, Invalid=1945, Unknown=0, NotChecked=0, Total=2352 [2024-11-28 03:39:16,206 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 59 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 03:39:16,207 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 883 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 03:39:16,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2024-11-28 03:39:17,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 453. [2024-11-28 03:39:17,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 239 states have (on average 1.1464435146443515) internal successors, (274), 247 states have internal predecessors, (274), 174 states have call successors, (174), 39 states have call predecessors, (174), 39 states have return successors, (173), 166 states have call predecessors, (173), 173 states have call successors, (173) [2024-11-28 03:39:17,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 621 transitions. [2024-11-28 03:39:17,044 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 621 transitions. Word has length 144 [2024-11-28 03:39:17,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:39:17,044 INFO L471 AbstractCegarLoop]: Abstraction has 453 states and 621 transitions. [2024-11-28 03:39:17,045 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 26 states have internal predecessors, (51), 18 states have call successors, (67), 2 states have call predecessors, (67), 2 states have return successors, (67), 18 states have call predecessors, (67), 18 states have call successors, (67) [2024-11-28 03:39:17,045 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 621 transitions. [2024-11-28 03:39:17,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2024-11-28 03:39:17,047 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:39:17,047 INFO L218 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:39:17,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-28 03:39:17,250 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-28 03:39:17,251 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:39:17,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:39:17,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1964858318, now seen corresponding path program 12 times [2024-11-28 03:39:17,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:39:17,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325729183] [2024-11-28 03:39:17,252 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:39:17,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:39:17,306 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2024-11-28 03:39:17,307 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:39:18,042 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 40 proven. 70 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2024-11-28 03:39:18,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:39:18,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325729183] [2024-11-28 03:39:18,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325729183] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:39:18,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545862505] [2024-11-28 03:39:18,042 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:39:18,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:39:18,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:39:18,045 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:39:18,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-28 03:40:25,303 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-11-28 03:40:25,303 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:40:25,305 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-28 03:40:25,308 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:40:31,802 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 291 proven. 30 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2024-11-28 03:40:31,802 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:40:35,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545862505] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:40:35,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:40:35,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 24] total 37 [2024-11-28 03:40:35,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546986876] [2024-11-28 03:40:35,201 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:40:35,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-28 03:40:35,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:40:35,202 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-28 03:40:35,203 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1883, Unknown=0, NotChecked=0, Total=2070 [2024-11-28 03:40:35,203 INFO L87 Difference]: Start difference. First operand 453 states and 621 transitions. Second operand has 37 states, 32 states have (on average 1.71875) internal successors, (55), 30 states have internal predecessors, (55), 15 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (41), 15 states have call predecessors, (41), 13 states have call successors, (41) [2024-11-28 03:41:05,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 03:41:10,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:41:10,513 INFO L93 Difference]: Finished difference Result 686 states and 875 transitions. [2024-11-28 03:41:10,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-28 03:41:10,517 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 32 states have (on average 1.71875) internal successors, (55), 30 states have internal predecessors, (55), 15 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (41), 15 states have call predecessors, (41), 13 states have call successors, (41) Word has length 144 [2024-11-28 03:41:10,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:41:10,520 INFO L225 Difference]: With dead ends: 686 [2024-11-28 03:41:10,520 INFO L226 Difference]: Without dead ends: 386 [2024-11-28 03:41:10,523 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1589 ImplicationChecksByTransitivity, 31.4s TimeCoverageRelationStatistics Valid=1280, Invalid=7092, Unknown=0, NotChecked=0, Total=8372 [2024-11-28 03:41:10,524 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 117 mSDsluCounter, 1360 mSDsCounter, 0 mSdLazyCounter, 1895 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 1412 SdHoareTripleChecker+Invalid, 2116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 1895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:41:10,524 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 1412 Invalid, 2116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 1895 Invalid, 0 Unknown, 0 Unchecked, 12.3s Time] [2024-11-28 03:41:10,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2024-11-28 03:41:11,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 377. [2024-11-28 03:41:11,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 219 states have (on average 1.0593607305936072) internal successors, (232), 225 states have internal predecessors, (232), 111 states have call successors, (111), 46 states have call predecessors, (111), 46 states have return successors, (110), 105 states have call predecessors, (110), 110 states have call successors, (110) [2024-11-28 03:41:11,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 453 transitions. [2024-11-28 03:41:11,036 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 453 transitions. Word has length 144 [2024-11-28 03:41:11,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:41:11,036 INFO L471 AbstractCegarLoop]: Abstraction has 377 states and 453 transitions. [2024-11-28 03:41:11,036 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 32 states have (on average 1.71875) internal successors, (55), 30 states have internal predecessors, (55), 15 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (41), 15 states have call predecessors, (41), 13 states have call successors, (41) [2024-11-28 03:41:11,036 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 453 transitions. [2024-11-28 03:41:11,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2024-11-28 03:41:11,037 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:41:11,037 INFO L218 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:41:11,043 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-28 03:41:11,237 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-28 03:41:11,238 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:41:11,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:41:11,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1021624744, now seen corresponding path program 13 times [2024-11-28 03:41:11,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:41:11,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296818894] [2024-11-28 03:41:11,238 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:41:11,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:41:11,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:41:11,783 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 44 proven. 75 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2024-11-28 03:41:11,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:41:11,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296818894] [2024-11-28 03:41:11,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296818894] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:41:11,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974082292] [2024-11-28 03:41:11,783 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:41:11,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:41:11,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:41:11,785 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:41:11,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-28 03:41:11,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:41:11,865 INFO L256 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-28 03:41:11,868 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:41:12,306 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 49 proven. 70 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2024-11-28 03:41:12,306 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:41:13,541 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 48 proven. 71 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2024-11-28 03:41:13,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974082292] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:41:13,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:41:13,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 40 [2024-11-28 03:41:13,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454248478] [2024-11-28 03:41:13,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:41:13,543 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-28 03:41:13,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:41:13,543 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-28 03:41:13,544 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1401, Unknown=0, NotChecked=0, Total=1560 [2024-11-28 03:41:13,544 INFO L87 Difference]: Start difference. First operand 377 states and 453 transitions. Second operand has 40 states, 40 states have (on average 1.7) internal successors, (68), 37 states have internal predecessors, (68), 20 states have call successors, (69), 2 states have call predecessors, (69), 2 states have return successors, (70), 19 states have call predecessors, (70), 19 states have call successors, (70) [2024-11-28 03:41:17,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:41:17,897 INFO L93 Difference]: Finished difference Result 416 states and 504 transitions. [2024-11-28 03:41:17,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-28 03:41:17,897 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.7) internal successors, (68), 37 states have internal predecessors, (68), 20 states have call successors, (69), 2 states have call predecessors, (69), 2 states have return successors, (70), 19 states have call predecessors, (70), 19 states have call successors, (70) Word has length 147 [2024-11-28 03:41:17,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:41:17,899 INFO L225 Difference]: With dead ends: 416 [2024-11-28 03:41:17,900 INFO L226 Difference]: Without dead ends: 374 [2024-11-28 03:41:17,901 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1238, Invalid=4924, Unknown=0, NotChecked=0, Total=6162 [2024-11-28 03:41:17,901 INFO L435 NwaCegarLoop]: 80 mSDtfsCounter, 103 mSDsluCounter, 1072 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 1152 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:41:17,901 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 1152 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1190 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-28 03:41:17,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2024-11-28 03:41:18,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 369. [2024-11-28 03:41:18,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 218 states have (on average 1.0412844036697249) internal successors, (227), 223 states have internal predecessors, (227), 104 states have call successors, (104), 46 states have call predecessors, (104), 46 states have return successors, (102), 99 states have call predecessors, (102), 102 states have call successors, (102) [2024-11-28 03:41:18,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 433 transitions. [2024-11-28 03:41:18,743 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 433 transitions. Word has length 147 [2024-11-28 03:41:18,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:41:18,743 INFO L471 AbstractCegarLoop]: Abstraction has 369 states and 433 transitions. [2024-11-28 03:41:18,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.7) internal successors, (68), 37 states have internal predecessors, (68), 20 states have call successors, (69), 2 states have call predecessors, (69), 2 states have return successors, (70), 19 states have call predecessors, (70), 19 states have call successors, (70) [2024-11-28 03:41:18,744 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 433 transitions. [2024-11-28 03:41:18,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2024-11-28 03:41:18,745 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:41:18,745 INFO L218 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:41:18,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-28 03:41:18,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:41:18,946 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:41:18,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:41:18,946 INFO L85 PathProgramCache]: Analyzing trace with hash -787734077, now seen corresponding path program 14 times [2024-11-28 03:41:18,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:41:18,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363278538] [2024-11-28 03:41:18,947 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:41:18,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:41:18,966 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:41:18,966 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:41:19,725 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 72 proven. 54 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2024-11-28 03:41:19,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:41:19,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363278538] [2024-11-28 03:41:19,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363278538] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:41:19,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92017931] [2024-11-28 03:41:19,726 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:41:19,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:41:19,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:41:19,729 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:41:19,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-28 03:41:19,832 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:41:19,832 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:41:19,837 INFO L256 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 03:41:19,840 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:41:20,647 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 328 proven. 46 refuted. 0 times theorem prover too weak. 527 trivial. 0 not checked. [2024-11-28 03:41:20,647 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:41:21,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92017931] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:41:21,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:41:21,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2024-11-28 03:41:21,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134929331] [2024-11-28 03:41:21,717 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:41:21,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-28 03:41:21,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:41:21,718 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-28 03:41:21,718 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1915, Unknown=0, NotChecked=0, Total=2070 [2024-11-28 03:41:21,718 INFO L87 Difference]: Start difference. First operand 369 states and 433 transitions. Second operand has 32 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 12 states have call successors, (48), 2 states have call predecessors, (48), 3 states have return successors, (48), 11 states have call predecessors, (48), 12 states have call successors, (48) [2024-11-28 03:41:23,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:41:23,973 INFO L93 Difference]: Finished difference Result 453 states and 535 transitions. [2024-11-28 03:41:23,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 03:41:23,974 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 12 states have call successors, (48), 2 states have call predecessors, (48), 3 states have return successors, (48), 11 states have call predecessors, (48), 12 states have call successors, (48) Word has length 149 [2024-11-28 03:41:23,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:41:23,977 INFO L225 Difference]: With dead ends: 453 [2024-11-28 03:41:23,977 INFO L226 Difference]: Without dead ends: 369 [2024-11-28 03:41:23,978 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=423, Invalid=3117, Unknown=0, NotChecked=0, Total=3540 [2024-11-28 03:41:23,978 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 103 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 03:41:23,978 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 725 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 03:41:23,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2024-11-28 03:41:24,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 369. [2024-11-28 03:41:24,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 218 states have (on average 1.036697247706422) internal successors, (226), 223 states have internal predecessors, (226), 104 states have call successors, (104), 46 states have call predecessors, (104), 46 states have return successors, (102), 99 states have call predecessors, (102), 102 states have call successors, (102) [2024-11-28 03:41:24,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 432 transitions. [2024-11-28 03:41:24,436 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 432 transitions. Word has length 149 [2024-11-28 03:41:24,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:41:24,437 INFO L471 AbstractCegarLoop]: Abstraction has 369 states and 432 transitions. [2024-11-28 03:41:24,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 12 states have call successors, (48), 2 states have call predecessors, (48), 3 states have return successors, (48), 11 states have call predecessors, (48), 12 states have call successors, (48) [2024-11-28 03:41:24,437 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 432 transitions. [2024-11-28 03:41:24,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2024-11-28 03:41:24,438 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:41:24,438 INFO L218 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:41:24,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-11-28 03:41:24,642 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:41:24,643 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:41:24,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:41:24,643 INFO L85 PathProgramCache]: Analyzing trace with hash 117174109, now seen corresponding path program 15 times [2024-11-28 03:41:24,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:41:24,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666299208] [2024-11-28 03:41:24,644 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:41:24,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:41:24,676 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-28 03:41:24,677 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:41:25,347 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 57 proven. 80 refuted. 0 times theorem prover too weak. 777 trivial. 0 not checked. [2024-11-28 03:41:25,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:41:25,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666299208] [2024-11-28 03:41:25,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666299208] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:41:25,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808675786] [2024-11-28 03:41:25,347 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:41:25,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:41:25,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:41:25,350 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:41:25,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-28 03:41:25,759 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-28 03:41:25,759 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:41:25,762 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 112 conjuncts are in the unsatisfiable core [2024-11-28 03:41:25,764 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:41:33,420 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 145 proven. 96 refuted. 0 times theorem prover too weak. 673 trivial. 0 not checked. [2024-11-28 03:41:33,421 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:41:36,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808675786] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:41:36,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:41:36,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 27] total 42 [2024-11-28 03:41:36,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846573166] [2024-11-28 03:41:36,259 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:41:36,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-28 03:41:36,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:41:36,260 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-28 03:41:36,260 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=2264, Unknown=0, NotChecked=0, Total=2550 [2024-11-28 03:41:36,261 INFO L87 Difference]: Start difference. First operand 369 states and 432 transitions. Second operand has 42 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 15 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) [2024-11-28 03:41:43,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:41:43,229 INFO L93 Difference]: Finished difference Result 448 states and 517 transitions. [2024-11-28 03:41:43,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-28 03:41:43,230 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 15 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) Word has length 152 [2024-11-28 03:41:43,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:41:43,231 INFO L225 Difference]: With dead ends: 448 [2024-11-28 03:41:43,231 INFO L226 Difference]: Without dead ends: 331 [2024-11-28 03:41:43,232 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 149 SyntacticMatches, 3 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2572 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=1183, Invalid=7937, Unknown=0, NotChecked=0, Total=9120 [2024-11-28 03:41:43,232 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 159 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 1531 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 1723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:41:43,233 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 564 Invalid, 1723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 1531 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-28 03:41:43,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2024-11-28 03:41:43,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 324. [2024-11-28 03:41:43,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 193 states have (on average 1.0310880829015545) internal successors, (199), 197 states have internal predecessors, (199), 88 states have call successors, (88), 42 states have call predecessors, (88), 42 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2024-11-28 03:41:43,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 373 transitions. [2024-11-28 03:41:43,783 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 373 transitions. Word has length 152 [2024-11-28 03:41:43,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:41:43,783 INFO L471 AbstractCegarLoop]: Abstraction has 324 states and 373 transitions. [2024-11-28 03:41:43,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 15 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) [2024-11-28 03:41:43,783 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 373 transitions. [2024-11-28 03:41:43,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2024-11-28 03:41:43,785 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:41:43,785 INFO L218 NwaCegarLoop]: trace histogram [23, 22, 22, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:41:43,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-28 03:41:43,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:41:43,986 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:41:43,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:41:43,987 INFO L85 PathProgramCache]: Analyzing trace with hash 456581322, now seen corresponding path program 9 times [2024-11-28 03:41:43,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:41:43,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926843058] [2024-11-28 03:41:43,987 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:41:43,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:41:44,010 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 03:41:44,010 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:41:44,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 62 proven. 56 refuted. 0 times theorem prover too weak. 954 trivial. 0 not checked. [2024-11-28 03:41:44,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:41:44,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926843058] [2024-11-28 03:41:44,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926843058] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:41:44,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183587222] [2024-11-28 03:41:44,584 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:41:44,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:41:44,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:41:44,588 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:41:44,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-28 03:41:44,669 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 03:41:44,669 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:41:44,670 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-28 03:41:44,673 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:41:45,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 154 proven. 17 refuted. 0 times theorem prover too weak. 901 trivial. 0 not checked. [2024-11-28 03:41:45,061 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:41:45,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 143 proven. 9 refuted. 0 times theorem prover too weak. 920 trivial. 0 not checked. [2024-11-28 03:41:45,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183587222] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:41:45,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:41:45,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 7] total 25 [2024-11-28 03:41:45,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828550046] [2024-11-28 03:41:45,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:41:45,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 03:41:45,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:41:45,490 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 03:41:45,490 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2024-11-28 03:41:45,490 INFO L87 Difference]: Start difference. First operand 324 states and 373 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 23 states have internal predecessors, (59), 8 states have call successors, (35), 4 states have call predecessors, (35), 3 states have return successors, (36), 10 states have call predecessors, (36), 8 states have call successors, (36) [2024-11-28 03:41:47,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:41:47,944 INFO L93 Difference]: Finished difference Result 438 states and 518 transitions. [2024-11-28 03:41:47,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-28 03:41:47,945 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 23 states have internal predecessors, (59), 8 states have call successors, (35), 4 states have call predecessors, (35), 3 states have return successors, (36), 10 states have call predecessors, (36), 8 states have call successors, (36) Word has length 155 [2024-11-28 03:41:47,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:41:47,947 INFO L225 Difference]: With dead ends: 438 [2024-11-28 03:41:47,947 INFO L226 Difference]: Without dead ends: 305 [2024-11-28 03:41:47,948 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=298, Invalid=1958, Unknown=0, NotChecked=0, Total=2256 [2024-11-28 03:41:47,949 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 68 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:41:47,949 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 645 Invalid, 1054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-28 03:41:47,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2024-11-28 03:41:48,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2024-11-28 03:41:48,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 187 states have (on average 1.0160427807486632) internal successors, (190), 189 states have internal predecessors, (190), 75 states have call successors, (75), 42 states have call predecessors, (75), 42 states have return successors, (74), 73 states have call predecessors, (74), 74 states have call successors, (74) [2024-11-28 03:41:48,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 339 transitions. [2024-11-28 03:41:48,468 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 339 transitions. Word has length 155 [2024-11-28 03:41:48,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:41:48,468 INFO L471 AbstractCegarLoop]: Abstraction has 305 states and 339 transitions. [2024-11-28 03:41:48,468 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 23 states have internal predecessors, (59), 8 states have call successors, (35), 4 states have call predecessors, (35), 3 states have return successors, (36), 10 states have call predecessors, (36), 8 states have call successors, (36) [2024-11-28 03:41:48,468 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 339 transitions. [2024-11-28 03:41:48,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2024-11-28 03:41:48,469 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:41:48,469 INFO L218 NwaCegarLoop]: trace histogram [26, 25, 25, 7, 7, 7, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:41:48,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-28 03:41:48,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-28 03:41:48,670 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:41:48,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:41:48,670 INFO L85 PathProgramCache]: Analyzing trace with hash -323950664, now seen corresponding path program 10 times [2024-11-28 03:41:48,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:41:48,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918801984] [2024-11-28 03:41:48,671 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:41:48,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:41:48,691 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:41:48,691 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:41:49,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 73 proven. 95 refuted. 0 times theorem prover too weak. 1236 trivial. 0 not checked. [2024-11-28 03:41:49,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:41:49,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918801984] [2024-11-28 03:41:49,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918801984] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:41:49,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147191494] [2024-11-28 03:41:49,182 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:41:49,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:41:49,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:41:49,184 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:41:49,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-28 03:41:49,288 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:41:49,288 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:41:49,291 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 03:41:49,293 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:41:49,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 169 proven. 93 refuted. 0 times theorem prover too weak. 1142 trivial. 0 not checked. [2024-11-28 03:41:49,768 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:41:50,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 73 proven. 96 refuted. 0 times theorem prover too weak. 1235 trivial. 0 not checked. [2024-11-28 03:41:50,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147191494] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:41:50,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:41:50,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 29 [2024-11-28 03:41:50,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180979619] [2024-11-28 03:41:50,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:41:50,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 03:41:50,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:41:50,537 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 03:41:50,537 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2024-11-28 03:41:50,537 INFO L87 Difference]: Start difference. First operand 305 states and 339 transitions. Second operand has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 15 states have call successors, (53), 2 states have call predecessors, (53), 3 states have return successors, (54), 14 states have call predecessors, (54), 15 states have call successors, (54) [2024-11-28 03:41:51,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:41:51,881 INFO L93 Difference]: Finished difference Result 320 states and 354 transitions. [2024-11-28 03:41:51,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 03:41:51,881 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 15 states have call successors, (53), 2 states have call predecessors, (53), 3 states have return successors, (54), 14 states have call predecessors, (54), 15 states have call successors, (54) Word has length 178 [2024-11-28 03:41:51,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:41:51,882 INFO L225 Difference]: With dead ends: 320 [2024-11-28 03:41:51,883 INFO L226 Difference]: Without dead ends: 0 [2024-11-28 03:41:51,884 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 342 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=509, Invalid=1941, Unknown=0, NotChecked=0, Total=2450 [2024-11-28 03:41:51,884 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 52 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 03:41:51,884 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 551 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 03:41:51,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-28 03:41:51,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-28 03:41:51,885 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 03:41:51,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-28 03:41:51,886 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 178 [2024-11-28 03:41:51,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:41:51,886 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-28 03:41:51,887 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 15 states have call successors, (53), 2 states have call predecessors, (53), 3 states have return successors, (54), 14 states have call predecessors, (54), 15 states have call successors, (54) [2024-11-28 03:41:51,887 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-28 03:41:51,887 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-28 03:41:51,890 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-28 03:41:51,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-11-28 03:41:52,091 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_767a6a96-c981-4c95-9405-09a3788ce71d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-28 03:41:52,094 INFO L422 BasicCegarLoop]: Path program histogram: [15, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:41:52,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-11-28 03:42:05,551 WARN L286 SmtUtils]: Spent 13.44s on a formula simplification. DAG size of input: 474 DAG size of output: 649 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-11-28 03:46:19,448 WARN L286 SmtUtils]: Spent 4.23m on a formula simplification. DAG size of input: 1017 DAG size of output: 2542 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or)