./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/phases_1-1.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_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/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_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-acceleration/phases_1-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/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_ec4d9cb2-18ea-4b99-a17b-0cb526001328/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 bc900b1bfcaecf91bc89637deaef4e1ddf2476faf43fa7e6f1e197c315ae3982 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 04:15:56,368 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:15:56,452 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 04:15:56,457 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:15:56,458 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:15:56,480 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:15:56,480 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:15:56,481 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:15:56,481 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:15:56,481 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:15:56,481 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:15:56,482 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:15:56,482 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:15:56,482 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:15:56,482 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:15:56,482 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:15:56,483 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 04:15:56,483 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 04:15:56,483 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 04:15:56,483 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 04:15:56,483 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:15:56,483 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 04:15:56,484 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:15:56,484 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 04:15:56,484 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 04:15:56,484 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 04:15:56,484 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:15:56,484 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:15:56,484 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:15:56,485 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:15:56,485 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:15:56,485 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:15:56,485 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:15:56,485 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:15:56,485 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:15:56,485 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:15:56,486 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:15:56,486 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:15:56,486 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:15:56,486 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:15:56,486 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 04:15:56,486 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 04:15:56,486 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 04:15:56,486 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 04:15:56,487 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:15:56,487 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:15:56,487 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:15:56,487 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:15:56,487 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_ec4d9cb2-18ea-4b99-a17b-0cb526001328/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 -> bc900b1bfcaecf91bc89637deaef4e1ddf2476faf43fa7e6f1e197c315ae3982 [2024-11-28 04:15:56,792 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:15:56,804 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:15:56,807 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:15:56,808 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:15:56,809 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:15:56,811 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/loop-acceleration/phases_1-1.c [2024-11-28 04:15:59,775 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/data/a985c4e58/b45effa6263f44deb4e1ca3add08c7c7/FLAGbc542731d [2024-11-28 04:16:00,068 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:16:00,069 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/sv-benchmarks/c/loop-acceleration/phases_1-1.c [2024-11-28 04:16:00,076 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/data/a985c4e58/b45effa6263f44deb4e1ca3add08c7c7/FLAGbc542731d [2024-11-28 04:16:00,100 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/data/a985c4e58/b45effa6263f44deb4e1ca3add08c7c7 [2024-11-28 04:16:00,104 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:16:00,106 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:16:00,108 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:16:00,109 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:16:00,114 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:16:00,115 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:16:00" (1/1) ... [2024-11-28 04:16:00,118 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61fbb90b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:16:00, skipping insertion in model container [2024-11-28 04:16:00,118 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:16:00" (1/1) ... [2024-11-28 04:16:00,133 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:16:00,303 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_ec4d9cb2-18ea-4b99-a17b-0cb526001328/sv-benchmarks/c/loop-acceleration/phases_1-1.c[322,335] [2024-11-28 04:16:00,321 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:16:00,333 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 04:16:00,346 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_ec4d9cb2-18ea-4b99-a17b-0cb526001328/sv-benchmarks/c/loop-acceleration/phases_1-1.c[322,335] [2024-11-28 04:16:00,349 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:16:00,368 INFO L204 MainTranslator]: Completed translation [2024-11-28 04:16:00,369 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:16:00 WrapperNode [2024-11-28 04:16:00,369 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:16:00,374 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 04:16:00,374 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 04:16:00,374 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 04:16:00,386 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:16:00" (1/1) ... [2024-11-28 04:16:00,394 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:16:00" (1/1) ... [2024-11-28 04:16:00,411 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 25 [2024-11-28 04:16:00,412 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 04:16:00,413 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 04:16:00,414 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 04:16:00,414 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 04:16:00,422 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:16:00" (1/1) ... [2024-11-28 04:16:00,423 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:16:00" (1/1) ... [2024-11-28 04:16:00,424 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:16:00" (1/1) ... [2024-11-28 04:16:00,435 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-28 04:16:00,435 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:16:00" (1/1) ... [2024-11-28 04:16:00,436 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:16:00" (1/1) ... [2024-11-28 04:16:00,442 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:16:00" (1/1) ... [2024-11-28 04:16:00,443 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:16:00" (1/1) ... [2024-11-28 04:16:00,448 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:16:00" (1/1) ... [2024-11-28 04:16:00,450 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:16:00" (1/1) ... [2024-11-28 04:16:00,450 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:16:00" (1/1) ... [2024-11-28 04:16:00,451 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 04:16:00,456 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 04:16:00,456 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 04:16:00,456 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 04:16:00,457 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:16:00" (1/1) ... [2024-11-28 04:16:00,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:16:00,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:16:00,495 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 04:16:00,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 04:16:00,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 04:16:00,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 04:16:00,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 04:16:00,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 04:16:00,594 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 04:16:00,596 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 04:16:00,713 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-28 04:16:00,713 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 04:16:00,728 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 04:16:00,729 INFO L312 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-28 04:16:00,729 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:16:00 BoogieIcfgContainer [2024-11-28 04:16:00,729 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 04:16:00,733 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 04:16:00,733 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 04:16:00,739 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 04:16:00,739 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:16:00" (1/3) ... [2024-11-28 04:16:00,740 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@177e5e51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:16:00, skipping insertion in model container [2024-11-28 04:16:00,741 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:16:00" (2/3) ... [2024-11-28 04:16:00,742 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@177e5e51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:16:00, skipping insertion in model container [2024-11-28 04:16:00,743 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:16:00" (3/3) ... [2024-11-28 04:16:00,744 INFO L128 eAbstractionObserver]: Analyzing ICFG phases_1-1.c [2024-11-28 04:16:00,762 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 04:16:00,767 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG phases_1-1.c that has 1 procedures, 12 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2024-11-28 04:16:00,836 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 04:16:00,853 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;@50c1355, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 04:16:00,854 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-28 04:16:00,857 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:16:00,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-28 04:16:00,865 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:16:00,866 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-28 04:16:00,867 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:16:00,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:16:00,875 INFO L85 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2024-11-28 04:16:00,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:16:00,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121649409] [2024-11-28 04:16:00,884 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:16:00,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:16:00,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:16:01,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:16:01,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:16:01,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121649409] [2024-11-28 04:16:01,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121649409] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:16:01,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:16:01,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:16:01,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636731799] [2024-11-28 04:16:01,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:16:01,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-28 04:16:01,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:16:01,041 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-28 04:16:01,042 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 04:16:01,044 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 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) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:16:01,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:16:01,056 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2024-11-28 04:16:01,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-28 04:16:01,058 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) Word has length 6 [2024-11-28 04:16:01,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:16:01,064 INFO L225 Difference]: With dead ends: 20 [2024-11-28 04:16:01,065 INFO L226 Difference]: Without dead ends: 8 [2024-11-28 04:16:01,068 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 04:16:01,073 INFO L435 NwaCegarLoop]: 13 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, 13 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:16:01,076 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:16:01,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2024-11-28 04:16:01,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2024-11-28 04:16:01,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:16:01,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2024-11-28 04:16:01,117 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2024-11-28 04:16:01,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:16:01,119 INFO L471 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2024-11-28 04:16:01,119 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:16:01,120 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2024-11-28 04:16:01,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-28 04:16:01,120 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:16:01,120 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-28 04:16:01,120 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 04:16:01,121 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:16:01,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:16:01,121 INFO L85 PathProgramCache]: Analyzing trace with hash 889669584, now seen corresponding path program 1 times [2024-11-28 04:16:01,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:16:01,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997768137] [2024-11-28 04:16:01,123 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:16:01,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:16:01,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:16:01,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:16:01,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:16:01,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997768137] [2024-11-28 04:16:01,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997768137] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:16:01,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:16:01,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 04:16:01,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466016160] [2024-11-28 04:16:01,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:16:01,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 04:16:01,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:16:01,264 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 04:16:01,266 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 04:16:01,266 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:16:01,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:16:01,288 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2024-11-28 04:16:01,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 04:16:01,289 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) Word has length 6 [2024-11-28 04:16:01,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:16:01,289 INFO L225 Difference]: With dead ends: 16 [2024-11-28 04:16:01,289 INFO L226 Difference]: Without dead ends: 10 [2024-11-28 04:16:01,290 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 04:16:01,291 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:16:01,291 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 10 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:16:01,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2024-11-28 04:16:01,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2024-11-28 04:16:01,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:16:01,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2024-11-28 04:16:01,295 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2024-11-28 04:16:01,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:16:01,295 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2024-11-28 04:16:01,295 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:16:01,295 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2024-11-28 04:16:01,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-28 04:16:01,298 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:16:01,298 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:16:01,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 04:16:01,299 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:16:01,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:16:01,301 INFO L85 PathProgramCache]: Analyzing trace with hash 209834262, now seen corresponding path program 1 times [2024-11-28 04:16:01,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:16:01,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402025457] [2024-11-28 04:16:01,301 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:16:01,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:16:01,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:16:01,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:16:01,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:16:01,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402025457] [2024-11-28 04:16:01,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402025457] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:16:01,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872595216] [2024-11-28 04:16:01,481 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:16:01,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:16:01,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:16:01,484 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:16:01,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 04:16:01,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:16:01,547 INFO L256 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 04:16:01,551 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:16:01,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:16:01,590 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:16:01,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:16:01,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872595216] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:16:01,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:16:01,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-28 04:16:01,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836886304] [2024-11-28 04:16:01,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:16:01,664 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 04:16:01,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:16:01,665 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 04:16:01,665 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:16:01,668 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:16:01,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:16:01,750 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2024-11-28 04:16:01,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:16:01,751 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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) Word has length 8 [2024-11-28 04:16:01,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:16:01,752 INFO L225 Difference]: With dead ends: 20 [2024-11-28 04:16:01,752 INFO L226 Difference]: Without dead ends: 14 [2024-11-28 04:16:01,752 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:16:01,753 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:16:01,753 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 21 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:16:01,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-11-28 04:16:01,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2024-11-28 04:16:01,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:16:01,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2024-11-28 04:16:01,757 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8 [2024-11-28 04:16:01,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:16:01,758 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2024-11-28 04:16:01,758 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:16:01,758 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2024-11-28 04:16:01,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-28 04:16:01,758 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:16:01,758 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:16:01,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 04:16:01,962 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:16:01,962 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:16:01,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:16:01,963 INFO L85 PathProgramCache]: Analyzing trace with hash 142853668, now seen corresponding path program 1 times [2024-11-28 04:16:01,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:16:01,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249632843] [2024-11-28 04:16:01,963 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:16:01,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:16:01,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:16:02,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:16:02,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:16:02,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249632843] [2024-11-28 04:16:02,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249632843] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:16:02,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765580286] [2024-11-28 04:16:02,145 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:16:02,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:16:02,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:16:02,149 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:16:02,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 04:16:02,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:16:02,193 INFO L256 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 04:16:02,195 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:16:02,279 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:16:02,279 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:16:02,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 04:16:02,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765580286] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:16:02,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:16:02,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 10 [2024-11-28 04:16:02,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353361808] [2024-11-28 04:16:02,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:16:02,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 04:16:02,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:16:02,383 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 04:16:02,383 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-11-28 04:16:02,383 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:16:02,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:16:02,504 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2024-11-28 04:16:02,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 04:16:02,505 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 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) Word has length 12 [2024-11-28 04:16:02,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:16:02,505 INFO L225 Difference]: With dead ends: 27 [2024-11-28 04:16:02,505 INFO L226 Difference]: Without dead ends: 18 [2024-11-28 04:16:02,506 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-11-28 04:16:02,507 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:16:02,507 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 25 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:16:02,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-28 04:16:02,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2024-11-28 04:16:02,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:16:02,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2024-11-28 04:16:02,517 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2024-11-28 04:16:02,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:16:02,517 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2024-11-28 04:16:02,517 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:16:02,517 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2024-11-28 04:16:02,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 04:16:02,518 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:16:02,518 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:16:02,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 04:16:02,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-28 04:16:02,718 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:16:02,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:16:02,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1993882902, now seen corresponding path program 2 times [2024-11-28 04:16:02,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:16:02,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182287352] [2024-11-28 04:16:02,719 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:16:02,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:16:02,737 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:16:02,737 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:16:02,900 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:16:02,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:16:02,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182287352] [2024-11-28 04:16:02,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182287352] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:16:02,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521378464] [2024-11-28 04:16:02,902 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:16:02,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:16:02,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:16:02,904 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:16:02,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 04:16:02,951 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:16:02,951 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:16:02,952 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 04:16:02,953 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:16:02,985 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:16:02,986 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:16:03,204 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:16:03,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521378464] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:16:03,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:16:03,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2024-11-28 04:16:03,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880115113] [2024-11-28 04:16:03,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:16:03,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 04:16:03,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:16:03,205 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 04:16:03,206 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2024-11-28 04:16:03,206 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:16:03,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:16:03,596 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2024-11-28 04:16:03,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 04:16:03,597 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 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) Word has length 14 [2024-11-28 04:16:03,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:16:03,597 INFO L225 Difference]: With dead ends: 38 [2024-11-28 04:16:03,597 INFO L226 Difference]: Without dead ends: 29 [2024-11-28 04:16:03,598 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2024-11-28 04:16:03,598 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:16:03,599 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 21 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:16:03,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-28 04:16:03,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-28 04:16:03,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:16:03,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2024-11-28 04:16:03,606 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 14 [2024-11-28 04:16:03,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:16:03,607 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2024-11-28 04:16:03,607 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:16:03,607 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2024-11-28 04:16:03,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-28 04:16:03,607 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:16:03,607 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:16:03,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 04:16:03,811 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:16:03,811 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:16:03,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:16:03,812 INFO L85 PathProgramCache]: Analyzing trace with hash -2111391730, now seen corresponding path program 3 times [2024-11-28 04:16:03,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:16:03,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027460985] [2024-11-28 04:16:03,812 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:16:03,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:16:03,829 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 04:16:03,829 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:16:03,920 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-28 04:16:03,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:16:03,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027460985] [2024-11-28 04:16:03,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027460985] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:16:03,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084448919] [2024-11-28 04:16:03,921 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:16:03,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:16:03,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:16:03,923 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:16:03,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 04:16:03,964 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 04:16:03,964 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:16:03,965 INFO L256 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 04:16:03,966 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:16:04,038 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-28 04:16:04,038 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:16:04,121 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-28 04:16:04,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084448919] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:16:04,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:16:04,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5] total 8 [2024-11-28 04:16:04,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485078805] [2024-11-28 04:16:04,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:16:04,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 04:16:04,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:16:04,122 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 04:16:04,122 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:16:04,122 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:16:04,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:16:04,219 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2024-11-28 04:16:04,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 04:16:04,220 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 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) Word has length 26 [2024-11-28 04:16:04,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:16:04,221 INFO L225 Difference]: With dead ends: 51 [2024-11-28 04:16:04,221 INFO L226 Difference]: Without dead ends: 42 [2024-11-28 04:16:04,222 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2024-11-28 04:16:04,222 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:16:04,223 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 14 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:16:04,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-28 04:16:04,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2024-11-28 04:16:04,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:16:04,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2024-11-28 04:16:04,245 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 26 [2024-11-28 04:16:04,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:16:04,245 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2024-11-28 04:16:04,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:16:04,246 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2024-11-28 04:16:04,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-28 04:16:04,246 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:16:04,246 INFO L218 NwaCegarLoop]: trace histogram [13, 9, 4, 1, 1, 1, 1, 1, 1] [2024-11-28 04:16:04,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 04:16:04,447 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-28 04:16:04,447 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:16:04,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:16:04,447 INFO L85 PathProgramCache]: Analyzing trace with hash -563682202, now seen corresponding path program 4 times [2024-11-28 04:16:04,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:16:04,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710516647] [2024-11-28 04:16:04,447 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:16:04,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:16:04,481 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:16:04,482 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:16:04,806 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 70 proven. 90 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:16:04,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:16:04,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710516647] [2024-11-28 04:16:04,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710516647] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:16:04,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185083628] [2024-11-28 04:16:04,806 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:16:04,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:16:04,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:16:04,808 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:16:04,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 04:16:04,863 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:16:04,863 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:16:04,870 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-28 04:16:04,871 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:16:04,997 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:16:04,997 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:16:05,920 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:16:05,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185083628] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:16:05,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:16:05,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 16] total 30 [2024-11-28 04:16:05,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345486871] [2024-11-28 04:16:05,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:16:05,921 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 04:16:05,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:16:05,922 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 04:16:05,922 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2024-11-28 04:16:05,923 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:16:17,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:16:17,843 INFO L93 Difference]: Finished difference Result 86 states and 110 transitions. [2024-11-28 04:16:17,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 04:16:17,844 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 states have internal predecessors, (64), 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) Word has length 32 [2024-11-28 04:16:17,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:16:17,844 INFO L225 Difference]: With dead ends: 86 [2024-11-28 04:16:17,845 INFO L226 Difference]: Without dead ends: 67 [2024-11-28 04:16:17,846 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=654, Invalid=1152, Unknown=0, NotChecked=0, Total=1806 [2024-11-28 04:16:17,846 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:16:17,847 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:16:17,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-28 04:16:17,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-11-28 04:16:17,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 66 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:16:17,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2024-11-28 04:16:17,862 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 32 [2024-11-28 04:16:17,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:16:17,862 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2024-11-28 04:16:17,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:16:17,863 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2024-11-28 04:16:17,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-28 04:16:17,866 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:16:17,866 INFO L218 NwaCegarLoop]: trace histogram [27, 23, 4, 1, 1, 1, 1, 1, 1] [2024-11-28 04:16:17,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 04:16:18,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:16:18,067 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:16:18,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:16:18,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1438495930, now seen corresponding path program 5 times [2024-11-28 04:16:18,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:16:18,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382957614] [2024-11-28 04:16:18,068 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:16:18,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:16:18,142 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2024-11-28 04:16:18,142 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:16:19,087 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 168 proven. 552 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:16:19,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:16:19,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382957614] [2024-11-28 04:16:19,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382957614] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:16:19,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773513739] [2024-11-28 04:16:19,087 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:16:19,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:16:19,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:16:19,091 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:16:19,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 04:16:19,346 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2024-11-28 04:16:19,346 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:16:19,347 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-28 04:16:19,349 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:16:19,503 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 125 proven. 600 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 04:16:19,503 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:16:21,425 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 125 proven. 600 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 04:16:21,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773513739] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:16:21,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:16:21,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 28] total 54 [2024-11-28 04:16:21,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506690154] [2024-11-28 04:16:21,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:16:21,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-28 04:16:21,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:16:21,428 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-28 04:16:21,429 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=806, Invalid=2056, Unknown=0, NotChecked=0, Total=2862 [2024-11-28 04:16:21,430 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand has 54 states, 54 states have (on average 2.074074074074074) internal successors, (112), 54 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:16:39,394 WARN L286 SmtUtils]: Spent 6.83s on a formula simplification. DAG size of input: 151 DAG size of output: 10 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 04:18:52,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:18:52,008 INFO L93 Difference]: Finished difference Result 138 states and 174 transitions. [2024-11-28 04:18:52,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-28 04:18:52,009 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.074074074074074) internal successors, (112), 54 states have internal predecessors, (112), 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) Word has length 60 [2024-11-28 04:18:52,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:18:52,010 INFO L225 Difference]: With dead ends: 138 [2024-11-28 04:18:52,011 INFO L226 Difference]: Without dead ends: 119 [2024-11-28 04:18:52,013 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 151.6s TimeCoverageRelationStatistics Valid=2156, Invalid=4006, Unknown=0, NotChecked=0, Total=6162 [2024-11-28 04:18:52,014 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1359 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 1435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 04:18:52,015 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 93 Invalid, 1435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1359 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 04:18:52,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-11-28 04:18:52,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2024-11-28 04:18:52,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0508474576271187) internal successors, (124), 118 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:18:52,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 124 transitions. [2024-11-28 04:18:52,038 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 124 transitions. Word has length 60 [2024-11-28 04:18:52,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:18:52,038 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 124 transitions. [2024-11-28 04:18:52,038 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.074074074074074) internal successors, (112), 54 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:18:52,038 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 124 transitions. [2024-11-28 04:18:52,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-28 04:18:52,041 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:18:52,041 INFO L218 NwaCegarLoop]: trace histogram [53, 49, 4, 1, 1, 1, 1, 1, 1] [2024-11-28 04:18:52,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 04:18:52,241 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:18:52,242 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:18:52,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:18:52,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1009133226, now seen corresponding path program 6 times [2024-11-28 04:18:52,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:18:52,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919383360] [2024-11-28 04:18:52,243 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:18:52,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:18:52,298 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-11-28 04:18:52,298 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:18:52,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 441 proven. 16 refuted. 0 times theorem prover too weak. 2352 trivial. 0 not checked. [2024-11-28 04:18:52,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:18:52,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919383360] [2024-11-28 04:18:52,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919383360] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:18:52,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693488848] [2024-11-28 04:18:52,499 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:18:52,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:18:52,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:18:52,502 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:18:52,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 04:18:52,629 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-11-28 04:18:52,629 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:18:52,633 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 04:18:52,635 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:18:52,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 441 proven. 16 refuted. 0 times theorem prover too weak. 2352 trivial. 0 not checked. [2024-11-28 04:18:52,696 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:18:52,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 441 proven. 16 refuted. 0 times theorem prover too weak. 2352 trivial. 0 not checked. [2024-11-28 04:18:52,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693488848] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:18:52,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:18:52,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-28 04:18:52,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962914820] [2024-11-28 04:18:52,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:18:52,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 04:18:52,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:18:52,839 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 04:18:52,840 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2024-11-28 04:18:52,840 INFO L87 Difference]: Start difference. First operand 119 states and 124 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:18:56,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-28 04:19:00,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-28 04:19:04,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-28 04:19:08,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-28 04:19:12,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-28 04:19:16,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-28 04:19:21,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-28 04:19:21,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:19:21,556 INFO L93 Difference]: Finished difference Result 178 states and 211 transitions. [2024-11-28 04:19:21,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 04:19:21,557 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 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) Word has length 112 [2024-11-28 04:19:21,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:19:21,558 INFO L225 Difference]: With dead ends: 178 [2024-11-28 04:19:21,558 INFO L226 Difference]: Without dead ends: 174 [2024-11-28 04:19:21,559 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 225 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=230, Invalid=322, Unknown=0, NotChecked=0, Total=552 [2024-11-28 04:19:21,559 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 13 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:19:21,560 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 24 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 118 Invalid, 7 Unknown, 0 Unchecked, 28.2s Time] [2024-11-28 04:19:21,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2024-11-28 04:19:21,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 131. [2024-11-28 04:19:21,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.0923076923076922) internal successors, (142), 130 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:19:21,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 142 transitions. [2024-11-28 04:19:21,585 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 142 transitions. Word has length 112 [2024-11-28 04:19:21,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:19:21,585 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 142 transitions. [2024-11-28 04:19:21,586 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:19:21,586 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 142 transitions. [2024-11-28 04:19:21,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-28 04:19:21,587 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:19:21,587 INFO L218 NwaCegarLoop]: trace histogram [59, 49, 10, 1, 1, 1, 1, 1, 1] [2024-11-28 04:19:21,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 04:19:21,791 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:19:21,792 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:19:21,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:19:21,792 INFO L85 PathProgramCache]: Analyzing trace with hash 299754502, now seen corresponding path program 7 times [2024-11-28 04:19:21,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:19:21,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019464457] [2024-11-28 04:19:21,792 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:19:21,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:19:21,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:19:24,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 950 proven. 2450 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-28 04:19:24,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:19:24,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019464457] [2024-11-28 04:19:24,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019464457] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:19:24,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715874777] [2024-11-28 04:19:24,599 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:19:24,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:19:24,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:19:24,601 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:19:24,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec4d9cb2-18ea-4b99-a17b-0cb526001328/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 04:19:24,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:19:24,712 INFO L256 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 104 conjuncts are in the unsatisfiable core [2024-11-28 04:19:24,714 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:19:25,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 867 proven. 2550 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-28 04:19:25,041 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:19:32,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 867 proven. 2550 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-28 04:19:32,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715874777] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:19:32,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:19:32,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 53, 54] total 106 [2024-11-28 04:19:32,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484531706] [2024-11-28 04:19:32,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:19:32,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2024-11-28 04:19:32,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:19:32,288 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2024-11-28 04:19:32,290 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=2964, Invalid=8166, Unknown=0, NotChecked=0, Total=11130 [2024-11-28 04:19:32,291 INFO L87 Difference]: Start difference. First operand 131 states and 142 transitions. Second operand has 106 states, 106 states have (on average 2.0377358490566038) internal successors, (216), 106 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:22:53,633 WARN L286 SmtUtils]: Spent 1.20m on a formula simplification. DAG size of input: 307 DAG size of output: 10 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 04:26:14,952 WARN L286 SmtUtils]: Spent 1.21m on a formula simplification. DAG size of input: 301 DAG size of output: 10 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 04:29:17,283 WARN L286 SmtUtils]: Spent 1.19m on a formula simplification. DAG size of input: 295 DAG size of output: 10 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)