./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_20-1.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_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_20-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1 --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 0642f258b99d0be7a55bf1ef77240ba2f36dd3da56337cf262b8aebc4e0cc323 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 12:37:15,484 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 12:37:15,543 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-12-02 12:37:15,548 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 12:37:15,548 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 12:37:15,571 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 12:37:15,571 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 12:37:15,571 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 12:37:15,572 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 12:37:15,572 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 12:37:15,572 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 12:37:15,572 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 12:37:15,572 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 12:37:15,572 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 12:37:15,573 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 12:37:15,573 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 12:37:15,573 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-12-02 12:37:15,573 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 12:37:15,573 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 12:37:15,573 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 12:37:15,573 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 12:37:15,573 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-12-02 12:37:15,573 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 12:37:15,573 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-12-02 12:37:15,573 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 12:37:15,574 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-12-02 12:37:15,574 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 12:37:15,574 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 12:37:15,574 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 12:37:15,574 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 12:37:15,574 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 12:37:15,574 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 12:37:15,574 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 12:37:15,574 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 12:37:15,574 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 12:37:15,574 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 12:37:15,574 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 12:37:15,575 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 12:37:15,575 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 12:37:15,575 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 12:37:15,575 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-12-02 12:37:15,575 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-12-02 12:37:15,575 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 12:37:15,575 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 12:37:15,575 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 12:37:15,575 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 12:37:15,575 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 12:37:15,575 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 12:37:15,576 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_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1 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 -> 0642f258b99d0be7a55bf1ef77240ba2f36dd3da56337cf262b8aebc4e0cc323 [2024-12-02 12:37:15,815 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 12:37:15,824 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 12:37:15,826 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 12:37:15,828 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 12:37:15,828 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 12:37:15,829 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/recursive-simple/fibo_2calls_20-1.c [2024-12-02 12:37:18,440 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/data/af7e1474e/0355ae75060f4ba088c77b50141d4e43/FLAG05d97d5c6 [2024-12-02 12:37:18,616 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 12:37:18,617 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/sv-benchmarks/c/recursive-simple/fibo_2calls_20-1.c [2024-12-02 12:37:18,622 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/data/af7e1474e/0355ae75060f4ba088c77b50141d4e43/FLAG05d97d5c6 [2024-12-02 12:37:18,635 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/data/af7e1474e/0355ae75060f4ba088c77b50141d4e43 [2024-12-02 12:37:18,637 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 12:37:18,638 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 12:37:18,639 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 12:37:18,640 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 12:37:18,643 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 12:37:18,643 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:37:18" (1/1) ... [2024-12-02 12:37:18,644 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ca83f3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:37:18, skipping insertion in model container [2024-12-02 12:37:18,644 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:37:18" (1/1) ... [2024-12-02 12:37:18,654 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 12:37:18,767 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_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/sv-benchmarks/c/recursive-simple/fibo_2calls_20-1.c[951,964] [2024-12-02 12:37:18,770 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 12:37:18,779 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 12:37:18,789 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_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/sv-benchmarks/c/recursive-simple/fibo_2calls_20-1.c[951,964] [2024-12-02 12:37:18,790 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 12:37:18,800 INFO L204 MainTranslator]: Completed translation [2024-12-02 12:37:18,800 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:37:18 WrapperNode [2024-12-02 12:37:18,800 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 12:37:18,801 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 12:37:18,801 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 12:37:18,801 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 12:37:18,807 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:37:18" (1/1) ... [2024-12-02 12:37:18,811 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:37:18" (1/1) ... [2024-12-02 12:37:18,821 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2024-12-02 12:37:18,822 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 12:37:18,823 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 12:37:18,823 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 12:37:18,823 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 12:37:18,829 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:37:18" (1/1) ... [2024-12-02 12:37:18,829 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:37:18" (1/1) ... [2024-12-02 12:37:18,830 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:37:18" (1/1) ... [2024-12-02 12:37:18,839 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]. [2024-12-02 12:37:18,839 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:37:18" (1/1) ... [2024-12-02 12:37:18,840 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:37:18" (1/1) ... [2024-12-02 12:37:18,842 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:37:18" (1/1) ... [2024-12-02 12:37:18,842 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:37:18" (1/1) ... [2024-12-02 12:37:18,844 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:37:18" (1/1) ... [2024-12-02 12:37:18,845 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:37:18" (1/1) ... [2024-12-02 12:37:18,845 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:37:18" (1/1) ... [2024-12-02 12:37:18,846 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 12:37:18,847 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 12:37:18,847 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 12:37:18,847 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 12:37:18,848 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:37:18" (1/1) ... [2024-12-02 12:37:18,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 12:37:18,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:37:18,872 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 12:37:18,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 12:37:18,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 12:37:18,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 12:37:18,894 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2024-12-02 12:37:18,894 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2024-12-02 12:37:18,894 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2024-12-02 12:37:18,894 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2024-12-02 12:37:18,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 12:37:18,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 12:37:18,939 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 12:37:18,941 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 12:37:19,045 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-12-02 12:37:19,046 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 12:37:19,054 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 12:37:19,054 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2024-12-02 12:37:19,055 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:37:19 BoogieIcfgContainer [2024-12-02 12:37:19,055 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 12:37:19,057 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 12:37:19,057 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 12:37:19,062 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 12:37:19,062 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:37:18" (1/3) ... [2024-12-02 12:37:19,062 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@739aec53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:37:19, skipping insertion in model container [2024-12-02 12:37:19,062 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:37:18" (2/3) ... [2024-12-02 12:37:19,063 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@739aec53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:37:19, skipping insertion in model container [2024-12-02 12:37:19,063 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:37:19" (3/3) ... [2024-12-02 12:37:19,064 INFO L128 eAbstractionObserver]: Analyzing ICFG fibo_2calls_20-1.c [2024-12-02 12:37:19,078 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 12:37:19,079 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fibo_2calls_20-1.c that has 3 procedures, 29 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2024-12-02 12:37:19,123 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 12:37:19,134 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;@382f7d20, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 12:37:19,135 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-12-02 12:37:19,138 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-12-02 12:37:19,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-12-02 12:37:19,144 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:37:19,144 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:37:19,145 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:37:19,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:37:19,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1123300790, now seen corresponding path program 1 times [2024-12-02 12:37:19,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:37:19,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139966522] [2024-12-02 12:37:19,158 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:37:19,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:37:19,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:37:19,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:37:19,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:37:19,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139966522] [2024-12-02 12:37:19,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139966522] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:37:19,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:37:19,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 12:37:19,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465050423] [2024-12-02 12:37:19,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:37:19,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 12:37:19,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:37:19,349 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 12:37:19,350 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 12:37:19,351 INFO L87 Difference]: Start difference. First operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-12-02 12:37:19,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:37:19,391 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2024-12-02 12:37:19,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 12:37:19,393 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-12-02 12:37:19,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:37:19,398 INFO L225 Difference]: With dead ends: 39 [2024-12-02 12:37:19,398 INFO L226 Difference]: Without dead ends: 27 [2024-12-02 12:37:19,400 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 12:37:19,402 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 12:37:19,403 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 124 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 12:37:19,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-12-02 12:37:19,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-12-02 12:37:19,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-12-02 12:37:19,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2024-12-02 12:37:19,430 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2024-12-02 12:37:19,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:37:19,430 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2024-12-02 12:37:19,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-12-02 12:37:19,431 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-12-02 12:37:19,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-12-02 12:37:19,432 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:37:19,432 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:37:19,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 12:37:19,432 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:37:19,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:37:19,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1177745932, now seen corresponding path program 1 times [2024-12-02 12:37:19,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:37:19,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085604998] [2024-12-02 12:37:19,433 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:37:19,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:37:19,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:37:19,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:37:19,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:37:19,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085604998] [2024-12-02 12:37:19,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085604998] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:37:19,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:37:19,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 12:37:19,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863026916] [2024-12-02 12:37:19,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:37:19,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 12:37:19,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:37:19,515 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 12:37:19,515 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 12:37:19,515 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-12-02 12:37:19,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:37:19,537 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2024-12-02 12:37:19,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 12:37:19,538 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-12-02 12:37:19,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:37:19,539 INFO L225 Difference]: With dead ends: 33 [2024-12-02 12:37:19,539 INFO L226 Difference]: Without dead ends: 29 [2024-12-02 12:37:19,540 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 12:37:19,540 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 12:37:19,541 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 125 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 12:37:19,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-12-02 12:37:19,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2024-12-02 12:37:19,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-12-02 12:37:19,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2024-12-02 12:37:19,547 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2024-12-02 12:37:19,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:37:19,547 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2024-12-02 12:37:19,548 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-12-02 12:37:19,548 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-12-02 12:37:19,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-12-02 12:37:19,549 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:37:19,549 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:37:19,549 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-02 12:37:19,549 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:37:19,550 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:37:19,550 INFO L85 PathProgramCache]: Analyzing trace with hash 2110588723, now seen corresponding path program 1 times [2024-12-02 12:37:19,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:37:19,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10216477] [2024-12-02 12:37:19,550 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:37:19,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:37:19,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:37:19,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 12:37:19,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:37:19,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10216477] [2024-12-02 12:37:19,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10216477] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:37:19,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563563496] [2024-12-02 12:37:19,665 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:37:19,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:37:19,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:37:19,667 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:37:19,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 12:37:19,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:37:19,716 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-12-02 12:37:19,720 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:37:19,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 12:37:19,820 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:37:20,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 12:37:20,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563563496] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:37:20,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:37:20,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2024-12-02 12:37:20,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861474303] [2024-12-02 12:37:20,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:37:20,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-12-02 12:37:20,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:37:20,023 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-12-02 12:37:20,023 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-12-02 12:37:20,023 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2024-12-02 12:37:20,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:37:20,138 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2024-12-02 12:37:20,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 12:37:20,139 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 23 [2024-12-02 12:37:20,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:37:20,140 INFO L225 Difference]: With dead ends: 55 [2024-12-02 12:37:20,140 INFO L226 Difference]: Without dead ends: 31 [2024-12-02 12:37:20,141 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-12-02 12:37:20,141 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 22 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 12:37:20,142 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 105 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 12:37:20,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-12-02 12:37:20,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2024-12-02 12:37:20,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-12-02 12:37:20,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2024-12-02 12:37:20,149 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2024-12-02 12:37:20,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:37:20,149 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2024-12-02 12:37:20,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2024-12-02 12:37:20,149 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2024-12-02 12:37:20,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-12-02 12:37:20,150 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:37:20,150 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:37:20,158 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 12:37:20,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:37:20,351 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:37:20,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:37:20,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1277869167, now seen corresponding path program 1 times [2024-12-02 12:37:20,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:37:20,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548981893] [2024-12-02 12:37:20,352 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:37:20,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:37:20,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:37:20,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 12:37:20,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:37:20,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548981893] [2024-12-02 12:37:20,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548981893] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:37:20,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886771594] [2024-12-02 12:37:20,444 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:37:20,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:37:20,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:37:20,446 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:37:20,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 12:37:20,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:37:20,484 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-12-02 12:37:20,485 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:37:20,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 12:37:20,513 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:37:20,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 12:37:20,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886771594] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:37:20,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:37:20,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2024-12-02 12:37:20,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294932873] [2024-12-02 12:37:20,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:37:20,688 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-12-02 12:37:20,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:37:20,689 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-12-02 12:37:20,689 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-12-02 12:37:20,689 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2024-12-02 12:37:20,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:37:20,819 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2024-12-02 12:37:20,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 12:37:20,820 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 24 [2024-12-02 12:37:20,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:37:20,821 INFO L225 Difference]: With dead ends: 40 [2024-12-02 12:37:20,821 INFO L226 Difference]: Without dead ends: 36 [2024-12-02 12:37:20,822 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-12-02 12:37:20,822 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 12:37:20,823 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 135 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 12:37:20,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-12-02 12:37:20,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2024-12-02 12:37:20,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2024-12-02 12:37:20,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2024-12-02 12:37:20,829 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 24 [2024-12-02 12:37:20,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:37:20,830 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2024-12-02 12:37:20,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2024-12-02 12:37:20,830 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2024-12-02 12:37:20,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-12-02 12:37:20,831 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:37:20,831 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:37:20,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 12:37:21,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:37:21,032 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:37:21,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:37:21,032 INFO L85 PathProgramCache]: Analyzing trace with hash -2061621832, now seen corresponding path program 1 times [2024-12-02 12:37:21,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:37:21,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541185069] [2024-12-02 12:37:21,032 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:37:21,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:37:21,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:37:21,118 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 12:37:21,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:37:21,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541185069] [2024-12-02 12:37:21,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541185069] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:37:21,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671484770] [2024-12-02 12:37:21,118 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:37:21,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:37:21,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:37:21,120 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:37:21,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 12:37:21,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:37:21,165 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 12:37:21,166 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:37:21,237 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-12-02 12:37:21,237 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:37:21,569 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 12:37:21,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671484770] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:37:21,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:37:21,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 14 [2024-12-02 12:37:21,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929631677] [2024-12-02 12:37:21,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:37:21,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-12-02 12:37:21,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:37:21,571 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-12-02 12:37:21,571 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-12-02 12:37:21,571 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2024-12-02 12:37:21,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:37:21,723 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2024-12-02 12:37:21,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 12:37:21,724 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) Word has length 36 [2024-12-02 12:37:21,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:37:21,725 INFO L225 Difference]: With dead ends: 69 [2024-12-02 12:37:21,725 INFO L226 Difference]: Without dead ends: 38 [2024-12-02 12:37:21,726 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-12-02 12:37:21,727 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 18 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 12:37:21,727 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 146 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 12:37:21,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-12-02 12:37:21,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2024-12-02 12:37:21,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.173913043478261) internal successors, (27), 26 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2024-12-02 12:37:21,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2024-12-02 12:37:21,733 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 36 [2024-12-02 12:37:21,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:37:21,734 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2024-12-02 12:37:21,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2024-12-02 12:37:21,734 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2024-12-02 12:37:21,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-12-02 12:37:21,735 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:37:21,735 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:37:21,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 12:37:21,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:37:21,936 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:37:21,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:37:21,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1167294498, now seen corresponding path program 1 times [2024-12-02 12:37:21,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:37:21,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931486222] [2024-12-02 12:37:21,936 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:37:21,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:37:21,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:37:22,049 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-12-02 12:37:22,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:37:22,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931486222] [2024-12-02 12:37:22,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931486222] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:37:22,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388828249] [2024-12-02 12:37:22,049 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:37:22,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:37:22,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:37:22,051 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:37:22,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 12:37:22,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:37:22,088 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 12:37:22,089 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:37:22,166 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 12:37:22,166 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:37:22,481 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 12:37:22,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388828249] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:37:22,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:37:22,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 18 [2024-12-02 12:37:22,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422077099] [2024-12-02 12:37:22,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:37:22,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-12-02 12:37:22,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:37:22,483 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-12-02 12:37:22,483 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2024-12-02 12:37:22,483 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2024-12-02 12:37:22,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:37:22,837 INFO L93 Difference]: Finished difference Result 101 states and 161 transitions. [2024-12-02 12:37:22,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-12-02 12:37:22,837 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) Word has length 37 [2024-12-02 12:37:22,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:37:22,839 INFO L225 Difference]: With dead ends: 101 [2024-12-02 12:37:22,839 INFO L226 Difference]: Without dead ends: 68 [2024-12-02 12:37:22,840 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2024-12-02 12:37:22,840 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 39 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 12:37:22,840 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 300 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 12:37:22,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-12-02 12:37:22,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2024-12-02 12:37:22,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 39 states have internal predecessors, (41), 11 states have call successors, (11), 3 states have call predecessors, (11), 9 states have return successors, (34), 13 states have call predecessors, (34), 11 states have call successors, (34) [2024-12-02 12:37:22,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 86 transitions. [2024-12-02 12:37:22,851 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 86 transitions. Word has length 37 [2024-12-02 12:37:22,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:37:22,852 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 86 transitions. [2024-12-02 12:37:22,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2024-12-02 12:37:22,852 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 86 transitions. [2024-12-02 12:37:22,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-12-02 12:37:22,853 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:37:22,853 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:37:22,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 12:37:23,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-12-02 12:37:23,054 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:37:23,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:37:23,054 INFO L85 PathProgramCache]: Analyzing trace with hash 384535367, now seen corresponding path program 1 times [2024-12-02 12:37:23,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:37:23,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255037449] [2024-12-02 12:37:23,055 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:37:23,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:37:23,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:37:23,158 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-12-02 12:37:23,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:37:23,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255037449] [2024-12-02 12:37:23,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255037449] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:37:23,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998756261] [2024-12-02 12:37:23,159 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:37:23,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:37:23,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:37:23,161 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:37:23,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 12:37:23,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:37:23,223 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-12-02 12:37:23,225 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:37:23,294 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-12-02 12:37:23,294 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:37:23,734 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-12-02 12:37:23,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998756261] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:37:23,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:37:23,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 17 [2024-12-02 12:37:23,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213740001] [2024-12-02 12:37:23,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:37:23,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-12-02 12:37:23,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:37:23,736 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-12-02 12:37:23,736 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2024-12-02 12:37:23,736 INFO L87 Difference]: Start difference. First operand 56 states and 86 transitions. Second operand has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) [2024-12-02 12:37:23,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:37:23,906 INFO L93 Difference]: Finished difference Result 102 states and 193 transitions. [2024-12-02 12:37:23,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-02 12:37:23,906 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) Word has length 51 [2024-12-02 12:37:23,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:37:23,908 INFO L225 Difference]: With dead ends: 102 [2024-12-02 12:37:23,908 INFO L226 Difference]: Without dead ends: 98 [2024-12-02 12:37:23,909 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2024-12-02 12:37:23,909 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 35 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 12:37:23,910 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 161 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 12:37:23,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-12-02 12:37:23,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2024-12-02 12:37:23,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 40 states have (on average 1.15) internal successors, (46), 44 states have internal predecessors, (46), 12 states have call successors, (12), 3 states have call predecessors, (12), 11 states have return successors, (48), 16 states have call predecessors, (48), 12 states have call successors, (48) [2024-12-02 12:37:23,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 106 transitions. [2024-12-02 12:37:23,927 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 106 transitions. Word has length 51 [2024-12-02 12:37:23,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:37:23,927 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 106 transitions. [2024-12-02 12:37:23,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) [2024-12-02 12:37:23,928 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 106 transitions. [2024-12-02 12:37:23,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-12-02 12:37:23,931 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:37:23,931 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:37:23,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 12:37:24,132 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:37:24,133 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:37:24,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:37:24,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1770426885, now seen corresponding path program 1 times [2024-12-02 12:37:24,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:37:24,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778646393] [2024-12-02 12:37:24,136 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:37:24,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:37:24,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:37:24,339 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 44 proven. 81 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2024-12-02 12:37:24,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:37:24,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778646393] [2024-12-02 12:37:24,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778646393] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:37:24,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114012581] [2024-12-02 12:37:24,340 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:37:24,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:37:24,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:37:24,342 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:37:24,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 12:37:24,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:37:24,409 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-12-02 12:37:24,412 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:37:24,529 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 17 proven. 119 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-12-02 12:37:24,529 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:37:25,295 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 17 proven. 129 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2024-12-02 12:37:25,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114012581] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:37:25,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:37:25,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 23 [2024-12-02 12:37:25,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600968455] [2024-12-02 12:37:25,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:37:25,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-12-02 12:37:25,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:37:25,297 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-12-02 12:37:25,297 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2024-12-02 12:37:25,297 INFO L87 Difference]: Start difference. First operand 64 states and 106 transitions. Second operand has 23 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 23 states have internal predecessors, (75), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 10 states have call predecessors, (27), 18 states have call successors, (27) [2024-12-02 12:37:25,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:37:25,858 INFO L93 Difference]: Finished difference Result 177 states and 369 transitions. [2024-12-02 12:37:25,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-12-02 12:37:25,858 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 23 states have internal predecessors, (75), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 10 states have call predecessors, (27), 18 states have call successors, (27) Word has length 107 [2024-12-02 12:37:25,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:37:25,861 INFO L225 Difference]: With dead ends: 177 [2024-12-02 12:37:25,861 INFO L226 Difference]: Without dead ends: 104 [2024-12-02 12:37:25,864 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 197 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2024-12-02 12:37:25,864 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 78 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 12:37:25,865 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 352 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 12:37:25,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-12-02 12:37:25,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2024-12-02 12:37:25,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 64 states have internal predecessors, (73), 16 states have call successors, (16), 8 states have call predecessors, (16), 14 states have return successors, (43), 20 states have call predecessors, (43), 16 states have call successors, (43) [2024-12-02 12:37:25,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 132 transitions. [2024-12-02 12:37:25,885 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 132 transitions. Word has length 107 [2024-12-02 12:37:25,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:37:25,886 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 132 transitions. [2024-12-02 12:37:25,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 23 states have internal predecessors, (75), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 10 states have call predecessors, (27), 18 states have call successors, (27) [2024-12-02 12:37:25,886 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 132 transitions. [2024-12-02 12:37:25,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2024-12-02 12:37:25,889 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:37:25,889 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 9, 9, 9, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:37:25,896 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-02 12:37:26,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:37:26,090 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:37:26,090 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:37:26,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1566869308, now seen corresponding path program 1 times [2024-12-02 12:37:26,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:37:26,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928773111] [2024-12-02 12:37:26,091 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:37:26,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:37:26,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:37:26,328 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 42 proven. 158 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2024-12-02 12:37:26,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:37:26,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928773111] [2024-12-02 12:37:26,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928773111] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:37:26,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923587721] [2024-12-02 12:37:26,329 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:37:26,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:37:26,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:37:26,330 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:37:26,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 12:37:26,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:37:26,431 INFO L256 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-12-02 12:37:26,436 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:37:26,576 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 29 proven. 212 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2024-12-02 12:37:26,577 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:37:27,804 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 29 proven. 228 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2024-12-02 12:37:27,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923587721] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:37:27,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:37:27,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 15] total 23 [2024-12-02 12:37:27,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253977923] [2024-12-02 12:37:27,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:37:27,805 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-12-02 12:37:27,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:37:27,806 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-12-02 12:37:27,806 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2024-12-02 12:37:27,807 INFO L87 Difference]: Start difference. First operand 93 states and 132 transitions. Second operand has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) [2024-12-02 12:37:28,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:37:28,034 INFO L93 Difference]: Finished difference Result 132 states and 227 transitions. [2024-12-02 12:37:28,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-12-02 12:37:28,035 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) Word has length 146 [2024-12-02 12:37:28,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:37:28,037 INFO L225 Difference]: With dead ends: 132 [2024-12-02 12:37:28,037 INFO L226 Difference]: Without dead ends: 128 [2024-12-02 12:37:28,038 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 276 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=801, Unknown=0, NotChecked=0, Total=992 [2024-12-02 12:37:28,038 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 12:37:28,039 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 209 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 12:37:28,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-12-02 12:37:28,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 118. [2024-12-02 12:37:28,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 77 states have (on average 1.1428571428571428) internal successors, (88), 79 states have internal predecessors, (88), 21 states have call successors, (21), 8 states have call predecessors, (21), 19 states have return successors, (85), 30 states have call predecessors, (85), 21 states have call successors, (85) [2024-12-02 12:37:28,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 194 transitions. [2024-12-02 12:37:28,059 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 194 transitions. Word has length 146 [2024-12-02 12:37:28,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:37:28,060 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 194 transitions. [2024-12-02 12:37:28,060 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) [2024-12-02 12:37:28,060 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 194 transitions. [2024-12-02 12:37:28,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2024-12-02 12:37:28,063 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:37:28,063 INFO L218 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 18, 16, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 8, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:37:28,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-12-02 12:37:28,264 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:37:28,264 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:37:28,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:37:28,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1279109938, now seen corresponding path program 2 times [2024-12-02 12:37:28,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:37:28,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544537335] [2024-12-02 12:37:28,265 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 12:37:28,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:37:28,304 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 12:37:28,304 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:37:28,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 158 proven. 490 refuted. 0 times theorem prover too weak. 1585 trivial. 0 not checked. [2024-12-02 12:37:28,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:37:28,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544537335] [2024-12-02 12:37:28,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544537335] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:37:28,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451054185] [2024-12-02 12:37:28,659 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 12:37:28,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:37:28,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:37:28,660 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:37:28,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-02 12:37:28,798 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 12:37:28,798 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:37:28,800 INFO L256 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-12-02 12:37:28,805 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:37:28,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 87 proven. 569 refuted. 0 times theorem prover too weak. 1577 trivial. 0 not checked. [2024-12-02 12:37:28,953 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:37:30,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 87 proven. 593 refuted. 0 times theorem prover too weak. 1553 trivial. 0 not checked. [2024-12-02 12:37:30,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451054185] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:37:30,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:37:30,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 17] total 29 [2024-12-02 12:37:30,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145120419] [2024-12-02 12:37:30,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:37:30,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-12-02 12:37:30,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:37:30,688 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-12-02 12:37:30,688 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2024-12-02 12:37:30,689 INFO L87 Difference]: Start difference. First operand 118 states and 194 transitions. Second operand has 29 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 29 states have internal predecessors, (95), 24 states have call successors, (30), 1 states have call predecessors, (30), 12 states have return successors, (37), 13 states have call predecessors, (37), 24 states have call successors, (37) [2024-12-02 12:37:31,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:37:31,461 INFO L93 Difference]: Finished difference Result 323 states and 666 transitions. [2024-12-02 12:37:31,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-12-02 12:37:31,461 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 29 states have internal predecessors, (95), 24 states have call successors, (30), 1 states have call predecessors, (30), 12 states have return successors, (37), 13 states have call predecessors, (37), 24 states have call successors, (37) Word has length 284 [2024-12-02 12:37:31,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:37:31,464 INFO L225 Difference]: With dead ends: 323 [2024-12-02 12:37:31,464 INFO L226 Difference]: Without dead ends: 214 [2024-12-02 12:37:31,466 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 606 GetRequests, 547 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=449, Invalid=2413, Unknown=0, NotChecked=0, Total=2862 [2024-12-02 12:37:31,467 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 129 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-12-02 12:37:31,467 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 481 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-12-02 12:37:31,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2024-12-02 12:37:31,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 184. [2024-12-02 12:37:31,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 123 states have (on average 1.1869918699186992) internal successors, (146), 123 states have internal predecessors, (146), 35 states have call successors, (35), 17 states have call predecessors, (35), 25 states have return successors, (120), 43 states have call predecessors, (120), 35 states have call successors, (120) [2024-12-02 12:37:31,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 301 transitions. [2024-12-02 12:37:31,490 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 301 transitions. Word has length 284 [2024-12-02 12:37:31,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:37:31,490 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 301 transitions. [2024-12-02 12:37:31,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 29 states have internal predecessors, (95), 24 states have call successors, (30), 1 states have call predecessors, (30), 12 states have return successors, (37), 13 states have call predecessors, (37), 24 states have call successors, (37) [2024-12-02 12:37:31,490 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 301 transitions. [2024-12-02 12:37:31,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2024-12-02 12:37:31,495 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:37:31,496 INFO L218 NwaCegarLoop]: trace histogram [26, 26, 23, 23, 20, 18, 13, 13, 13, 13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 11, 9, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:37:31,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-12-02 12:37:31,696 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-12-02 12:37:31,696 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:37:31,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:37:31,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1509408310, now seen corresponding path program 3 times [2024-12-02 12:37:31,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:37:31,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377904869] [2024-12-02 12:37:31,697 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 12:37:31,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:37:31,729 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-12-02 12:37:31,729 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:37:31,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3187 backedges. 488 proven. 80 refuted. 0 times theorem prover too weak. 2619 trivial. 0 not checked. [2024-12-02 12:37:31,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:37:31,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377904869] [2024-12-02 12:37:31,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377904869] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:37:31,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993044906] [2024-12-02 12:37:31,873 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 12:37:31,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:37:31,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:37:31,875 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:37:31,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-12-02 12:37:32,002 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-12-02 12:37:32,003 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:37:32,004 INFO L256 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-12-02 12:37:32,010 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:37:32,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3187 backedges. 496 proven. 83 refuted. 0 times theorem prover too weak. 2608 trivial. 0 not checked. [2024-12-02 12:37:32,090 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:37:33,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3187 backedges. 500 proven. 89 refuted. 0 times theorem prover too weak. 2598 trivial. 0 not checked. [2024-12-02 12:37:33,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993044906] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:37:33,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:37:33,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 18 [2024-12-02 12:37:33,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215758738] [2024-12-02 12:37:33,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:37:33,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-12-02 12:37:33,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:37:33,185 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-12-02 12:37:33,186 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2024-12-02 12:37:33,186 INFO L87 Difference]: Start difference. First operand 184 states and 301 transitions. Second operand has 18 states, 16 states have (on average 4.0) internal successors, (64), 18 states have internal predecessors, (64), 12 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 10 states have call predecessors, (22), 12 states have call successors, (22) [2024-12-02 12:37:33,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:37:33,369 INFO L93 Difference]: Finished difference Result 255 states and 465 transitions. [2024-12-02 12:37:33,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-02 12:37:33,370 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 4.0) internal successors, (64), 18 states have internal predecessors, (64), 12 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 10 states have call predecessors, (22), 12 states have call successors, (22) Word has length 336 [2024-12-02 12:37:33,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:37:33,375 INFO L225 Difference]: With dead ends: 255 [2024-12-02 12:37:33,375 INFO L226 Difference]: Without dead ends: 251 [2024-12-02 12:37:33,376 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 687 GetRequests, 662 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2024-12-02 12:37:33,376 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 41 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 12:37:33,376 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 164 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 12:37:33,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2024-12-02 12:37:33,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 224. [2024-12-02 12:37:33,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 148 states have (on average 1.1689189189189189) internal successors, (173), 149 states have internal predecessors, (173), 45 states have call successors, (45), 20 states have call predecessors, (45), 30 states have return successors, (187), 54 states have call predecessors, (187), 45 states have call successors, (187) [2024-12-02 12:37:33,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 405 transitions. [2024-12-02 12:37:33,404 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 405 transitions. Word has length 336 [2024-12-02 12:37:33,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:37:33,405 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 405 transitions. [2024-12-02 12:37:33,405 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 4.0) internal successors, (64), 18 states have internal predecessors, (64), 12 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 10 states have call predecessors, (22), 12 states have call successors, (22) [2024-12-02 12:37:33,405 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 405 transitions. [2024-12-02 12:37:33,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2024-12-02 12:37:33,410 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:37:33,410 INFO L218 NwaCegarLoop]: trace histogram [42, 42, 30, 29, 29, 24, 21, 21, 21, 21, 21, 21, 21, 16, 14, 14, 14, 14, 14, 14, 14, 12, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:37:33,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-12-02 12:37:33,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-12-02 12:37:33,610 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:37:33,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:37:33,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1192940537, now seen corresponding path program 4 times [2024-12-02 12:37:33,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:37:33,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348211522] [2024-12-02 12:37:33,611 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 12:37:33,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:37:33,676 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 12:37:33,676 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:37:33,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6983 backedges. 182 proven. 720 refuted. 0 times theorem prover too weak. 6081 trivial. 0 not checked. [2024-12-02 12:37:33,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:37:33,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348211522] [2024-12-02 12:37:33,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348211522] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:37:33,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972389635] [2024-12-02 12:37:33,928 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 12:37:33,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:37:33,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:37:33,930 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:37:33,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-12-02 12:37:34,110 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 12:37:34,110 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:37:34,113 INFO L256 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 12:37:34,118 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:37:34,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6983 backedges. 1267 proven. 6 refuted. 0 times theorem prover too weak. 5710 trivial. 0 not checked. [2024-12-02 12:37:34,174 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:37:35,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6983 backedges. 188 proven. 860 refuted. 0 times theorem prover too weak. 5935 trivial. 0 not checked. [2024-12-02 12:37:35,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972389635] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:37:35,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:37:35,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2024-12-02 12:37:35,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851491375] [2024-12-02 12:37:35,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:37:35,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-12-02 12:37:35,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:37:35,575 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-12-02 12:37:35,575 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-12-02 12:37:35,576 INFO L87 Difference]: Start difference. First operand 224 states and 405 transitions. Second operand has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (20), 5 states have call predecessors, (20), 7 states have call successors, (20) [2024-12-02 12:37:35,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:37:35,713 INFO L93 Difference]: Finished difference Result 412 states and 767 transitions. [2024-12-02 12:37:35,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 12:37:35,714 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (20), 5 states have call predecessors, (20), 7 states have call successors, (20) Word has length 484 [2024-12-02 12:37:35,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:37:35,718 INFO L225 Difference]: With dead ends: 412 [2024-12-02 12:37:35,718 INFO L226 Difference]: Without dead ends: 193 [2024-12-02 12:37:35,721 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 980 GetRequests, 958 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2024-12-02 12:37:35,721 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 23 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 12:37:35,722 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 153 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 12:37:35,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2024-12-02 12:37:35,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 186. [2024-12-02 12:37:35,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 125 states have (on average 1.16) internal successors, (145), 124 states have internal predecessors, (145), 37 states have call successors, (37), 19 states have call predecessors, (37), 23 states have return successors, (112), 42 states have call predecessors, (112), 37 states have call successors, (112) [2024-12-02 12:37:35,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 294 transitions. [2024-12-02 12:37:35,745 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 294 transitions. Word has length 484 [2024-12-02 12:37:35,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:37:35,745 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 294 transitions. [2024-12-02 12:37:35,745 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (20), 5 states have call predecessors, (20), 7 states have call successors, (20) [2024-12-02 12:37:35,746 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 294 transitions. [2024-12-02 12:37:35,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2024-12-02 12:37:35,749 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:37:35,750 INFO L218 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 21, 20, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 8, 8, 6, 4, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:37:35,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-12-02 12:37:35,950 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-12-02 12:37:35,950 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:37:35,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:37:35,951 INFO L85 PathProgramCache]: Analyzing trace with hash -240108639, now seen corresponding path program 5 times [2024-12-02 12:37:35,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:37:35,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491698345] [2024-12-02 12:37:35,951 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 12:37:35,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:37:35,968 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 12:37:35,968 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:37:36,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3476 backedges. 183 proven. 538 refuted. 0 times theorem prover too weak. 2755 trivial. 0 not checked. [2024-12-02 12:37:36,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:37:36,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491698345] [2024-12-02 12:37:36,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491698345] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:37:36,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480624987] [2024-12-02 12:37:36,055 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 12:37:36,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:37:36,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:37:36,057 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:37:36,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-12-02 12:37:36,172 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 12:37:36,172 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:37:36,173 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-12-02 12:37:36,178 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:37:36,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3476 backedges. 1045 proven. 13 refuted. 0 times theorem prover too weak. 2418 trivial. 0 not checked. [2024-12-02 12:37:36,267 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:37:37,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3476 backedges. 183 proven. 538 refuted. 0 times theorem prover too weak. 2755 trivial. 0 not checked. [2024-12-02 12:37:37,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480624987] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:37:37,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:37:37,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 17 [2024-12-02 12:37:37,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829540935] [2024-12-02 12:37:37,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:37:37,291 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-12-02 12:37:37,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:37:37,292 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-12-02 12:37:37,292 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2024-12-02 12:37:37,292 INFO L87 Difference]: Start difference. First operand 186 states and 294 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 8 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (22), 6 states have call predecessors, (22), 8 states have call successors, (22) [2024-12-02 12:37:37,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:37:37,414 INFO L93 Difference]: Finished difference Result 345 states and 585 transitions. [2024-12-02 12:37:37,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 12:37:37,414 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 8 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (22), 6 states have call predecessors, (22), 8 states have call successors, (22) Word has length 351 [2024-12-02 12:37:37,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:37:37,417 INFO L225 Difference]: With dead ends: 345 [2024-12-02 12:37:37,417 INFO L226 Difference]: Without dead ends: 147 [2024-12-02 12:37:37,418 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 714 GetRequests, 692 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2024-12-02 12:37:37,419 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 20 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 12:37:37,419 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 163 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 12:37:37,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-12-02 12:37:37,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2024-12-02 12:37:37,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 101 states have (on average 1.1683168316831682) internal successors, (118), 100 states have internal predecessors, (118), 27 states have call successors, (27), 17 states have call predecessors, (27), 18 states have return successors, (77), 29 states have call predecessors, (77), 27 states have call successors, (77) [2024-12-02 12:37:37,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 222 transitions. [2024-12-02 12:37:37,436 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 222 transitions. Word has length 351 [2024-12-02 12:37:37,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:37:37,436 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 222 transitions. [2024-12-02 12:37:37,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 8 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (22), 6 states have call predecessors, (22), 8 states have call successors, (22) [2024-12-02 12:37:37,436 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 222 transitions. [2024-12-02 12:37:37,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2024-12-02 12:37:37,439 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:37:37,439 INFO L218 NwaCegarLoop]: trace histogram [30, 30, 29, 29, 25, 22, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 10, 8, 8, 4, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:37:37,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-12-02 12:37:37,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-12-02 12:37:37,640 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:37:37,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:37:37,640 INFO L85 PathProgramCache]: Analyzing trace with hash 5991049, now seen corresponding path program 6 times [2024-12-02 12:37:37,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:37:37,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121502020] [2024-12-02 12:37:37,640 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 12:37:37,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:37:37,693 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-12-02 12:37:37,694 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:37:38,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4679 backedges. 785 proven. 94 refuted. 0 times theorem prover too weak. 3800 trivial. 0 not checked. [2024-12-02 12:37:38,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:37:38,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121502020] [2024-12-02 12:37:38,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121502020] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:37:38,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646803418] [2024-12-02 12:37:38,019 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 12:37:38,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:37:38,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:37:38,024 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:37:38,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-12-02 12:37:38,218 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-12-02 12:37:38,218 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:37:38,220 INFO L256 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-12-02 12:37:38,226 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:37:38,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4679 backedges. 253 proven. 611 refuted. 0 times theorem prover too weak. 3815 trivial. 0 not checked. [2024-12-02 12:37:38,370 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:37:39,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4679 backedges. 255 proven. 625 refuted. 0 times theorem prover too weak. 3799 trivial. 0 not checked. [2024-12-02 12:37:39,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646803418] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:37:39,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:37:39,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 15] total 28 [2024-12-02 12:37:39,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943646185] [2024-12-02 12:37:39,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:37:39,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-12-02 12:37:39,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:37:39,952 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-12-02 12:37:39,952 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2024-12-02 12:37:39,952 INFO L87 Difference]: Start difference. First operand 147 states and 222 transitions. Second operand has 28 states, 26 states have (on average 3.423076923076923) internal successors, (89), 28 states have internal predecessors, (89), 18 states have call successors, (26), 1 states have call predecessors, (26), 13 states have return successors, (33), 16 states have call predecessors, (33), 18 states have call successors, (33) [2024-12-02 12:37:40,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:37:40,715 INFO L93 Difference]: Finished difference Result 423 states and 742 transitions. [2024-12-02 12:37:40,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-12-02 12:37:40,715 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 3.423076923076923) internal successors, (89), 28 states have internal predecessors, (89), 18 states have call successors, (26), 1 states have call predecessors, (26), 13 states have return successors, (33), 16 states have call predecessors, (33), 18 states have call successors, (33) Word has length 405 [2024-12-02 12:37:40,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:37:40,719 INFO L225 Difference]: With dead ends: 423 [2024-12-02 12:37:40,720 INFO L226 Difference]: Without dead ends: 278 [2024-12-02 12:37:40,722 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 791 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=465, Invalid=2397, Unknown=0, NotChecked=0, Total=2862 [2024-12-02 12:37:40,722 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 132 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-12-02 12:37:40,723 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 362 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-12-02 12:37:40,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2024-12-02 12:37:40,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 199. [2024-12-02 12:37:40,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 136 states have (on average 1.1838235294117647) internal successors, (161), 134 states have internal predecessors, (161), 41 states have call successors, (41), 24 states have call predecessors, (41), 21 states have return successors, (119), 40 states have call predecessors, (119), 41 states have call successors, (119) [2024-12-02 12:37:40,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 321 transitions. [2024-12-02 12:37:40,748 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 321 transitions. Word has length 405 [2024-12-02 12:37:40,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:37:40,749 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 321 transitions. [2024-12-02 12:37:40,749 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 3.423076923076923) internal successors, (89), 28 states have internal predecessors, (89), 18 states have call successors, (26), 1 states have call predecessors, (26), 13 states have return successors, (33), 16 states have call predecessors, (33), 18 states have call successors, (33) [2024-12-02 12:37:40,749 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 321 transitions. [2024-12-02 12:37:40,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2024-12-02 12:37:40,753 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:37:40,753 INFO L218 NwaCegarLoop]: trace histogram [38, 38, 35, 35, 29, 29, 19, 19, 19, 19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 12, 10, 9, 6, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:37:40,763 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-12-02 12:37:40,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-12-02 12:37:40,954 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:37:40,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:37:40,954 INFO L85 PathProgramCache]: Analyzing trace with hash -744556606, now seen corresponding path program 7 times [2024-12-02 12:37:40,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:37:40,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785297564] [2024-12-02 12:37:40,954 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 12:37:40,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:37:41,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:37:41,674 INFO L134 CoverageAnalysis]: Checked inductivity of 7232 backedges. 191 proven. 1248 refuted. 0 times theorem prover too weak. 5793 trivial. 0 not checked. [2024-12-02 12:37:41,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:37:41,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785297564] [2024-12-02 12:37:41,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785297564] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:37:41,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662177971] [2024-12-02 12:37:41,674 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 12:37:41,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:37:41,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:37:41,676 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:37:41,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-12-02 12:37:41,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:37:41,963 INFO L256 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-12-02 12:37:41,968 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:37:42,070 INFO L134 CoverageAnalysis]: Checked inductivity of 7232 backedges. 191 proven. 1248 refuted. 0 times theorem prover too weak. 5793 trivial. 0 not checked. [2024-12-02 12:37:42,070 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:37:44,880 INFO L134 CoverageAnalysis]: Checked inductivity of 7232 backedges. 191 proven. 1281 refuted. 0 times theorem prover too weak. 5760 trivial. 0 not checked. [2024-12-02 12:37:44,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662177971] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:37:44,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:37:44,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 19] total 22 [2024-12-02 12:37:44,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874835474] [2024-12-02 12:37:44,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:37:44,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-12-02 12:37:44,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:37:44,881 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-12-02 12:37:44,882 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2024-12-02 12:37:44,882 INFO L87 Difference]: Start difference. First operand 199 states and 321 transitions. Second operand has 22 states, 20 states have (on average 3.75) internal successors, (75), 22 states have internal predecessors, (75), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 9 states have call predecessors, (27), 19 states have call successors, (27) [2024-12-02 12:37:45,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:37:45,084 INFO L93 Difference]: Finished difference Result 228 states and 388 transitions. [2024-12-02 12:37:45,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-12-02 12:37:45,085 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.75) internal successors, (75), 22 states have internal predecessors, (75), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 9 states have call predecessors, (27), 19 states have call successors, (27) Word has length 500 [2024-12-02 12:37:45,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:37:45,089 INFO L225 Difference]: With dead ends: 228 [2024-12-02 12:37:45,089 INFO L226 Difference]: Without dead ends: 222 [2024-12-02 12:37:45,090 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1024 GetRequests, 989 SyntacticMatches, 8 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2024-12-02 12:37:45,090 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 51 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 12:37:45,090 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 187 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 12:37:45,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-12-02 12:37:45,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 214. [2024-12-02 12:37:45,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 145 states have (on average 1.1724137931034482) internal successors, (170), 143 states have internal predecessors, (170), 44 states have call successors, (44), 24 states have call predecessors, (44), 24 states have return successors, (150), 46 states have call predecessors, (150), 44 states have call successors, (150) [2024-12-02 12:37:45,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 364 transitions. [2024-12-02 12:37:45,117 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 364 transitions. Word has length 500 [2024-12-02 12:37:45,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:37:45,117 INFO L471 AbstractCegarLoop]: Abstraction has 214 states and 364 transitions. [2024-12-02 12:37:45,118 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.75) internal successors, (75), 22 states have internal predecessors, (75), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 9 states have call predecessors, (27), 19 states have call successors, (27) [2024-12-02 12:37:45,118 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 364 transitions. [2024-12-02 12:37:45,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2024-12-02 12:37:45,122 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:37:45,123 INFO L218 NwaCegarLoop]: trace histogram [44, 44, 37, 37, 33, 33, 22, 22, 22, 22, 22, 22, 22, 18, 18, 18, 18, 18, 18, 18, 15, 11, 11, 4, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:37:45,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-12-02 12:37:45,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-12-02 12:37:45,323 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:37:45,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:37:45,324 INFO L85 PathProgramCache]: Analyzing trace with hash 399277922, now seen corresponding path program 8 times [2024-12-02 12:37:45,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:37:45,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934697147] [2024-12-02 12:37:45,324 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 12:37:45,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:37:45,399 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 12:37:45,399 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:37:45,872 INFO L134 CoverageAnalysis]: Checked inductivity of 9040 backedges. 359 proven. 1056 refuted. 0 times theorem prover too weak. 7625 trivial. 0 not checked. [2024-12-02 12:37:45,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:37:45,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934697147] [2024-12-02 12:37:45,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934697147] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:37:45,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098282342] [2024-12-02 12:37:45,873 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 12:37:45,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:37:45,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:37:45,875 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:37:45,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-12-02 12:37:46,177 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 12:37:46,178 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:37:46,181 INFO L256 TraceCheckSpWp]: Trace formula consists of 1254 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-12-02 12:37:46,187 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:37:46,358 INFO L134 CoverageAnalysis]: Checked inductivity of 9040 backedges. 243 proven. 1553 refuted. 0 times theorem prover too weak. 7244 trivial. 0 not checked. [2024-12-02 12:37:46,358 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:37:49,739 INFO L134 CoverageAnalysis]: Checked inductivity of 9040 backedges. 243 proven. 1597 refuted. 0 times theorem prover too weak. 7200 trivial. 0 not checked. [2024-12-02 12:37:49,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098282342] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:37:49,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:37:49,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 21] total 28 [2024-12-02 12:37:49,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036625015] [2024-12-02 12:37:49,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:37:49,740 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-12-02 12:37:49,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:37:49,741 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-12-02 12:37:49,741 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2024-12-02 12:37:49,741 INFO L87 Difference]: Start difference. First operand 214 states and 364 transitions. Second operand has 28 states, 26 states have (on average 3.576923076923077) internal successors, (93), 28 states have internal predecessors, (93), 24 states have call successors, (28), 1 states have call predecessors, (28), 14 states have return successors, (39), 15 states have call predecessors, (39), 24 states have call successors, (39) [2024-12-02 12:37:50,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:37:50,055 INFO L93 Difference]: Finished difference Result 256 states and 481 transitions. [2024-12-02 12:37:50,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-12-02 12:37:50,055 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 3.576923076923077) internal successors, (93), 28 states have internal predecessors, (93), 24 states have call successors, (28), 1 states have call predecessors, (28), 14 states have return successors, (39), 15 states have call predecessors, (39), 24 states have call successors, (39) Word has length 556 [2024-12-02 12:37:50,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:37:50,059 INFO L225 Difference]: With dead ends: 256 [2024-12-02 12:37:50,059 INFO L226 Difference]: Without dead ends: 248 [2024-12-02 12:37:50,060 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1139 GetRequests, 1092 SyntacticMatches, 9 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=292, Invalid=1268, Unknown=0, NotChecked=0, Total=1560 [2024-12-02 12:37:50,060 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 39 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 12:37:50,061 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 241 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 12:37:50,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2024-12-02 12:37:50,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 220. [2024-12-02 12:37:50,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 149 states have (on average 1.167785234899329) internal successors, (174), 147 states have internal predecessors, (174), 44 states have call successors, (44), 24 states have call predecessors, (44), 26 states have return successors, (153), 48 states have call predecessors, (153), 44 states have call successors, (153) [2024-12-02 12:37:50,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 371 transitions. [2024-12-02 12:37:50,090 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 371 transitions. Word has length 556 [2024-12-02 12:37:50,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:37:50,091 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 371 transitions. [2024-12-02 12:37:50,091 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 3.576923076923077) internal successors, (93), 28 states have internal predecessors, (93), 24 states have call successors, (28), 1 states have call predecessors, (28), 14 states have return successors, (39), 15 states have call predecessors, (39), 24 states have call successors, (39) [2024-12-02 12:37:50,091 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 371 transitions. [2024-12-02 12:37:50,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1566 [2024-12-02 12:37:50,111 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:37:50,111 INFO L218 NwaCegarLoop]: trace histogram [128, 128, 101, 101, 95, 92, 64, 64, 64, 64, 64, 64, 64, 50, 50, 50, 50, 50, 50, 50, 42, 36, 31, 6, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:37:50,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-12-02 12:37:50,312 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-12-02 12:37:50,312 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:37:50,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:37:50,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1274023156, now seen corresponding path program 9 times [2024-12-02 12:37:50,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:37:50,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394217411] [2024-12-02 12:37:50,312 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 12:37:50,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:37:50,346 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-12-02 12:37:50,346 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:37:50,416 INFO L134 CoverageAnalysis]: Checked inductivity of 74327 backedges. 2854 proven. 23 refuted. 0 times theorem prover too weak. 71450 trivial. 0 not checked. [2024-12-02 12:37:50,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:37:50,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394217411] [2024-12-02 12:37:50,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394217411] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:37:50,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594899175] [2024-12-02 12:37:50,416 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 12:37:50,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:37:50,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:37:50,418 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:37:50,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-12-02 12:37:50,691 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-12-02 12:37:50,691 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:37:50,693 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 12:37:50,710 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:37:50,792 INFO L134 CoverageAnalysis]: Checked inductivity of 74327 backedges. 5120 proven. 7 refuted. 0 times theorem prover too weak. 69200 trivial. 0 not checked. [2024-12-02 12:37:50,792 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:37:54,320 INFO L134 CoverageAnalysis]: Checked inductivity of 74327 backedges. 3310 proven. 33 refuted. 0 times theorem prover too weak. 70984 trivial. 0 not checked. [2024-12-02 12:37:54,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594899175] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:37:54,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:37:54,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 17 [2024-12-02 12:37:54,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310877941] [2024-12-02 12:37:54,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:37:54,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-12-02 12:37:54,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:37:54,323 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-12-02 12:37:54,323 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2024-12-02 12:37:54,323 INFO L87 Difference]: Start difference. First operand 220 states and 371 transitions. Second operand has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 8 states have call successors, (16), 2 states have call predecessors, (16), 8 states have return successors, (23), 6 states have call predecessors, (23), 8 states have call successors, (23) [2024-12-02 12:37:54,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:37:54,490 INFO L93 Difference]: Finished difference Result 435 states and 841 transitions. [2024-12-02 12:37:54,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-12-02 12:37:54,491 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 8 states have call successors, (16), 2 states have call predecessors, (16), 8 states have return successors, (23), 6 states have call predecessors, (23), 8 states have call successors, (23) Word has length 1565 [2024-12-02 12:37:54,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:37:54,493 INFO L225 Difference]: With dead ends: 435 [2024-12-02 12:37:54,493 INFO L226 Difference]: Without dead ends: 221 [2024-12-02 12:37:54,496 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3143 GetRequests, 3118 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2024-12-02 12:37:54,497 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 40 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 12:37:54,497 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 135 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 12:37:54,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2024-12-02 12:37:54,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 213. [2024-12-02 12:37:54,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 145 states have (on average 1.1586206896551725) internal successors, (168), 142 states have internal predecessors, (168), 42 states have call successors, (42), 24 states have call predecessors, (42), 25 states have return successors, (148), 46 states have call predecessors, (148), 42 states have call successors, (148) [2024-12-02 12:37:54,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 358 transitions. [2024-12-02 12:37:54,531 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 358 transitions. Word has length 1565 [2024-12-02 12:37:54,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:37:54,532 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 358 transitions. [2024-12-02 12:37:54,532 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 8 states have call successors, (16), 2 states have call predecessors, (16), 8 states have return successors, (23), 6 states have call predecessors, (23), 8 states have call successors, (23) [2024-12-02 12:37:54,532 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 358 transitions. [2024-12-02 12:37:54,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1372 [2024-12-02 12:37:54,547 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:37:54,548 INFO L218 NwaCegarLoop]: trace histogram [104, 104, 97, 97, 81, 80, 52, 52, 52, 52, 52, 52, 52, 48, 48, 48, 48, 48, 48, 48, 32, 29, 24, 16, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:37:54,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-12-02 12:37:54,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-12-02 12:37:54,748 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:37:54,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:37:54,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1191776500, now seen corresponding path program 10 times [2024-12-02 12:37:54,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:37:54,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971230730] [2024-12-02 12:37:54,749 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 12:37:54,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:37:54,980 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 12:37:54,980 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:37:56,346 INFO L134 CoverageAnalysis]: Checked inductivity of 56264 backedges. 817 proven. 3789 refuted. 0 times theorem prover too weak. 51658 trivial. 0 not checked. [2024-12-02 12:37:56,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:37:56,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971230730] [2024-12-02 12:37:56,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971230730] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:37:56,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012392777] [2024-12-02 12:37:56,346 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 12:37:56,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:37:56,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:37:56,348 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:37:56,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-12-02 12:37:56,747 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 12:37:56,747 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:37:56,753 INFO L256 TraceCheckSpWp]: Trace formula consists of 2437 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-12-02 12:37:56,782 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:37:56,850 INFO L134 CoverageAnalysis]: Checked inductivity of 56264 backedges. 8034 proven. 68 refuted. 0 times theorem prover too weak. 48162 trivial. 0 not checked. [2024-12-02 12:37:56,850 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:38:00,745 INFO L134 CoverageAnalysis]: Checked inductivity of 56264 backedges. 820 proven. 4160 refuted. 0 times theorem prover too weak. 51284 trivial. 0 not checked. [2024-12-02 12:38:00,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012392777] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:38:00,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:38:00,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 15] total 22 [2024-12-02 12:38:00,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592737243] [2024-12-02 12:38:00,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:38:00,747 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-12-02 12:38:00,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:38:00,748 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-12-02 12:38:00,748 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2024-12-02 12:38:00,749 INFO L87 Difference]: Start difference. First operand 213 states and 358 transitions. Second operand has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 22 states have internal predecessors, (87), 15 states have call successors, (25), 2 states have call predecessors, (25), 8 states have return successors, (29), 8 states have call predecessors, (29), 15 states have call successors, (29) [2024-12-02 12:38:01,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:38:01,078 INFO L93 Difference]: Finished difference Result 425 states and 825 transitions. [2024-12-02 12:38:01,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-12-02 12:38:01,079 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 22 states have internal predecessors, (87), 15 states have call successors, (25), 2 states have call predecessors, (25), 8 states have return successors, (29), 8 states have call predecessors, (29), 15 states have call successors, (29) Word has length 1371 [2024-12-02 12:38:01,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:38:01,081 INFO L225 Difference]: With dead ends: 425 [2024-12-02 12:38:01,081 INFO L226 Difference]: Without dead ends: 218 [2024-12-02 12:38:01,083 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2767 GetRequests, 2728 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=923, Unknown=0, NotChecked=0, Total=1122 [2024-12-02 12:38:01,084 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 37 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 12:38:01,084 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 306 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 12:38:01,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-12-02 12:38:01,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2024-12-02 12:38:01,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 150 states have (on average 1.1333333333333333) internal successors, (170), 145 states have internal predecessors, (170), 42 states have call successors, (42), 26 states have call predecessors, (42), 25 states have return successors, (138), 46 states have call predecessors, (138), 42 states have call successors, (138) [2024-12-02 12:38:01,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 350 transitions. [2024-12-02 12:38:01,108 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 350 transitions. Word has length 1371 [2024-12-02 12:38:01,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:38:01,108 INFO L471 AbstractCegarLoop]: Abstraction has 218 states and 350 transitions. [2024-12-02 12:38:01,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 22 states have internal predecessors, (87), 15 states have call successors, (25), 2 states have call predecessors, (25), 8 states have return successors, (29), 8 states have call predecessors, (29), 15 states have call successors, (29) [2024-12-02 12:38:01,109 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 350 transitions. [2024-12-02 12:38:01,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1415 [2024-12-02 12:38:01,127 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:38:01,127 INFO L218 NwaCegarLoop]: trace histogram [105, 105, 102, 102, 85, 83, 52, 52, 52, 52, 52, 52, 52, 51, 51, 51, 51, 51, 51, 51, 34, 31, 20, 19, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:38:01,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-12-02 12:38:01,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-12-02 12:38:01,328 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:38:01,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:38:01,328 INFO L85 PathProgramCache]: Analyzing trace with hash 499936055, now seen corresponding path program 11 times [2024-12-02 12:38:01,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:38:01,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980665516] [2024-12-02 12:38:01,328 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 12:38:01,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:38:01,377 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2024-12-02 12:38:01,377 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:38:01,738 INFO L134 CoverageAnalysis]: Checked inductivity of 59821 backedges. 1404 proven. 4050 refuted. 0 times theorem prover too weak. 54367 trivial. 0 not checked. [2024-12-02 12:38:01,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:38:01,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980665516] [2024-12-02 12:38:01,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980665516] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:38:01,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706813888] [2024-12-02 12:38:01,739 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 12:38:01,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:38:01,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:38:01,741 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:38:01,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-12-02 12:38:02,059 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2024-12-02 12:38:02,059 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:38:02,061 INFO L256 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-12-02 12:38:02,075 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:38:02,179 INFO L134 CoverageAnalysis]: Checked inductivity of 59821 backedges. 22144 proven. 176 refuted. 0 times theorem prover too weak. 37501 trivial. 0 not checked. [2024-12-02 12:38:02,180 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:38:06,861 INFO L134 CoverageAnalysis]: Checked inductivity of 59821 backedges. 1441 proven. 4381 refuted. 0 times theorem prover too weak. 53999 trivial. 0 not checked. [2024-12-02 12:38:06,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706813888] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:38:06,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:38:06,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 19] total 27 [2024-12-02 12:38:06,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83468154] [2024-12-02 12:38:06,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:38:06,863 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-12-02 12:38:06,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:38:06,864 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-12-02 12:38:06,864 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2024-12-02 12:38:06,864 INFO L87 Difference]: Start difference. First operand 218 states and 350 transitions. Second operand has 27 states, 27 states have (on average 3.814814814814815) internal successors, (103), 27 states have internal predecessors, (103), 20 states have call successors, (30), 2 states have call predecessors, (30), 10 states have return successors, (36), 10 states have call predecessors, (36), 20 states have call successors, (36) [2024-12-02 12:38:07,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:38:07,308 INFO L93 Difference]: Finished difference Result 444 states and 812 transitions. [2024-12-02 12:38:07,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-12-02 12:38:07,309 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.814814814814815) internal successors, (103), 27 states have internal predecessors, (103), 20 states have call successors, (30), 2 states have call predecessors, (30), 10 states have return successors, (36), 10 states have call predecessors, (36), 20 states have call successors, (36) Word has length 1414 [2024-12-02 12:38:07,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:38:07,312 INFO L225 Difference]: With dead ends: 444 [2024-12-02 12:38:07,312 INFO L226 Difference]: Without dead ends: 220 [2024-12-02 12:38:07,314 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2861 GetRequests, 2811 SyntacticMatches, 9 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=305, Invalid=1501, Unknown=0, NotChecked=0, Total=1806 [2024-12-02 12:38:07,314 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 58 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 12:38:07,314 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 454 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 12:38:07,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2024-12-02 12:38:07,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 214. [2024-12-02 12:38:07,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 148 states have (on average 1.1216216216216217) internal successors, (166), 144 states have internal predecessors, (166), 41 states have call successors, (41), 27 states have call predecessors, (41), 24 states have return successors, (123), 42 states have call predecessors, (123), 41 states have call successors, (123) [2024-12-02 12:38:07,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 330 transitions. [2024-12-02 12:38:07,339 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 330 transitions. Word has length 1414 [2024-12-02 12:38:07,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:38:07,340 INFO L471 AbstractCegarLoop]: Abstraction has 214 states and 330 transitions. [2024-12-02 12:38:07,340 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.814814814814815) internal successors, (103), 27 states have internal predecessors, (103), 20 states have call successors, (30), 2 states have call predecessors, (30), 10 states have return successors, (36), 10 states have call predecessors, (36), 20 states have call successors, (36) [2024-12-02 12:38:07,340 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 330 transitions. [2024-12-02 12:38:07,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2612 [2024-12-02 12:38:07,386 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:38:07,387 INFO L218 NwaCegarLoop]: trace histogram [193, 193, 190, 190, 156, 153, 96, 96, 96, 96, 96, 96, 96, 95, 95, 95, 95, 95, 95, 95, 60, 58, 40, 34, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:38:07,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-12-02 12:38:07,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:38:07,587 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:38:07,588 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:38:07,589 INFO L85 PathProgramCache]: Analyzing trace with hash -760729943, now seen corresponding path program 12 times [2024-12-02 12:38:07,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:38:07,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609709287] [2024-12-02 12:38:07,589 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 12:38:07,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:38:07,708 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2024-12-02 12:38:07,708 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:38:08,230 INFO L134 CoverageAnalysis]: Checked inductivity of 205750 backedges. 1686 proven. 8772 refuted. 0 times theorem prover too weak. 195292 trivial. 0 not checked. [2024-12-02 12:38:08,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:38:08,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609709287] [2024-12-02 12:38:08,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609709287] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:38:08,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792757867] [2024-12-02 12:38:08,230 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 12:38:08,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:38:08,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:38:08,232 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:38:08,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-12-02 12:38:08,721 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2024-12-02 12:38:08,721 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:38:08,725 INFO L256 TraceCheckSpWp]: Trace formula consists of 1036 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-12-02 12:38:08,740 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:38:08,883 INFO L134 CoverageAnalysis]: Checked inductivity of 205750 backedges. 1678 proven. 8772 refuted. 0 times theorem prover too weak. 195300 trivial. 0 not checked. [2024-12-02 12:38:08,883 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:38:17,919 INFO L134 CoverageAnalysis]: Checked inductivity of 205750 backedges. 1682 proven. 8824 refuted. 0 times theorem prover too weak. 195244 trivial. 0 not checked. [2024-12-02 12:38:17,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792757867] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:38:17,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:38:17,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 23] total 27 [2024-12-02 12:38:17,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646678164] [2024-12-02 12:38:17,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:38:17,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-12-02 12:38:17,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:38:17,922 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-12-02 12:38:17,922 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2024-12-02 12:38:17,922 INFO L87 Difference]: Start difference. First operand 214 states and 330 transitions. Second operand has 27 states, 25 states have (on average 3.64) internal successors, (91), 27 states have internal predecessors, (91), 22 states have call successors, (27), 1 states have call predecessors, (27), 11 states have return successors, (34), 13 states have call predecessors, (34), 22 states have call successors, (34) [2024-12-02 12:38:18,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:38:18,245 INFO L93 Difference]: Finished difference Result 305 states and 598 transitions. [2024-12-02 12:38:18,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-12-02 12:38:18,245 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 3.64) internal successors, (91), 27 states have internal predecessors, (91), 22 states have call successors, (27), 1 states have call predecessors, (27), 11 states have return successors, (34), 13 states have call predecessors, (34), 22 states have call successors, (34) Word has length 2611 [2024-12-02 12:38:18,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:38:18,252 INFO L225 Difference]: With dead ends: 305 [2024-12-02 12:38:18,252 INFO L226 Difference]: Without dead ends: 299 [2024-12-02 12:38:18,253 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5252 GetRequests, 5208 SyntacticMatches, 10 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2024-12-02 12:38:18,253 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 99 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 12:38:18,253 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 244 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 12:38:18,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2024-12-02 12:38:18,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 271. [2024-12-02 12:38:18,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 184 states have (on average 1.0978260869565217) internal successors, (202), 180 states have internal predecessors, (202), 53 states have call successors, (53), 30 states have call predecessors, (53), 33 states have return successors, (245), 60 states have call predecessors, (245), 53 states have call successors, (245) [2024-12-02 12:38:18,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 500 transitions. [2024-12-02 12:38:18,282 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 500 transitions. Word has length 2611 [2024-12-02 12:38:18,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:38:18,283 INFO L471 AbstractCegarLoop]: Abstraction has 271 states and 500 transitions. [2024-12-02 12:38:18,284 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 3.64) internal successors, (91), 27 states have internal predecessors, (91), 22 states have call successors, (27), 1 states have call predecessors, (27), 11 states have return successors, (34), 13 states have call predecessors, (34), 22 states have call successors, (34) [2024-12-02 12:38:18,284 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 500 transitions. [2024-12-02 12:38:18,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1905 [2024-12-02 12:38:18,303 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:38:18,303 INFO L218 NwaCegarLoop]: trace histogram [142, 142, 137, 137, 116, 110, 71, 71, 71, 71, 71, 71, 71, 68, 68, 68, 68, 68, 68, 68, 48, 39, 27, 26, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:38:18,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-12-02 12:38:18,503 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:38:18,503 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:38:18,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:38:18,504 INFO L85 PathProgramCache]: Analyzing trace with hash -733907175, now seen corresponding path program 13 times [2024-12-02 12:38:18,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:38:18,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98447425] [2024-12-02 12:38:18,505 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 12:38:18,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:38:19,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:38:22,298 INFO L134 CoverageAnalysis]: Checked inductivity of 109025 backedges. 1024 proven. 5749 refuted. 0 times theorem prover too weak. 102252 trivial. 0 not checked. [2024-12-02 12:38:22,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:38:22,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98447425] [2024-12-02 12:38:22,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98447425] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:38:22,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321254433] [2024-12-02 12:38:22,298 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 12:38:22,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:38:22,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:38:22,300 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:38:22,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-12-02 12:38:22,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:38:22,945 INFO L256 TraceCheckSpWp]: Trace formula consists of 4247 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-12-02 12:38:22,956 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:38:23,130 INFO L134 CoverageAnalysis]: Checked inductivity of 109025 backedges. 898 proven. 7384 refuted. 0 times theorem prover too weak. 100743 trivial. 0 not checked. [2024-12-02 12:38:23,130 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:38:31,766 INFO L134 CoverageAnalysis]: Checked inductivity of 109025 backedges. 898 proven. 7454 refuted. 0 times theorem prover too weak. 100673 trivial. 0 not checked. [2024-12-02 12:38:31,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321254433] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:38:31,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:38:31,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 25] total 34 [2024-12-02 12:38:31,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891742388] [2024-12-02 12:38:31,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:38:31,769 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-12-02 12:38:31,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:38:31,769 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-12-02 12:38:31,770 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2024-12-02 12:38:31,770 INFO L87 Difference]: Start difference. First operand 271 states and 500 transitions. Second operand has 34 states, 32 states have (on average 3.46875) internal successors, (111), 34 states have internal predecessors, (111), 30 states have call successors, (34), 1 states have call predecessors, (34), 18 states have return successors, (49), 19 states have call predecessors, (49), 30 states have call successors, (49) [2024-12-02 12:38:32,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:38:32,264 INFO L93 Difference]: Finished difference Result 357 states and 861 transitions. [2024-12-02 12:38:32,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-12-02 12:38:32,264 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 3.46875) internal successors, (111), 34 states have internal predecessors, (111), 30 states have call successors, (34), 1 states have call predecessors, (34), 18 states have return successors, (49), 19 states have call predecessors, (49), 30 states have call successors, (49) Word has length 1904 [2024-12-02 12:38:32,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:38:32,270 INFO L225 Difference]: With dead ends: 357 [2024-12-02 12:38:32,270 INFO L226 Difference]: Without dead ends: 349 [2024-12-02 12:38:32,271 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3843 GetRequests, 3784 SyntacticMatches, 11 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=453, Invalid=1997, Unknown=0, NotChecked=0, Total=2450 [2024-12-02 12:38:32,272 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 169 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 12:38:32,272 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 255 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 12:38:32,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2024-12-02 12:38:32,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 295. [2024-12-02 12:38:32,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 198 states have (on average 1.0909090909090908) internal successors, (216), 194 states have internal predecessors, (216), 59 states have call successors, (59), 30 states have call predecessors, (59), 37 states have return successors, (338), 70 states have call predecessors, (338), 59 states have call successors, (338) [2024-12-02 12:38:32,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 613 transitions. [2024-12-02 12:38:32,319 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 613 transitions. Word has length 1904 [2024-12-02 12:38:32,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:38:32,319 INFO L471 AbstractCegarLoop]: Abstraction has 295 states and 613 transitions. [2024-12-02 12:38:32,319 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 3.46875) internal successors, (111), 34 states have internal predecessors, (111), 30 states have call successors, (34), 1 states have call predecessors, (34), 18 states have return successors, (49), 19 states have call predecessors, (49), 30 states have call successors, (49) [2024-12-02 12:38:32,320 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 613 transitions. [2024-12-02 12:38:32,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4874 [2024-12-02 12:38:32,413 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:38:32,414 INFO L218 NwaCegarLoop]: trace histogram [358, 358, 357, 357, 294, 285, 179, 179, 179, 179, 179, 179, 179, 178, 178, 178, 178, 178, 178, 178, 116, 106, 72, 64, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:38:32,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-12-02 12:38:32,614 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:38:32,614 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:38:32,615 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:38:32,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1469030663, now seen corresponding path program 14 times [2024-12-02 12:38:32,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:38:32,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114743131] [2024-12-02 12:38:32,616 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 12:38:32,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:38:34,575 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 12:38:34,575 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:38:57,707 INFO L134 CoverageAnalysis]: Checked inductivity of 720073 backedges. 8232 proven. 13550 refuted. 0 times theorem prover too weak. 698291 trivial. 0 not checked. [2024-12-02 12:38:57,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:38:57,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114743131] [2024-12-02 12:38:57,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114743131] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:38:57,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953705027] [2024-12-02 12:38:57,708 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 12:38:57,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:38:57,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:38:57,709 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:38:57,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-12-02 12:38:59,046 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 12:38:59,046 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:38:59,078 INFO L256 TraceCheckSpWp]: Trace formula consists of 10839 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-12-02 12:38:59,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:38:59,329 INFO L134 CoverageAnalysis]: Checked inductivity of 720073 backedges. 3024 proven. 22778 refuted. 0 times theorem prover too weak. 694271 trivial. 0 not checked. [2024-12-02 12:38:59,329 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:39:18,514 INFO L134 CoverageAnalysis]: Checked inductivity of 720073 backedges. 3024 proven. 22880 refuted. 0 times theorem prover too weak. 694169 trivial. 0 not checked. [2024-12-02 12:39:18,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953705027] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:39:18,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:39:18,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 29] total 35 [2024-12-02 12:39:18,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48653798] [2024-12-02 12:39:18,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:39:18,518 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-12-02 12:39:18,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:39:18,518 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-12-02 12:39:18,518 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=999, Unknown=0, NotChecked=0, Total=1190 [2024-12-02 12:39:18,519 INFO L87 Difference]: Start difference. First operand 295 states and 613 transitions. Second operand has 35 states, 33 states have (on average 3.4545454545454546) internal successors, (114), 35 states have internal predecessors, (114), 31 states have call successors, (35), 1 states have call predecessors, (35), 17 states have return successors, (49), 18 states have call predecessors, (49), 31 states have call successors, (49) [2024-12-02 12:39:19,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:39:19,020 INFO L93 Difference]: Finished difference Result 424 states and 1292 transitions. [2024-12-02 12:39:19,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-12-02 12:39:19,021 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 3.4545454545454546) internal successors, (114), 35 states have internal predecessors, (114), 31 states have call successors, (35), 1 states have call predecessors, (35), 17 states have return successors, (49), 18 states have call predecessors, (49), 31 states have call successors, (49) Word has length 4873 [2024-12-02 12:39:19,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:39:19,035 INFO L225 Difference]: With dead ends: 424 [2024-12-02 12:39:19,035 INFO L226 Difference]: Without dead ends: 416 [2024-12-02 12:39:19,037 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9784 GetRequests, 9723 SyntacticMatches, 13 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=447, Invalid=2003, Unknown=0, NotChecked=0, Total=2450 [2024-12-02 12:39:19,038 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 135 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 12:39:19,038 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 304 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 12:39:19,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2024-12-02 12:39:19,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 319. [2024-12-02 12:39:19,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 213 states have (on average 1.0845070422535212) internal successors, (231), 209 states have internal predecessors, (231), 62 states have call successors, (62), 30 states have call predecessors, (62), 43 states have return successors, (435), 79 states have call predecessors, (435), 62 states have call successors, (435) [2024-12-02 12:39:19,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 728 transitions. [2024-12-02 12:39:19,103 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 728 transitions. Word has length 4873 [2024-12-02 12:39:19,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:39:19,106 INFO L471 AbstractCegarLoop]: Abstraction has 319 states and 728 transitions. [2024-12-02 12:39:19,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 3.4545454545454546) internal successors, (114), 35 states have internal predecessors, (114), 31 states have call successors, (35), 1 states have call predecessors, (35), 17 states have return successors, (49), 18 states have call predecessors, (49), 31 states have call successors, (49) [2024-12-02 12:39:19,106 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 728 transitions. [2024-12-02 12:39:19,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9858 [2024-12-02 12:39:19,616 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:39:19,617 INFO L218 NwaCegarLoop]: trace histogram [735, 735, 712, 712, 591, 580, 367, 367, 367, 367, 367, 367, 367, 356, 356, 356, 356, 356, 356, 356, 235, 213, 144, 132, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:39:19,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-12-02 12:39:19,818 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:39:19,818 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:39:19,819 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:39:19,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1739664499, now seen corresponding path program 15 times [2024-12-02 12:39:19,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:39:19,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081785755] [2024-12-02 12:39:19,820 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 12:39:19,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:39:19,987 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2024-12-02 12:39:19,987 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:39:20,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2955103 backedges. 33578 proven. 169 refuted. 0 times theorem prover too weak. 2921356 trivial. 0 not checked. [2024-12-02 12:39:20,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:39:20,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081785755] [2024-12-02 12:39:20,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081785755] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:39:20,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896937838] [2024-12-02 12:39:20,395 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 12:39:20,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:39:20,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:39:20,397 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:39:20,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-12-02 12:39:21,374 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2024-12-02 12:39:21,375 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:39:21,383 INFO L256 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-12-02 12:39:21,429 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:39:21,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2955103 backedges. 34159 proven. 173 refuted. 0 times theorem prover too weak. 2920771 trivial. 0 not checked. [2024-12-02 12:39:21,713 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:39:50,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2955103 backedges. 34159 proven. 181 refuted. 0 times theorem prover too weak. 2920763 trivial. 0 not checked. [2024-12-02 12:39:50,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896937838] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:39:50,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:39:50,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 17] total 25 [2024-12-02 12:39:50,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888512536] [2024-12-02 12:39:50,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:39:50,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-12-02 12:39:50,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:39:50,650 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-12-02 12:39:50,650 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2024-12-02 12:39:50,650 INFO L87 Difference]: Start difference. First operand 319 states and 728 transitions. Second operand has 25 states, 25 states have (on average 3.52) internal successors, (88), 25 states have internal predecessors, (88), 13 states have call successors, (25), 1 states have call predecessors, (25), 11 states have return successors, (31), 18 states have call predecessors, (31), 13 states have call successors, (31) [2024-12-02 12:39:51,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:39:51,084 INFO L93 Difference]: Finished difference Result 708 states and 2008 transitions. [2024-12-02 12:39:51,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-12-02 12:39:51,085 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.52) internal successors, (88), 25 states have internal predecessors, (88), 13 states have call successors, (25), 1 states have call predecessors, (25), 11 states have return successors, (31), 18 states have call predecessors, (31), 13 states have call successors, (31) Word has length 9857 [2024-12-02 12:39:51,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:39:51,091 INFO L225 Difference]: With dead ends: 708 [2024-12-02 12:39:51,091 INFO L226 Difference]: Without dead ends: 387 [2024-12-02 12:39:51,094 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 19743 GetRequests, 19700 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=1243, Unknown=0, NotChecked=0, Total=1482 [2024-12-02 12:39:51,094 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 74 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 12:39:51,094 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 364 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 12:39:51,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2024-12-02 12:39:51,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 360. [2024-12-02 12:39:51,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 239 states have (on average 1.0753138075313808) internal successors, (257), 237 states have internal predecessors, (257), 74 states have call successors, (74), 35 states have call predecessors, (74), 46 states have return successors, (502), 87 states have call predecessors, (502), 74 states have call successors, (502) [2024-12-02 12:39:51,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 833 transitions. [2024-12-02 12:39:51,131 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 833 transitions. Word has length 9857 [2024-12-02 12:39:51,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:39:51,132 INFO L471 AbstractCegarLoop]: Abstraction has 360 states and 833 transitions. [2024-12-02 12:39:51,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.52) internal successors, (88), 25 states have internal predecessors, (88), 13 states have call successors, (25), 1 states have call predecessors, (25), 11 states have return successors, (31), 18 states have call predecessors, (31), 13 states have call successors, (31) [2024-12-02 12:39:51,132 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 833 transitions. [2024-12-02 12:39:52,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14270 [2024-12-02 12:39:52,076 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:39:52,078 INFO L218 NwaCegarLoop]: trace histogram [1052, 1052, 1043, 1043, 849, 846, 526, 526, 526, 526, 526, 526, 526, 521, 521, 521, 521, 521, 521, 521, 325, 323, 206, 194, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:39:52,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-12-02 12:39:52,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:39:52,278 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:39:52,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:39:52,280 INFO L85 PathProgramCache]: Analyzing trace with hash 566991109, now seen corresponding path program 16 times [2024-12-02 12:39:52,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:39:52,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747589590] [2024-12-02 12:39:52,281 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 12:39:52,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:40:01,143 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 12:40:01,144 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:42:30,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6196467 backedges. 9073 proven. 86851 refuted. 0 times theorem prover too weak. 6100543 trivial. 0 not checked. [2024-12-02 12:42:30,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:42:30,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747589590] [2024-12-02 12:42:30,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747589590] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:42:30,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732036196] [2024-12-02 12:42:30,355 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 12:42:30,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:42:30,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:42:30,357 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:42:30,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-12-02 12:42:33,524 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 12:42:33,524 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:42:33,608 INFO L256 TraceCheckSpWp]: Trace formula consists of 25392 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-12-02 12:42:33,693 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:42:34,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6196467 backedges. 680819 proven. 3264 refuted. 0 times theorem prover too weak. 5512384 trivial. 0 not checked. [2024-12-02 12:42:34,122 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:43:22,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6196467 backedges. 9266 proven. 98713 refuted. 0 times theorem prover too weak. 6088488 trivial. 0 not checked. [2024-12-02 12:43:22,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732036196] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:43:22,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:43:22,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 31] total 39 [2024-12-02 12:43:22,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303216291] [2024-12-02 12:43:22,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:43:22,660 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-12-02 12:43:22,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:43:22,660 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-12-02 12:43:22,661 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2024-12-02 12:43:22,661 INFO L87 Difference]: Start difference. First operand 360 states and 833 transitions. Second operand has 39 states, 39 states have (on average 3.6153846153846154) internal successors, (141), 39 states have internal predecessors, (141), 33 states have call successors, (45), 2 states have call predecessors, (45), 17 states have return successors, (57), 19 states have call predecessors, (57), 33 states have call successors, (57) [2024-12-02 12:43:23,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:43:23,764 INFO L93 Difference]: Finished difference Result 756 states and 2276 transitions. [2024-12-02 12:43:23,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-12-02 12:43:23,765 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.6153846153846154) internal successors, (141), 39 states have internal predecessors, (141), 33 states have call successors, (45), 2 states have call predecessors, (45), 17 states have return successors, (57), 19 states have call predecessors, (57), 33 states have call successors, (57) Word has length 14269 [2024-12-02 12:43:23,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:43:23,770 INFO L225 Difference]: With dead ends: 756 [2024-12-02 12:43:23,770 INFO L226 Difference]: Without dead ends: 383 [2024-12-02 12:43:23,774 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28606 GetRequests, 28513 SyntacticMatches, 15 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1566 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=933, Invalid=5387, Unknown=0, NotChecked=0, Total=6320 [2024-12-02 12:43:23,774 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 174 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 1313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-12-02 12:43:23,775 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 631 Invalid, 1313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 1137 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-12-02 12:43:23,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2024-12-02 12:43:23,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 332. [2024-12-02 12:43:23,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 223 states have (on average 1.0582959641255605) internal successors, (236), 220 states have internal predecessors, (236), 67 states have call successors, (67), 35 states have call predecessors, (67), 41 states have return successors, (444), 76 states have call predecessors, (444), 67 states have call successors, (444) [2024-12-02 12:43:23,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 747 transitions. [2024-12-02 12:43:23,806 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 747 transitions. Word has length 14269 [2024-12-02 12:43:23,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:43:23,807 INFO L471 AbstractCegarLoop]: Abstraction has 332 states and 747 transitions. [2024-12-02 12:43:23,807 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.6153846153846154) internal successors, (141), 39 states have internal predecessors, (141), 33 states have call successors, (45), 2 states have call predecessors, (45), 17 states have return successors, (57), 19 states have call predecessors, (57), 33 states have call successors, (57) [2024-12-02 12:43:23,808 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 747 transitions. [2024-12-02 12:43:24,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13452 [2024-12-02 12:43:24,590 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:43:24,591 INFO L218 NwaCegarLoop]: trace histogram [1002, 1002, 973, 973, 802, 795, 501, 501, 501, 501, 501, 501, 501, 486, 486, 486, 486, 486, 486, 486, 316, 294, 200, 178, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:43:24,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-12-02 12:43:24,791 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-12-02 12:43:24,792 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:43:24,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:43:24,796 INFO L85 PathProgramCache]: Analyzing trace with hash -234928383, now seen corresponding path program 17 times [2024-12-02 12:43:24,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:43:24,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487588106] [2024-12-02 12:43:24,796 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 12:43:24,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:43:25,042 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2024-12-02 12:43:25,042 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:43:25,976 INFO L134 CoverageAnalysis]: Checked inductivity of 5506752 backedges. 13316 proven. 64902 refuted. 0 times theorem prover too weak. 5428534 trivial. 0 not checked. [2024-12-02 12:43:25,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:43:25,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487588106] [2024-12-02 12:43:25,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487588106] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:43:25,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967605131] [2024-12-02 12:43:25,977 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 12:43:25,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:43:25,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:43:25,978 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:43:25,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-12-02 12:43:27,362 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2024-12-02 12:43:27,362 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:43:27,374 INFO L256 TraceCheckSpWp]: Trace formula consists of 1479 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-12-02 12:43:27,445 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:43:27,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5506752 backedges. 1074375 proven. 362 refuted. 0 times theorem prover too weak. 4432015 trivial. 0 not checked. [2024-12-02 12:43:27,801 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:44:10,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5506752 backedges. 13146 proven. 63167 refuted. 0 times theorem prover too weak. 5430439 trivial. 0 not checked. [2024-12-02 12:44:10,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967605131] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:44:10,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:44:10,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 21] total 30 [2024-12-02 12:44:10,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354072171] [2024-12-02 12:44:10,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:44:10,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-12-02 12:44:10,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:44:10,312 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-12-02 12:44:10,312 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2024-12-02 12:44:10,313 INFO L87 Difference]: Start difference. First operand 332 states and 747 transitions. Second operand has 30 states, 30 states have (on average 3.7666666666666666) internal successors, (113), 30 states have internal predecessors, (113), 22 states have call successors, (34), 2 states have call predecessors, (34), 12 states have return successors, (43), 14 states have call predecessors, (43), 22 states have call successors, (43) [2024-12-02 12:44:10,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:44:10,811 INFO L93 Difference]: Finished difference Result 630 states and 1611 transitions. [2024-12-02 12:44:10,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-12-02 12:44:10,812 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.7666666666666666) internal successors, (113), 30 states have internal predecessors, (113), 22 states have call successors, (34), 2 states have call predecessors, (34), 12 states have return successors, (43), 14 states have call predecessors, (43), 22 states have call successors, (43) Word has length 13451 [2024-12-02 12:44:10,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:44:10,816 INFO L225 Difference]: With dead ends: 630 [2024-12-02 12:44:10,817 INFO L226 Difference]: Without dead ends: 308 [2024-12-02 12:44:10,819 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 26940 GetRequests, 26885 SyntacticMatches, 10 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=362, Invalid=1800, Unknown=0, NotChecked=0, Total=2162 [2024-12-02 12:44:10,819 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 84 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 12:44:10,820 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 471 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 12:44:10,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2024-12-02 12:44:10,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 261. [2024-12-02 12:44:10,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 175 states have (on average 1.0514285714285714) internal successors, (184), 173 states have internal predecessors, (184), 51 states have call successors, (51), 26 states have call predecessors, (51), 34 states have return successors, (295), 61 states have call predecessors, (295), 51 states have call successors, (295) [2024-12-02 12:44:10,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 530 transitions. [2024-12-02 12:44:10,845 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 530 transitions. Word has length 13451 [2024-12-02 12:44:10,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:44:10,846 INFO L471 AbstractCegarLoop]: Abstraction has 261 states and 530 transitions. [2024-12-02 12:44:10,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.7666666666666666) internal successors, (113), 30 states have internal predecessors, (113), 22 states have call successors, (34), 2 states have call predecessors, (34), 12 states have return successors, (43), 14 states have call predecessors, (43), 22 states have call successors, (43) [2024-12-02 12:44:10,846 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 530 transitions. [2024-12-02 12:44:11,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6794 [2024-12-02 12:44:11,188 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:44:11,189 INFO L218 NwaCegarLoop]: trace histogram [501, 501, 496, 496, 406, 401, 250, 250, 250, 250, 250, 250, 250, 248, 248, 248, 248, 248, 248, 248, 156, 153, 100, 90, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:44:11,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-12-02 12:44:11,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:44:11,389 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:44:11,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:44:11,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1490573652, now seen corresponding path program 18 times [2024-12-02 12:44:11,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:44:11,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761844004] [2024-12-02 12:44:11,392 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 12:44:11,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:44:11,549 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2024-12-02 12:44:11,549 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:44:12,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1401467 backedges. 5307 proven. 29198 refuted. 0 times theorem prover too weak. 1366962 trivial. 0 not checked. [2024-12-02 12:44:12,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:44:12,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761844004] [2024-12-02 12:44:12,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761844004] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:44:12,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199479481] [2024-12-02 12:44:12,980 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 12:44:12,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:44:12,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:44:12,982 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:44:12,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-12-02 12:44:13,996 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2024-12-02 12:44:13,996 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:44:14,004 INFO L256 TraceCheckSpWp]: Trace formula consists of 1346 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-12-02 12:44:14,036 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:44:14,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1401467 backedges. 5159 proven. 28184 refuted. 0 times theorem prover too weak. 1368124 trivial. 0 not checked. [2024-12-02 12:44:14,345 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:44:37,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1401467 backedges. 5165 proven. 28263 refuted. 0 times theorem prover too weak. 1368039 trivial. 0 not checked. [2024-12-02 12:44:37,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199479481] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:44:37,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:44:37,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17, 27] total 38 [2024-12-02 12:44:37,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912184452] [2024-12-02 12:44:37,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:44:37,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-12-02 12:44:37,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:44:37,323 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-12-02 12:44:37,323 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1166, Unknown=0, NotChecked=0, Total=1406 [2024-12-02 12:44:37,324 INFO L87 Difference]: Start difference. First operand 261 states and 530 transitions. Second operand has 38 states, 35 states have (on average 3.257142857142857) internal successors, (114), 38 states have internal predecessors, (114), 31 states have call successors, (36), 1 states have call predecessors, (36), 15 states have return successors, (47), 19 states have call predecessors, (47), 31 states have call successors, (47) [2024-12-02 12:44:38,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:44:38,115 INFO L93 Difference]: Finished difference Result 687 states and 2054 transitions. [2024-12-02 12:44:38,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-12-02 12:44:38,115 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 35 states have (on average 3.257142857142857) internal successors, (114), 38 states have internal predecessors, (114), 31 states have call successors, (36), 1 states have call predecessors, (36), 15 states have return successors, (47), 19 states have call predecessors, (47), 31 states have call successors, (47) Word has length 6793 [2024-12-02 12:44:38,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:44:38,125 INFO L225 Difference]: With dead ends: 687 [2024-12-02 12:44:38,125 INFO L226 Difference]: Without dead ends: 411 [2024-12-02 12:44:38,129 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13640 GetRequests, 13569 SyntacticMatches, 12 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=688, Invalid=2972, Unknown=0, NotChecked=0, Total=3660 [2024-12-02 12:44:38,129 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 180 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-12-02 12:44:38,129 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 446 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-12-02 12:44:38,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2024-12-02 12:44:38,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 375. [2024-12-02 12:44:38,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 254 states have (on average 1.0590551181102361) internal successors, (269), 251 states have internal predecessors, (269), 77 states have call successors, (77), 43 states have call predecessors, (77), 43 states have return successors, (533), 80 states have call predecessors, (533), 77 states have call successors, (533) [2024-12-02 12:44:38,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 879 transitions. [2024-12-02 12:44:38,197 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 879 transitions. Word has length 6793 [2024-12-02 12:44:38,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:44:38,200 INFO L471 AbstractCegarLoop]: Abstraction has 375 states and 879 transitions. [2024-12-02 12:44:38,200 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 35 states have (on average 3.257142857142857) internal successors, (114), 38 states have internal predecessors, (114), 31 states have call successors, (36), 1 states have call predecessors, (36), 15 states have return successors, (47), 19 states have call predecessors, (47), 31 states have call successors, (47) [2024-12-02 12:44:38,200 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 879 transitions. [2024-12-02 12:44:38,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8782 [2024-12-02 12:44:38,562 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:44:38,563 INFO L218 NwaCegarLoop]: trace histogram [651, 651, 638, 638, 528, 515, 325, 325, 325, 325, 325, 325, 325, 319, 319, 319, 319, 319, 319, 319, 209, 190, 123, 123, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:44:38,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-12-02 12:44:38,763 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:44:38,763 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:44:38,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:44:38,765 INFO L85 PathProgramCache]: Analyzing trace with hash 548747924, now seen corresponding path program 19 times [2024-12-02 12:44:38,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:44:38,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261228216] [2024-12-02 12:44:38,765 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 12:44:38,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:44:43,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:46:03,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2344079 backedges. 13632 proven. 43676 refuted. 0 times theorem prover too weak. 2286771 trivial. 0 not checked. [2024-12-02 12:46:03,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:46:03,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261228216] [2024-12-02 12:46:03,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261228216] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:46:03,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595820542] [2024-12-02 12:46:03,832 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 12:46:03,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:46:03,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:46:03,834 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:46:03,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-12-02 12:46:06,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:46:06,626 INFO L256 TraceCheckSpWp]: Trace formula consists of 19516 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-12-02 12:46:06,672 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:46:07,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2344079 backedges. 5054 proven. 45508 refuted. 0 times theorem prover too weak. 2293517 trivial. 0 not checked. [2024-12-02 12:46:07,101 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:46:40,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2344079 backedges. 5054 proven. 45628 refuted. 0 times theorem prover too weak. 2293397 trivial. 0 not checked. [2024-12-02 12:46:40,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595820542] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:46:40,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:46:40,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19, 31] total 50 [2024-12-02 12:46:40,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798459475] [2024-12-02 12:46:40,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:46:40,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-12-02 12:46:40,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:46:40,072 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-12-02 12:46:40,072 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=2193, Unknown=0, NotChecked=0, Total=2450 [2024-12-02 12:46:40,072 INFO L87 Difference]: Start difference. First operand 375 states and 879 transitions. Second operand has 50 states, 48 states have (on average 3.2708333333333335) internal successors, (157), 50 states have internal predecessors, (157), 42 states have call successors, (50), 1 states have call predecessors, (50), 26 states have return successors, (71), 28 states have call predecessors, (71), 42 states have call successors, (71) [2024-12-02 12:46:42,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:46:42,276 INFO L93 Difference]: Finished difference Result 1039 states and 3543 transitions. [2024-12-02 12:46:42,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2024-12-02 12:46:42,277 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 48 states have (on average 3.2708333333333335) internal successors, (157), 50 states have internal predecessors, (157), 42 states have call successors, (50), 1 states have call predecessors, (50), 26 states have return successors, (71), 28 states have call predecessors, (71), 42 states have call successors, (71) Word has length 8781 [2024-12-02 12:46:42,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:46:42,286 INFO L225 Difference]: With dead ends: 1039 [2024-12-02 12:46:42,286 INFO L226 Difference]: Without dead ends: 643 [2024-12-02 12:46:42,294 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17663 GetRequests, 17531 SyntacticMatches, 14 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4228 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1779, Invalid=12501, Unknown=0, NotChecked=0, Total=14280 [2024-12-02 12:46:42,294 INFO L435 NwaCegarLoop]: 65 mSDtfsCounter, 342 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 2173 mSolverCounterSat, 386 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 1088 SdHoareTripleChecker+Invalid, 2559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 386 IncrementalHoareTripleChecker+Valid, 2173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-12-02 12:46:42,294 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 1088 Invalid, 2559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [386 Valid, 2173 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-12-02 12:46:42,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2024-12-02 12:46:42,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 489. [2024-12-02 12:46:42,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 337 states have (on average 1.0474777448071217) internal successors, (353), 333 states have internal predecessors, (353), 105 states have call successors, (105), 67 states have call predecessors, (105), 46 states have return successors, (581), 88 states have call predecessors, (581), 105 states have call successors, (581) [2024-12-02 12:46:42,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1039 transitions. [2024-12-02 12:46:42,379 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1039 transitions. Word has length 8781 [2024-12-02 12:46:42,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:46:42,379 INFO L471 AbstractCegarLoop]: Abstraction has 489 states and 1039 transitions. [2024-12-02 12:46:42,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 48 states have (on average 3.2708333333333335) internal successors, (157), 50 states have internal predecessors, (157), 42 states have call successors, (50), 1 states have call predecessors, (50), 26 states have return successors, (71), 28 states have call predecessors, (71), 42 states have call successors, (71) [2024-12-02 12:46:42,380 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1039 transitions. [2024-12-02 12:46:44,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20031 [2024-12-02 12:46:44,570 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:46:44,572 INFO L218 NwaCegarLoop]: trace histogram [1481, 1481, 1460, 1460, 1191, 1189, 740, 740, 740, 740, 740, 740, 740, 730, 730, 730, 730, 730, 730, 730, 461, 449, 290, 271, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:46:44,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-12-02 12:46:44,772 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3dfd15f-881a-421c-8d48-2d0e4eaee1f3/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-12-02 12:46:44,772 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 12:46:44,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:46:44,777 INFO L85 PathProgramCache]: Analyzing trace with hash 172109142, now seen corresponding path program 20 times [2024-12-02 12:46:44,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:46:44,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668037629] [2024-12-02 12:46:44,777 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 12:46:44,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:47:10,520 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 12:47:10,520 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat