./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound50.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_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 63cd3e528fa28694be9f2ecbe948122395c3f48db5408253e949dc50f2a74038 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 20:07:01,602 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 20:07:01,708 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-27 20:07:01,717 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 20:07:01,718 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 20:07:01,762 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 20:07:01,763 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 20:07:01,763 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 20:07:01,764 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 20:07:01,764 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 20:07:01,764 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 20:07:01,764 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 20:07:01,765 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 20:07:01,765 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 20:07:01,765 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 20:07:01,765 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 20:07:01,766 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 20:07:01,766 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 20:07:01,766 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 20:07:01,766 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 20:07:01,766 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 20:07:01,767 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 20:07:01,767 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 20:07:01,767 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 20:07:01,767 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 20:07:01,767 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 20:07:01,767 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 20:07:01,768 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 20:07:01,768 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 20:07:01,768 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:07:01,768 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:07:01,768 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:07:01,768 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:07:01,769 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 20:07:01,769 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:07:01,769 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:07:01,769 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:07:01,769 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:07:01,770 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 20:07:01,770 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 20:07:01,770 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 20:07:01,770 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 20:07:01,770 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 20:07:01,770 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 20:07:01,771 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 20:07:01,771 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 20:07:01,771 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 20:07:01,771 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 20:07:01,771 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_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 63cd3e528fa28694be9f2ecbe948122395c3f48db5408253e949dc50f2a74038 [2024-11-27 20:07:02,156 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 20:07:02,173 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 20:07:02,178 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 20:07:02,180 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 20:07:02,181 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 20:07:02,182 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound50.c [2024-11-27 20:07:05,918 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/data/afa98161d/b612d081fb5a453facfb56d57ea1ff7b/FLAG31792f0e1 [2024-11-27 20:07:06,276 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 20:07:06,280 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound50.c [2024-11-27 20:07:06,290 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/data/afa98161d/b612d081fb5a453facfb56d57ea1ff7b/FLAG31792f0e1 [2024-11-27 20:07:06,319 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/data/afa98161d/b612d081fb5a453facfb56d57ea1ff7b [2024-11-27 20:07:06,323 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 20:07:06,325 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 20:07:06,327 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 20:07:06,328 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 20:07:06,333 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 20:07:06,334 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:07:06" (1/1) ... [2024-11-27 20:07:06,335 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d563e8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:07:06, skipping insertion in model container [2024-11-27 20:07:06,335 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:07:06" (1/1) ... [2024-11-27 20:07:06,356 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 20:07:06,563 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_834ff834-ca84-4d7a-8f26-3b51a51efc6d/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound50.c[526,539] [2024-11-27 20:07:06,589 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:07:06,604 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 20:07:06,615 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_834ff834-ca84-4d7a-8f26-3b51a51efc6d/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound50.c[526,539] [2024-11-27 20:07:06,623 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:07:06,636 INFO L204 MainTranslator]: Completed translation [2024-11-27 20:07:06,637 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:07:06 WrapperNode [2024-11-27 20:07:06,637 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 20:07:06,638 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 20:07:06,638 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 20:07:06,638 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 20:07:06,646 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:07:06" (1/1) ... [2024-11-27 20:07:06,653 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:07:06" (1/1) ... [2024-11-27 20:07:06,675 INFO L138 Inliner]: procedures = 14, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 62 [2024-11-27 20:07:06,676 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 20:07:06,677 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 20:07:06,677 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 20:07:06,678 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 20:07:06,689 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:07:06" (1/1) ... [2024-11-27 20:07:06,690 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:07:06" (1/1) ... [2024-11-27 20:07:06,692 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:07:06" (1/1) ... [2024-11-27 20:07:06,709 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8]. The 0 writes are split as follows [0, 0]. [2024-11-27 20:07:06,709 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:07:06" (1/1) ... [2024-11-27 20:07:06,709 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:07:06" (1/1) ... [2024-11-27 20:07:06,713 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:07:06" (1/1) ... [2024-11-27 20:07:06,714 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:07:06" (1/1) ... [2024-11-27 20:07:06,719 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:07:06" (1/1) ... [2024-11-27 20:07:06,720 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:07:06" (1/1) ... [2024-11-27 20:07:06,721 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:07:06" (1/1) ... [2024-11-27 20:07:06,722 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 20:07:06,723 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 20:07:06,724 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 20:07:06,724 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 20:07:06,725 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:07:06" (1/1) ... [2024-11-27 20:07:06,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:07:06,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:07:06,768 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 20:07:06,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 20:07:06,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 20:07:06,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 20:07:06,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-27 20:07:06,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 20:07:06,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 20:07:06,811 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-27 20:07:06,811 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-27 20:07:06,895 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 20:07:06,898 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 20:07:07,099 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-11-27 20:07:07,099 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 20:07:07,111 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 20:07:07,113 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-27 20:07:07,113 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:07:07 BoogieIcfgContainer [2024-11-27 20:07:07,113 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 20:07:07,116 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 20:07:07,118 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 20:07:07,124 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 20:07:07,124 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 08:07:06" (1/3) ... [2024-11-27 20:07:07,125 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@92debfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:07:07, skipping insertion in model container [2024-11-27 20:07:07,125 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:07:06" (2/3) ... [2024-11-27 20:07:07,126 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@92debfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:07:07, skipping insertion in model container [2024-11-27 20:07:07,126 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:07:07" (3/3) ... [2024-11-27 20:07:07,127 INFO L128 eAbstractionObserver]: Analyzing ICFG hard2_valuebound50.c [2024-11-27 20:07:07,148 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 20:07:07,149 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG hard2_valuebound50.c that has 2 procedures, 24 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-27 20:07:07,229 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 20:07:07,250 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;@7fed6a46, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 20:07:07,250 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-27 20:07:07,256 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-27 20:07:07,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-27 20:07:07,265 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:07:07,266 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:07:07,266 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:07:07,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:07:07,276 INFO L85 PathProgramCache]: Analyzing trace with hash 121123614, now seen corresponding path program 1 times [2024-11-27 20:07:07,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:07:07,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730911693] [2024-11-27 20:07:07,287 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:07:07,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:07:07,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:07:07,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:07:07,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:07:07,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730911693] [2024-11-27 20:07:07,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730911693] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:07:07,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:07:07,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 20:07:07,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436244884] [2024-11-27 20:07:07,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:07:07,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-27 20:07:07,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:07:07,525 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-27 20:07:07,525 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-27 20:07:07,527 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:07:07,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:07:07,555 INFO L93 Difference]: Finished difference Result 45 states and 79 transitions. [2024-11-27 20:07:07,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-27 20:07:07,557 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-27 20:07:07,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:07:07,566 INFO L225 Difference]: With dead ends: 45 [2024-11-27 20:07:07,566 INFO L226 Difference]: Without dead ends: 20 [2024-11-27 20:07:07,570 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-27 20:07:07,576 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 20:07:07,577 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 20:07:07,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-27 20:07:07,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-11-27 20:07:07,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-27 20:07:07,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2024-11-27 20:07:07,622 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 8 [2024-11-27 20:07:07,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:07:07,622 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2024-11-27 20:07:07,622 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:07:07,623 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2024-11-27 20:07:07,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-27 20:07:07,624 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:07:07,624 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:07:07,624 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 20:07:07,625 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:07:07,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:07:07,626 INFO L85 PathProgramCache]: Analyzing trace with hash 178381916, now seen corresponding path program 1 times [2024-11-27 20:07:07,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:07:07,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659982954] [2024-11-27 20:07:07,626 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:07:07,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:07:07,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:07:07,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:07:07,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:07:07,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659982954] [2024-11-27 20:07:07,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659982954] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:07:07,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:07:07,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:07:07,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545784649] [2024-11-27 20:07:07,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:07:07,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:07:07,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:07:07,921 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:07:07,922 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:07:07,922 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:07:08,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:07:08,019 INFO L93 Difference]: Finished difference Result 32 states and 44 transitions. [2024-11-27 20:07:08,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:07:08,020 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-27 20:07:08,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:07:08,021 INFO L225 Difference]: With dead ends: 32 [2024-11-27 20:07:08,021 INFO L226 Difference]: Without dead ends: 30 [2024-11-27 20:07:08,022 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:07:08,023 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:07:08,023 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 83 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 20:07:08,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-27 20:07:08,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2024-11-27 20:07:08,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-27 20:07:08,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2024-11-27 20:07:08,046 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 8 [2024-11-27 20:07:08,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:07:08,046 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2024-11-27 20:07:08,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:07:08,047 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2024-11-27 20:07:08,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-27 20:07:08,047 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:07:08,047 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:07:08,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 20:07:08,050 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:07:08,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:07:08,051 INFO L85 PathProgramCache]: Analyzing trace with hash 887975295, now seen corresponding path program 1 times [2024-11-27 20:07:08,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:07:08,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302805170] [2024-11-27 20:07:08,052 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:07:08,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:07:08,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:07:08,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:07:08,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:07:08,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302805170] [2024-11-27 20:07:08,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302805170] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:07:08,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:07:08,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:07:08,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322871314] [2024-11-27 20:07:08,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:07:08,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:07:08,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:07:08,272 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:07:08,274 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:07:08,276 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 20:07:08,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:07:08,389 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2024-11-27 20:07:08,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:07:08,390 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-11-27 20:07:08,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:07:08,391 INFO L225 Difference]: With dead ends: 36 [2024-11-27 20:07:08,391 INFO L226 Difference]: Without dead ends: 34 [2024-11-27 20:07:08,391 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:07:08,392 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:07:08,393 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 80 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 20:07:08,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-27 20:07:08,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2024-11-27 20:07:08,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-27 20:07:08,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2024-11-27 20:07:08,410 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 13 [2024-11-27 20:07:08,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:07:08,410 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2024-11-27 20:07:08,410 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 20:07:08,411 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2024-11-27 20:07:08,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-27 20:07:08,411 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:07:08,411 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:07:08,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-27 20:07:08,412 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:07:08,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:07:08,412 INFO L85 PathProgramCache]: Analyzing trace with hash -985253380, now seen corresponding path program 1 times [2024-11-27 20:07:08,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:07:08,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382222978] [2024-11-27 20:07:08,413 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:07:08,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:07:08,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-27 20:07:08,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1170616587] [2024-11-27 20:07:08,458 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:07:08,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:07:08,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:07:08,467 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:07:08,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 20:07:08,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:07:08,557 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 20:07:08,563 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:07:08,737 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:07:08,737 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:07:08,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:07:08,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382222978] [2024-11-27 20:07:08,738 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 20:07:08,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170616587] [2024-11-27 20:07:08,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170616587] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:07:08,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:07:08,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:07:08,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662899370] [2024-11-27 20:07:08,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:07:08,740 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:07:08,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:07:08,742 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:07:08,742 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:07:08,742 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 20:07:08,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:07:08,880 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2024-11-27 20:07:08,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:07:08,881 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2024-11-27 20:07:08,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:07:08,883 INFO L225 Difference]: With dead ends: 51 [2024-11-27 20:07:08,883 INFO L226 Difference]: Without dead ends: 39 [2024-11-27 20:07:08,883 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:07:08,884 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 4 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:07:08,889 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 81 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 20:07:08,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-27 20:07:08,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-27 20:07:08,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-27 20:07:08,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2024-11-27 20:07:08,911 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 18 [2024-11-27 20:07:08,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:07:08,911 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2024-11-27 20:07:08,911 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 20:07:08,912 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2024-11-27 20:07:08,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-27 20:07:08,915 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:07:08,915 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:07:08,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-27 20:07:09,116 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-27 20:07:09,116 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:07:09,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:07:09,117 INFO L85 PathProgramCache]: Analyzing trace with hash 506235226, now seen corresponding path program 1 times [2024-11-27 20:07:09,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:07:09,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087547664] [2024-11-27 20:07:09,118 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:07:09,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:07:09,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-27 20:07:09,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1019949978] [2024-11-27 20:07:09,167 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:07:09,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:07:09,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:07:09,174 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:07:09,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 20:07:09,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:07:09,243 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-27 20:07:09,245 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:07:09,397 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 20:07:09,397 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:07:09,677 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 20:07:09,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:07:09,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087547664] [2024-11-27 20:07:09,677 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 20:07:09,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019949978] [2024-11-27 20:07:09,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019949978] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:07:09,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:07:09,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-11-27 20:07:09,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754597591] [2024-11-27 20:07:09,682 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:07:09,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 20:07:09,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:07:09,683 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 20:07:09,683 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:07:09,684 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-27 20:07:09,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:07:09,892 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2024-11-27 20:07:09,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 20:07:09,894 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 24 [2024-11-27 20:07:09,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:07:09,895 INFO L225 Difference]: With dead ends: 51 [2024-11-27 20:07:09,895 INFO L226 Difference]: Without dead ends: 49 [2024-11-27 20:07:09,895 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-11-27 20:07:09,899 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 11 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:07:09,899 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 74 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 20:07:09,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-27 20:07:09,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2024-11-27 20:07:09,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 29 states have internal predecessors, (34), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-27 20:07:09,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 63 transitions. [2024-11-27 20:07:09,913 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 63 transitions. Word has length 24 [2024-11-27 20:07:09,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:07:09,914 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 63 transitions. [2024-11-27 20:07:09,914 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-27 20:07:09,914 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 63 transitions. [2024-11-27 20:07:09,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-27 20:07:09,915 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:07:09,916 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:07:09,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-27 20:07:10,120 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:07:10,120 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:07:10,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:07:10,121 INFO L85 PathProgramCache]: Analyzing trace with hash 440489026, now seen corresponding path program 1 times [2024-11-27 20:07:10,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:07:10,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576309130] [2024-11-27 20:07:10,121 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:07:10,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:07:10,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-27 20:07:10,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1397380282] [2024-11-27 20:07:10,147 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:07:10,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:07:10,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:07:10,150 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:07:10,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 20:07:10,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:07:10,231 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-27 20:07:10,233 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:07:10,403 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-27 20:07:10,405 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:07:10,539 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-27 20:07:10,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:07:10,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576309130] [2024-11-27 20:07:10,540 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 20:07:10,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397380282] [2024-11-27 20:07:10,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397380282] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 20:07:10,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:07:10,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-11-27 20:07:10,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518080157] [2024-11-27 20:07:10,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:07:10,541 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:07:10,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:07:10,542 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:07:10,542 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:07:10,542 INFO L87 Difference]: Start difference. First operand 48 states and 63 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 20:07:12,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-27 20:07:12,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:07:12,021 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2024-11-27 20:07:12,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:07:12,023 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 34 [2024-11-27 20:07:12,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:07:12,026 INFO L225 Difference]: With dead ends: 57 [2024-11-27 20:07:12,026 INFO L226 Difference]: Without dead ends: 55 [2024-11-27 20:07:12,029 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-27 20:07:12,032 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 4 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-27 20:07:12,032 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 75 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-27 20:07:12,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-27 20:07:12,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2024-11-27 20:07:12,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 33 states have internal predecessors, (37), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-27 20:07:12,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2024-11-27 20:07:12,061 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 34 [2024-11-27 20:07:12,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:07:12,061 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2024-11-27 20:07:12,061 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 20:07:12,062 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2024-11-27 20:07:12,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-27 20:07:12,063 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:07:12,063 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:07:12,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-27 20:07:12,268 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:07:12,268 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:07:12,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:07:12,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1768038797, now seen corresponding path program 1 times [2024-11-27 20:07:12,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:07:12,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38097659] [2024-11-27 20:07:12,270 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:07:12,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:07:12,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:07:12,540 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-27 20:07:12,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:07:12,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38097659] [2024-11-27 20:07:12,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38097659] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:07:12,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:07:12,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:07:12,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050108456] [2024-11-27 20:07:12,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:07:12,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:07:12,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:07:12,542 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:07:12,543 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:07:12,543 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-27 20:07:12,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:07:12,630 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2024-11-27 20:07:12,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:07:12,631 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 40 [2024-11-27 20:07:12,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:07:12,632 INFO L225 Difference]: With dead ends: 62 [2024-11-27 20:07:12,632 INFO L226 Difference]: Without dead ends: 51 [2024-11-27 20:07:12,633 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:07:12,633 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 3 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:07:12,634 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 91 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 20:07:12,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-27 20:07:12,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-11-27 20:07:12,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.206896551724138) internal successors, (35), 32 states have internal predecessors, (35), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-27 20:07:12,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2024-11-27 20:07:12,668 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 40 [2024-11-27 20:07:12,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:07:12,669 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2024-11-27 20:07:12,669 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-27 20:07:12,669 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2024-11-27 20:07:12,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-27 20:07:12,673 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:07:12,673 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:07:12,673 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-27 20:07:12,673 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:07:12,674 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:07:12,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1586990777, now seen corresponding path program 1 times [2024-11-27 20:07:12,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:07:12,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854158103] [2024-11-27 20:07:12,674 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:07:12,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:07:12,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-27 20:07:12,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [951789632] [2024-11-27 20:07:12,723 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:07:12,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:07:12,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:07:12,728 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:07:12,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 20:07:12,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:07:12,814 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-27 20:07:12,818 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:07:13,274 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-27 20:07:13,276 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:07:14,950 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-27 20:07:14,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:07:14,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854158103] [2024-11-27 20:07:14,950 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 20:07:14,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951789632] [2024-11-27 20:07:14,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951789632] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:07:14,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:07:14,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2024-11-27 20:07:14,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980192896] [2024-11-27 20:07:14,951 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:07:14,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-27 20:07:14,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:07:14,952 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-27 20:07:14,956 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-11-27 20:07:14,957 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 15 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 14 states have internal predecessors, (26), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2024-11-27 20:07:16,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:07:16,266 INFO L93 Difference]: Finished difference Result 116 states and 161 transitions. [2024-11-27 20:07:16,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-27 20:07:16,268 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 14 states have internal predecessors, (26), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 52 [2024-11-27 20:07:16,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:07:16,270 INFO L225 Difference]: With dead ends: 116 [2024-11-27 20:07:16,272 INFO L226 Difference]: Without dead ends: 95 [2024-11-27 20:07:16,273 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-11-27 20:07:16,274 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 27 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-27 20:07:16,275 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 147 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-27 20:07:16,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-27 20:07:16,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2024-11-27 20:07:16,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 56 states have internal predecessors, (65), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (30), 26 states have call predecessors, (30), 30 states have call successors, (30) [2024-11-27 20:07:16,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 126 transitions. [2024-11-27 20:07:16,316 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 126 transitions. Word has length 52 [2024-11-27 20:07:16,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:07:16,317 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 126 transitions. [2024-11-27 20:07:16,317 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 14 states have internal predecessors, (26), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2024-11-27 20:07:16,317 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 126 transitions. [2024-11-27 20:07:16,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-27 20:07:16,319 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:07:16,319 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:07:16,332 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-27 20:07:16,524 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:07:16,524 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:07:16,525 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:07:16,525 INFO L85 PathProgramCache]: Analyzing trace with hash -351786085, now seen corresponding path program 1 times [2024-11-27 20:07:16,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:07:16,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962682369] [2024-11-27 20:07:16,525 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:07:16,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:07:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-27 20:07:16,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [604919217] [2024-11-27 20:07:16,564 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:07:16,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:07:16,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:07:16,567 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:07:16,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 20:07:16,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:07:16,677 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-27 20:07:16,684 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:07:17,120 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 22 proven. 32 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-27 20:07:17,120 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:07:17,954 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 22 proven. 32 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-27 20:07:17,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:07:17,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962682369] [2024-11-27 20:07:17,955 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 20:07:17,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604919217] [2024-11-27 20:07:17,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604919217] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:07:17,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:07:17,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2024-11-27 20:07:17,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786732550] [2024-11-27 20:07:17,956 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:07:17,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-27 20:07:17,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:07:17,957 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-27 20:07:17,958 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2024-11-27 20:07:17,958 INFO L87 Difference]: Start difference. First operand 93 states and 126 transitions. Second operand has 16 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 15 states have internal predecessors, (28), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-11-27 20:07:19,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:07:19,475 INFO L93 Difference]: Finished difference Result 142 states and 195 transitions. [2024-11-27 20:07:19,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-27 20:07:19,475 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 15 states have internal predecessors, (28), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 63 [2024-11-27 20:07:19,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:07:19,478 INFO L225 Difference]: With dead ends: 142 [2024-11-27 20:07:19,478 INFO L226 Difference]: Without dead ends: 115 [2024-11-27 20:07:19,479 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2024-11-27 20:07:19,480 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 11 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-27 20:07:19,480 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 155 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-27 20:07:19,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-11-27 20:07:19,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 91. [2024-11-27 20:07:19,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 56 states have internal predecessors, (62), 28 states have call successors, (28), 11 states have call predecessors, (28), 11 states have return successors, (27), 23 states have call predecessors, (27), 27 states have call successors, (27) [2024-11-27 20:07:19,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 117 transitions. [2024-11-27 20:07:19,537 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 117 transitions. Word has length 63 [2024-11-27 20:07:19,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:07:19,537 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 117 transitions. [2024-11-27 20:07:19,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 15 states have internal predecessors, (28), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-11-27 20:07:19,538 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 117 transitions. [2024-11-27 20:07:19,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-27 20:07:19,543 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:07:19,543 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:07:19,556 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-27 20:07:19,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:07:19,744 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:07:19,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:07:19,745 INFO L85 PathProgramCache]: Analyzing trace with hash 946752608, now seen corresponding path program 1 times [2024-11-27 20:07:19,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:07:19,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113327537] [2024-11-27 20:07:19,745 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:07:19,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:07:19,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:07:20,488 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-27 20:07:20,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:07:20,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113327537] [2024-11-27 20:07:20,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113327537] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:07:20,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199470249] [2024-11-27 20:07:20,489 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:07:20,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:07:20,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:07:20,492 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:07:20,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 20:07:20,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:07:20,576 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-27 20:07:20,583 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:07:20,844 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-27 20:07:20,844 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:07:21,456 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-27 20:07:21,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199470249] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:07:21,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:07:21,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2024-11-27 20:07:21,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751713417] [2024-11-27 20:07:21,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:07:21,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-27 20:07:21,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:07:21,460 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-27 20:07:21,460 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-11-27 20:07:21,460 INFO L87 Difference]: Start difference. First operand 91 states and 117 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2024-11-27 20:07:21,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:07:21,824 INFO L93 Difference]: Finished difference Result 110 states and 136 transitions. [2024-11-27 20:07:21,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 20:07:21,825 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) Word has length 68 [2024-11-27 20:07:21,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:07:21,826 INFO L225 Difference]: With dead ends: 110 [2024-11-27 20:07:21,827 INFO L226 Difference]: Without dead ends: 84 [2024-11-27 20:07:21,827 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2024-11-27 20:07:21,829 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 11 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:07:21,829 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 201 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 20:07:21,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-27 20:07:21,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2024-11-27 20:07:21,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 52 states have internal predecessors, (56), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2024-11-27 20:07:21,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2024-11-27 20:07:21,872 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 68 [2024-11-27 20:07:21,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:07:21,873 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2024-11-27 20:07:21,873 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2024-11-27 20:07:21,874 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2024-11-27 20:07:21,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-27 20:07:21,878 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:07:21,879 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:07:21,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-27 20:07:22,079 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:07:22,080 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:07:22,080 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:07:22,080 INFO L85 PathProgramCache]: Analyzing trace with hash -728524620, now seen corresponding path program 2 times [2024-11-27 20:07:22,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:07:22,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601639763] [2024-11-27 20:07:22,081 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:07:22,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:07:22,146 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:07:22,150 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 20:07:22,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1933712246] [2024-11-27 20:07:22,153 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:07:22,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:07:22,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:07:22,158 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:07:22,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 20:07:22,258 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:07:22,258 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:07:22,261 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-27 20:07:22,268 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:07:22,866 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 28 proven. 52 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-27 20:07:22,866 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:07:37,075 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 28 proven. 52 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-27 20:07:37,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:07:37,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601639763] [2024-11-27 20:07:37,076 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 20:07:37,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933712246] [2024-11-27 20:07:37,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933712246] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:07:37,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:07:37,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2024-11-27 20:07:37,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172316222] [2024-11-27 20:07:37,076 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:07:37,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-27 20:07:37,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:07:37,078 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-27 20:07:37,081 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2024-11-27 20:07:37,081 INFO L87 Difference]: Start difference. First operand 84 states and 101 transitions. Second operand has 21 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2024-11-27 20:07:48,355 WARN L286 SmtUtils]: Spent 10.83s on a formula simplification. DAG size of input: 168 DAG size of output: 82 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 20:07:51,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-27 20:07:53,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-27 20:07:54,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:07:54,422 INFO L93 Difference]: Finished difference Result 172 states and 235 transitions. [2024-11-27 20:07:54,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-27 20:07:54,423 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 80 [2024-11-27 20:07:54,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:07:54,427 INFO L225 Difference]: With dead ends: 172 [2024-11-27 20:07:54,427 INFO L226 Difference]: Without dead ends: 142 [2024-11-27 20:07:54,428 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2024-11-27 20:07:54,429 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 39 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2024-11-27 20:07:54,429 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 283 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2024-11-27 20:07:54,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-11-27 20:07:54,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 138. [2024-11-27 20:07:54,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 74 states have (on average 1.2432432432432432) internal successors, (92), 82 states have internal predecessors, (92), 49 states have call successors, (49), 14 states have call predecessors, (49), 14 states have return successors, (48), 41 states have call predecessors, (48), 48 states have call successors, (48) [2024-11-27 20:07:54,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 189 transitions. [2024-11-27 20:07:54,503 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 189 transitions. Word has length 80 [2024-11-27 20:07:54,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:07:54,504 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 189 transitions. [2024-11-27 20:07:54,504 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2024-11-27 20:07:54,504 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 189 transitions. [2024-11-27 20:07:54,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-11-27 20:07:54,506 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:07:54,506 INFO L218 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:07:54,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-27 20:07:54,711 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-27 20:07:54,711 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:07:54,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:07:54,712 INFO L85 PathProgramCache]: Analyzing trace with hash -170783218, now seen corresponding path program 2 times [2024-11-27 20:07:54,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:07:54,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747983824] [2024-11-27 20:07:54,712 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:07:54,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:07:54,775 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:07:54,775 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 20:07:54,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1740186561] [2024-11-27 20:07:54,779 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:07:54,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:07:54,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:07:54,781 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:07:54,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 20:07:54,882 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:07:54,882 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:07:54,885 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-27 20:07:54,889 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:07:55,510 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-11-27 20:07:55,511 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:07:57,889 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-11-27 20:07:57,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:07:57,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747983824] [2024-11-27 20:07:57,890 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 20:07:57,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740186561] [2024-11-27 20:07:57,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740186561] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:07:57,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:07:57,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2024-11-27 20:07:57,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056467179] [2024-11-27 20:07:57,890 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:07:57,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-27 20:07:57,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:07:57,892 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-27 20:07:57,892 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2024-11-27 20:07:57,892 INFO L87 Difference]: Start difference. First operand 138 states and 189 transitions. Second operand has 27 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 25 states have internal predecessors, (34), 15 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) [2024-11-27 20:08:02,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-27 20:08:04,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:08:04,246 INFO L93 Difference]: Finished difference Result 207 states and 292 transitions. [2024-11-27 20:08:04,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-27 20:08:04,247 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 25 states have internal predecessors, (34), 15 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) Word has length 91 [2024-11-27 20:08:04,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:08:04,250 INFO L225 Difference]: With dead ends: 207 [2024-11-27 20:08:04,250 INFO L226 Difference]: Without dead ends: 170 [2024-11-27 20:08:04,251 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=276, Invalid=846, Unknown=0, NotChecked=0, Total=1122 [2024-11-27 20:08:04,252 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 34 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:08:04,252 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 243 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-27 20:08:04,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-11-27 20:08:04,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 142. [2024-11-27 20:08:04,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 77 states have (on average 1.2467532467532467) internal successors, (96), 85 states have internal predecessors, (96), 49 states have call successors, (49), 15 states have call predecessors, (49), 15 states have return successors, (48), 41 states have call predecessors, (48), 48 states have call successors, (48) [2024-11-27 20:08:04,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 193 transitions. [2024-11-27 20:08:04,337 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 193 transitions. Word has length 91 [2024-11-27 20:08:04,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:08:04,337 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 193 transitions. [2024-11-27 20:08:04,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 25 states have internal predecessors, (34), 15 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) [2024-11-27 20:08:04,338 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 193 transitions. [2024-11-27 20:08:04,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-27 20:08:04,340 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:04,340 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:04,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-27 20:08:04,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-27 20:08:04,544 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:08:04,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:04,545 INFO L85 PathProgramCache]: Analyzing trace with hash -289474099, now seen corresponding path program 2 times [2024-11-27 20:08:04,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:04,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170960407] [2024-11-27 20:08:04,545 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:08:04,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:04,607 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:08:04,607 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:08:05,325 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 32 proven. 22 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-11-27 20:08:05,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:05,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170960407] [2024-11-27 20:08:05,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170960407] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:08:05,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759269686] [2024-11-27 20:08:05,325 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:08:05,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:05,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:08:05,328 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:08:05,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-27 20:08:05,424 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:08:05,424 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:08:05,426 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-27 20:08:05,433 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:08:05,834 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 32 proven. 22 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-11-27 20:08:05,834 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:08:07,112 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 32 proven. 22 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-11-27 20:08:07,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759269686] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:08:07,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:08:07,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 19 [2024-11-27 20:08:07,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717877433] [2024-11-27 20:08:07,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:08:07,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-27 20:08:07,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:07,114 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-27 20:08:07,115 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2024-11-27 20:08:07,115 INFO L87 Difference]: Start difference. First operand 142 states and 193 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 17 states have internal predecessors, (38), 13 states have call successors, (50), 3 states have call predecessors, (50), 1 states have return successors, (47), 13 states have call predecessors, (47), 13 states have call successors, (47) [2024-11-27 20:08:07,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:08:07,763 INFO L93 Difference]: Finished difference Result 200 states and 264 transitions. [2024-11-27 20:08:07,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-27 20:08:07,766 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 17 states have internal predecessors, (38), 13 states have call successors, (50), 3 states have call predecessors, (50), 1 states have return successors, (47), 13 states have call predecessors, (47), 13 states have call successors, (47) Word has length 96 [2024-11-27 20:08:07,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:08:07,768 INFO L225 Difference]: With dead ends: 200 [2024-11-27 20:08:07,768 INFO L226 Difference]: Without dead ends: 117 [2024-11-27 20:08:07,769 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 179 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2024-11-27 20:08:07,770 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 13 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-27 20:08:07,770 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 294 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-27 20:08:07,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-11-27 20:08:07,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2024-11-27 20:08:07,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 72 states have internal predecessors, (77), 34 states have call successors, (34), 15 states have call predecessors, (34), 15 states have return successors, (32), 29 states have call predecessors, (32), 32 states have call successors, (32) [2024-11-27 20:08:07,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 143 transitions. [2024-11-27 20:08:07,825 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 143 transitions. Word has length 96 [2024-11-27 20:08:07,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:08:07,825 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 143 transitions. [2024-11-27 20:08:07,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 17 states have internal predecessors, (38), 13 states have call successors, (50), 3 states have call predecessors, (50), 1 states have return successors, (47), 13 states have call predecessors, (47), 13 states have call successors, (47) [2024-11-27 20:08:07,826 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 143 transitions. [2024-11-27 20:08:07,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-27 20:08:07,827 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:07,827 INFO L218 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:07,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-27 20:08:08,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-27 20:08:08,028 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:08:08,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:08,028 INFO L85 PathProgramCache]: Analyzing trace with hash -628355514, now seen corresponding path program 1 times [2024-11-27 20:08:08,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:08,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469644678] [2024-11-27 20:08:08,029 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:08,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:08,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:08,376 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 48 proven. 22 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-11-27 20:08:08,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:08,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469644678] [2024-11-27 20:08:08,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469644678] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:08:08,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753110255] [2024-11-27 20:08:08,377 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:08,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:08,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:08:08,379 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:08:08,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-27 20:08:08,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:08,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 20:08:08,479 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:08:08,566 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 60 proven. 10 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-11-27 20:08:08,566 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:08:08,809 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 60 proven. 10 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-11-27 20:08:08,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753110255] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:08:08,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:08:08,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 9 [2024-11-27 20:08:08,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028657800] [2024-11-27 20:08:08,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:08:08,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-27 20:08:08,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:08,811 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-27 20:08:08,811 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-11-27 20:08:08,812 INFO L87 Difference]: Start difference. First operand 117 states and 143 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 8 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2024-11-27 20:08:09,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:08:09,002 INFO L93 Difference]: Finished difference Result 123 states and 148 transitions. [2024-11-27 20:08:09,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 20:08:09,002 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 8 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 107 [2024-11-27 20:08:09,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:08:09,004 INFO L225 Difference]: With dead ends: 123 [2024-11-27 20:08:09,004 INFO L226 Difference]: Without dead ends: 116 [2024-11-27 20:08:09,005 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 207 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-11-27 20:08:09,005 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 4 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:08:09,006 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 193 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 20:08:09,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-11-27 20:08:09,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2024-11-27 20:08:09,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 66 states have (on average 1.1363636363636365) internal successors, (75), 70 states have internal predecessors, (75), 31 states have call successors, (31), 15 states have call predecessors, (31), 15 states have return successors, (30), 27 states have call predecessors, (30), 30 states have call successors, (30) [2024-11-27 20:08:09,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 136 transitions. [2024-11-27 20:08:09,074 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 136 transitions. Word has length 107 [2024-11-27 20:08:09,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:08:09,075 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 136 transitions. [2024-11-27 20:08:09,075 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 8 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2024-11-27 20:08:09,075 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 136 transitions. [2024-11-27 20:08:09,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-27 20:08:09,079 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:09,079 INFO L218 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:09,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-27 20:08:09,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:09,283 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:08:09,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:09,284 INFO L85 PathProgramCache]: Analyzing trace with hash -684441695, now seen corresponding path program 3 times [2024-11-27 20:08:09,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:09,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363629694] [2024-11-27 20:08:09,285 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:08:09,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:09,411 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-27 20:08:09,411 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 20:08:09,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [284363381] [2024-11-27 20:08:09,413 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:08:09,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:09,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:08:09,418 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:08:09,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-27 20:08:09,509 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-27 20:08:09,510 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:08:09,512 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-27 20:08:09,517 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:08:09,800 INFO L134 CoverageAnalysis]: Checked inductivity of 687 backedges. 153 proven. 41 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2024-11-27 20:08:09,800 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:08:11,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:11,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363629694] [2024-11-27 20:08:11,191 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 20:08:11,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284363381] [2024-11-27 20:08:11,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284363381] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:08:11,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:08:11,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-11-27 20:08:11,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247436622] [2024-11-27 20:08:11,192 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-27 20:08:11,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 20:08:11,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:11,193 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 20:08:11,194 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2024-11-27 20:08:11,194 INFO L87 Difference]: Start difference. First operand 113 states and 136 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-27 20:08:11,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:08:11,462 INFO L93 Difference]: Finished difference Result 120 states and 142 transitions. [2024-11-27 20:08:11,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 20:08:11,462 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 108 [2024-11-27 20:08:11,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:08:11,464 INFO L225 Difference]: With dead ends: 120 [2024-11-27 20:08:11,464 INFO L226 Difference]: Without dead ends: 118 [2024-11-27 20:08:11,464 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-11-27 20:08:11,465 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:08:11,465 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 86 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 20:08:11,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-27 20:08:11,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2024-11-27 20:08:11,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 73 states have internal predecessors, (78), 31 states have call successors, (31), 16 states have call predecessors, (31), 16 states have return successors, (30), 27 states have call predecessors, (30), 30 states have call successors, (30) [2024-11-27 20:08:11,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 139 transitions. [2024-11-27 20:08:11,529 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 139 transitions. Word has length 108 [2024-11-27 20:08:11,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:08:11,530 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 139 transitions. [2024-11-27 20:08:11,530 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-27 20:08:11,530 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 139 transitions. [2024-11-27 20:08:11,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2024-11-27 20:08:11,534 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:11,534 INFO L218 NwaCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:11,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-27 20:08:11,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:11,738 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:08:11,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:11,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1608761601, now seen corresponding path program 3 times [2024-11-27 20:08:11,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:11,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090778148] [2024-11-27 20:08:11,738 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:08:11,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:11,829 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-27 20:08:11,829 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 20:08:11,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1309305810] [2024-11-27 20:08:11,831 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:08:11,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:11,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:08:11,834 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:08:11,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-27 20:08:11,906 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-27 20:08:11,906 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:08:11,908 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-27 20:08:11,912 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:08:12,145 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 163 proven. 50 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2024-11-27 20:08:12,146 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:08:12,429 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 152 proven. 2 refuted. 0 times theorem prover too weak. 691 trivial. 0 not checked. [2024-11-27 20:08:12,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:12,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090778148] [2024-11-27 20:08:12,429 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 20:08:12,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309305810] [2024-11-27 20:08:12,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309305810] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:08:12,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:08:12,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2024-11-27 20:08:12,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613195165] [2024-11-27 20:08:12,430 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:08:12,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-27 20:08:12,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:12,431 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-27 20:08:12,431 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2024-11-27 20:08:12,432 INFO L87 Difference]: Start difference. First operand 117 states and 139 transitions. Second operand has 16 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2024-11-27 20:08:12,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:08:12,832 INFO L93 Difference]: Finished difference Result 118 states and 140 transitions. [2024-11-27 20:08:12,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 20:08:12,833 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) Word has length 119 [2024-11-27 20:08:12,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:08:12,834 INFO L225 Difference]: With dead ends: 118 [2024-11-27 20:08:12,834 INFO L226 Difference]: Without dead ends: 0 [2024-11-27 20:08:12,835 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2024-11-27 20:08:12,836 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 32 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:08:12,836 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 97 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 20:08:12,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-27 20:08:12,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-27 20:08:12,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:08:12,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-27 20:08:12,838 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 119 [2024-11-27 20:08:12,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:08:12,838 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-27 20:08:12,838 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2024-11-27 20:08:12,838 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-27 20:08:12,839 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-27 20:08:12,842 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-27 20:08:12,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-27 20:08:13,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-27 20:08:13,052 INFO L422 BasicCegarLoop]: Path program histogram: [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:13,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-11-27 20:08:15,621 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-27 20:08:15,636 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.11 08:08:15 BoogieIcfgContainer [2024-11-27 20:08:15,636 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-27 20:08:15,637 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-27 20:08:15,637 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-27 20:08:15,637 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-27 20:08:15,638 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:07:07" (3/4) ... [2024-11-27 20:08:15,642 INFO L146 WitnessPrinter]: Generating witness for correct program [2024-11-27 20:08:15,649 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-11-27 20:08:15,657 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2024-11-27 20:08:15,657 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2024-11-27 20:08:15,658 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2024-11-27 20:08:15,658 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-27 20:08:15,658 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-27 20:08:15,782 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/witness.graphml [2024-11-27 20:08:15,782 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/witness.yml [2024-11-27 20:08:15,782 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-27 20:08:15,784 INFO L158 Benchmark]: Toolchain (without parser) took 69458.66ms. Allocated memory was 142.6MB in the beginning and 268.4MB in the end (delta: 125.8MB). Free memory was 118.4MB in the beginning and 136.8MB in the end (delta: -18.4MB). Peak memory consumption was 107.5MB. Max. memory is 16.1GB. [2024-11-27 20:08:15,785 INFO L158 Benchmark]: CDTParser took 2.37ms. Allocated memory is still 142.6MB. Free memory is still 81.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 20:08:15,786 INFO L158 Benchmark]: CACSL2BoogieTranslator took 310.46ms. Allocated memory is still 142.6MB. Free memory was 118.4MB in the beginning and 107.0MB in the end (delta: 11.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-27 20:08:15,786 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.01ms. Allocated memory is still 142.6MB. Free memory was 107.0MB in the beginning and 105.8MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 20:08:15,786 INFO L158 Benchmark]: Boogie Preprocessor took 46.02ms. Allocated memory is still 142.6MB. Free memory was 105.8MB in the beginning and 104.5MB in the end (delta: 1.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-27 20:08:15,787 INFO L158 Benchmark]: RCFGBuilder took 390.08ms. Allocated memory is still 142.6MB. Free memory was 104.5MB in the beginning and 93.1MB in the end (delta: 11.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-27 20:08:15,787 INFO L158 Benchmark]: TraceAbstraction took 68519.65ms. Allocated memory was 142.6MB in the beginning and 268.4MB in the end (delta: 125.8MB). Free memory was 92.6MB in the beginning and 139.9MB in the end (delta: -47.3MB). Peak memory consumption was 133.8MB. Max. memory is 16.1GB. [2024-11-27 20:08:15,787 INFO L158 Benchmark]: Witness Printer took 145.79ms. Allocated memory is still 268.4MB. Free memory was 139.9MB in the beginning and 136.8MB in the end (delta: 3.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-27 20:08:15,791 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 2.37ms. Allocated memory is still 142.6MB. Free memory is still 81.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 310.46ms. Allocated memory is still 142.6MB. Free memory was 118.4MB in the beginning and 107.0MB in the end (delta: 11.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.01ms. Allocated memory is still 142.6MB. Free memory was 107.0MB in the beginning and 105.8MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 46.02ms. Allocated memory is still 142.6MB. Free memory was 105.8MB in the beginning and 104.5MB in the end (delta: 1.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 390.08ms. Allocated memory is still 142.6MB. Free memory was 104.5MB in the beginning and 93.1MB in the end (delta: 11.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 68519.65ms. Allocated memory was 142.6MB in the beginning and 268.4MB in the end (delta: 125.8MB). Free memory was 92.6MB in the beginning and 139.9MB in the end (delta: -47.3MB). Peak memory consumption was 133.8MB. Max. memory is 16.1GB. * Witness Printer took 145.79ms. Allocated memory is still 268.4MB. Free memory was 139.9MB in the beginning and 136.8MB in the end (delta: 3.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 65.9s, OverallIterations: 16, TraceHistogramMax: 21, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.1s, AutomataDifference: 30.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 274 SdHoareTripleChecker+Valid, 12.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 221 mSDsluCounter, 2215 SdHoareTripleChecker+Invalid, 12.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1805 mSDsCounter, 479 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2542 IncrementalHoareTripleChecker+Invalid, 3021 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 479 mSolverCounterUnsat, 410 mSDtfsCounter, 2542 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1663 GetRequests, 1450 SyntacticMatches, 14 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 22.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=142occurred in iteration=12, InterpolantAutomatonStates: 153, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 16 MinimizatonAttempts, 76 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 29.8s InterpolantComputationTime, 1789 NumberOfCodeBlocks, 1647 NumberOfCodeBlocksAsserted, 60 NumberOfCheckSat, 1905 ConstructedInterpolants, 0 QuantifiedInterpolants, 16724 SizeOfPredicates, 26 NumberOfNonLiveVariables, 2004 ConjunctsInSsa, 316 ConjunctsInUnsatCore, 29 InterpolantComputations, 6 PerfectInterpolantSequences, 8759/9332 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: ((((1 <= p) && (A == ((long long) q + r))) && (d == p)) && (B == 1)) - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((((((((d == 1) && (p == 1)) && (q == 0)) && (A == r)) && (B == 1)) || (((((2 == p) && (q == 0)) && (A == r)) && (B == 1)) && (2 == d))) || (((((p == 4) && (q == 0)) && (A == r)) && (d == 4)) && (B == 1))) || (((((8 <= p) && (q == 0)) && (A == r)) && (d == p)) && (B == 1))) RESULT: Ultimate proved your program to be correct! [2024-11-27 20:08:15,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_834ff834-ca84-4d7a-8f26-3b51a51efc6d/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE