./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd --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 776d32abf1ae3b62e7ad4a02cd7c02c0cc6433852a1fe73b7d30c6e216da832a --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 14:42:54,055 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 14:42:54,146 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-13 14:42:54,154 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 14:42:54,154 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 14:42:54,190 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 14:42:54,191 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 14:42:54,191 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 14:42:54,191 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 14:42:54,191 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 14:42:54,192 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 14:42:54,192 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 14:42:54,192 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 14:42:54,192 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 14:42:54,192 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 14:42:54,194 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 14:42:54,194 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 14:42:54,194 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 14:42:54,195 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 14:42:54,195 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 14:42:54,195 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 14:42:54,195 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 14:42:54,196 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 14:42:54,196 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 14:42:54,196 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 14:42:54,196 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 14:42:54,196 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 14:42:54,196 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 14:42:54,197 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 14:42:54,197 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 14:42:54,197 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 14:42:54,197 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 14:42:54,197 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 14:42:54,197 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 14:42:54,198 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 14:42:54,198 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 14:42:54,198 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 14:42:54,198 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 14:42:54,198 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 14:42:54,198 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 14:42:54,198 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 14:42:54,198 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 14:42:54,198 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_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd 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 -> 776d32abf1ae3b62e7ad4a02cd7c02c0cc6433852a1fe73b7d30c6e216da832a [2024-11-13 14:42:54,511 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 14:42:54,520 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 14:42:54,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 14:42:54,524 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 14:42:54,524 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 14:42:54,526 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c Unable to find full path for "g++" [2024-11-13 14:42:56,375 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 14:42:56,697 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 14:42:56,701 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c [2024-11-13 14:42:56,712 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/data/31f81d40d/17926e8d1bff48278e162fa0605117a2/FLAG694463657 [2024-11-13 14:42:56,732 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/data/31f81d40d/17926e8d1bff48278e162fa0605117a2 [2024-11-13 14:42:56,734 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 14:42:56,736 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 14:42:56,739 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 14:42:56,740 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 14:42:56,744 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 14:42:56,745 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:42:56" (1/1) ... [2024-11-13 14:42:56,748 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fdd192d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:42:56, skipping insertion in model container [2024-11-13 14:42:56,748 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:42:56" (1/1) ... [2024-11-13 14:42:56,766 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 14:42:56,944 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_75bd1ae7-383c-4576-b011-5bcc942ee915/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c[490,503] [2024-11-13 14:42:56,963 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 14:42:56,972 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 14:42:56,981 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_75bd1ae7-383c-4576-b011-5bcc942ee915/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c[490,503] [2024-11-13 14:42:56,990 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 14:42:57,002 INFO L204 MainTranslator]: Completed translation [2024-11-13 14:42:57,003 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:42:57 WrapperNode [2024-11-13 14:42:57,003 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 14:42:57,004 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 14:42:57,004 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 14:42:57,004 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 14:42:57,009 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:42:57" (1/1) ... [2024-11-13 14:42:57,014 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:42:57" (1/1) ... [2024-11-13 14:42:57,034 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2024-11-13 14:42:57,035 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 14:42:57,035 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 14:42:57,035 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 14:42:57,035 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 14:42:57,045 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:42:57" (1/1) ... [2024-11-13 14:42:57,046 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:42:57" (1/1) ... [2024-11-13 14:42:57,049 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:42:57" (1/1) ... [2024-11-13 14:42:57,060 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-13 14:42:57,060 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:42:57" (1/1) ... [2024-11-13 14:42:57,060 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:42:57" (1/1) ... [2024-11-13 14:42:57,063 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:42:57" (1/1) ... [2024-11-13 14:42:57,066 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:42:57" (1/1) ... [2024-11-13 14:42:57,067 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:42:57" (1/1) ... [2024-11-13 14:42:57,068 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:42:57" (1/1) ... [2024-11-13 14:42:57,070 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 14:42:57,070 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 14:42:57,071 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 14:42:57,071 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 14:42:57,072 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:42:57" (1/1) ... [2024-11-13 14:42:57,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 14:42:57,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:42:57,100 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 14:42:57,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 14:42:57,123 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 14:42:57,123 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-13 14:42:57,123 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-13 14:42:57,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 14:42:57,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 14:42:57,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 14:42:57,123 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-13 14:42:57,123 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-13 14:42:57,193 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 14:42:57,195 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 14:42:57,370 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-13 14:42:57,370 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 14:42:57,379 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 14:42:57,379 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-13 14:42:57,380 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:42:57 BoogieIcfgContainer [2024-11-13 14:42:57,380 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 14:42:57,383 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 14:42:57,383 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 14:42:57,388 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 14:42:57,388 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:42:56" (1/3) ... [2024-11-13 14:42:57,389 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45216cdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:42:57, skipping insertion in model container [2024-11-13 14:42:57,389 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:42:57" (2/3) ... [2024-11-13 14:42:57,389 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45216cdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:42:57, skipping insertion in model container [2024-11-13 14:42:57,389 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:42:57" (3/3) ... [2024-11-13 14:42:57,391 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound10.c [2024-11-13 14:42:57,406 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 14:42:57,408 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG egcd3-ll_valuebound10.c that has 3 procedures, 35 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-13 14:42:57,462 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 14:42:57,479 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;@202e26ba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 14:42:57,479 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-13 14:42:57,485 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-13 14:42:57,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-13 14:42:57,493 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:42:57,494 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:42:57,494 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:42:57,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:42:57,500 INFO L85 PathProgramCache]: Analyzing trace with hash 882466859, now seen corresponding path program 1 times [2024-11-13 14:42:57,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:42:57,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792970331] [2024-11-13 14:42:57,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:42:57,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:42:57,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:42:57,641 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 14:42:57,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:42:57,650 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-13 14:42:57,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:42:57,656 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-13 14:42:57,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:42:57,662 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-13 14:42:57,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:42:57,672 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-13 14:42:57,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:42:57,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792970331] [2024-11-13 14:42:57,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792970331] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:42:57,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:42:57,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 14:42:57,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293505648] [2024-11-13 14:42:57,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:42:57,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-13 14:42:57,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:42:57,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-13 14:42:57,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-13 14:42:57,701 INFO L87 Difference]: Start difference. First operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 14:42:57,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:42:57,721 INFO L93 Difference]: Finished difference Result 67 states and 109 transitions. [2024-11-13 14:42:57,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-13 14:42:57,723 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2024-11-13 14:42:57,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:42:57,728 INFO L225 Difference]: With dead ends: 67 [2024-11-13 14:42:57,728 INFO L226 Difference]: Without dead ends: 31 [2024-11-13 14:42:57,731 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-13 14:42:57,733 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:42:57,734 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 14:42:57,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-13 14:42:57,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-11-13 14:42:57,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-13 14:42:57,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2024-11-13 14:42:57,764 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 29 [2024-11-13 14:42:57,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:42:57,764 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2024-11-13 14:42:57,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 14:42:57,767 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2024-11-13 14:42:57,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-13 14:42:57,769 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:42:57,769 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:42:57,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 14:42:57,769 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:42:57,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:42:57,770 INFO L85 PathProgramCache]: Analyzing trace with hash 2088050559, now seen corresponding path program 1 times [2024-11-13 14:42:57,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:42:57,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547790467] [2024-11-13 14:42:57,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:42:57,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:42:57,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:42:58,064 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 14:42:58,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:42:58,070 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-13 14:42:58,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:42:58,083 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-13 14:42:58,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:42:58,095 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-13 14:42:58,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:42:58,164 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 14:42:58,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:42:58,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547790467] [2024-11-13 14:42:58,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547790467] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:42:58,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:42:58,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 14:42:58,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316234455] [2024-11-13 14:42:58,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:42:58,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 14:42:58,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:42:58,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 14:42:58,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-13 14:42:58,167 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-13 14:42:58,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:42:58,313 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2024-11-13 14:42:58,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 14:42:58,314 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2024-11-13 14:42:58,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:42:58,314 INFO L225 Difference]: With dead ends: 50 [2024-11-13 14:42:58,315 INFO L226 Difference]: Without dead ends: 43 [2024-11-13 14:42:58,315 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-13 14:42:58,316 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 28 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:42:58,316 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 102 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:42:58,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-13 14:42:58,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2024-11-13 14:42:58,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-13 14:42:58,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2024-11-13 14:42:58,326 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 30 [2024-11-13 14:42:58,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:42:58,326 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2024-11-13 14:42:58,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-13 14:42:58,326 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2024-11-13 14:42:58,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-13 14:42:58,327 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:42:58,327 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:42:58,328 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 14:42:58,328 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:42:58,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:42:58,328 INFO L85 PathProgramCache]: Analyzing trace with hash 2101610938, now seen corresponding path program 1 times [2024-11-13 14:42:58,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:42:58,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413135417] [2024-11-13 14:42:58,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:42:58,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:42:58,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 14:42:58,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [146016698] [2024-11-13 14:42:58,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:42:58,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:42:58,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:42:58,355 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:42:58,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 14:42:58,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:42:58,426 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 14:42:58,431 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:42:58,574 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-13 14:42:58,575 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 14:42:58,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:42:58,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413135417] [2024-11-13 14:42:58,578 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 14:42:58,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146016698] [2024-11-13 14:42:58,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146016698] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:42:58,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:42:58,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:42:58,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743736701] [2024-11-13 14:42:58,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:42:58,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:42:58,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:42:58,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:42:58,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:42:58,580 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-13 14:42:58,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:42:58,636 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2024-11-13 14:42:58,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:42:58,637 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2024-11-13 14:42:58,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:42:58,638 INFO L225 Difference]: With dead ends: 49 [2024-11-13 14:42:58,638 INFO L226 Difference]: Without dead ends: 47 [2024-11-13 14:42:58,638 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-13 14:42:58,639 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 7 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:42:58,640 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 134 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 14:42:58,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-13 14:42:58,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2024-11-13 14:42:58,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-13 14:42:58,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2024-11-13 14:42:58,650 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 33 [2024-11-13 14:42:58,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:42:58,651 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2024-11-13 14:42:58,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-13 14:42:58,651 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2024-11-13 14:42:58,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-13 14:42:58,652 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:42:58,652 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:42:58,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 14:42:58,856 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-13 14:42:58,856 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:42:58,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:42:58,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1711858696, now seen corresponding path program 1 times [2024-11-13 14:42:58,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:42:58,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027464044] [2024-11-13 14:42:58,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:42:58,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:42:58,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:42:59,069 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 14:42:59,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:42:59,073 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-13 14:42:59,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:42:59,080 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-13 14:42:59,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:42:59,148 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-13 14:42:59,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:42:59,161 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 14:42:59,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:42:59,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027464044] [2024-11-13 14:42:59,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027464044] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:42:59,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33380788] [2024-11-13 14:42:59,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:42:59,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:42:59,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:42:59,164 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:42:59,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 14:42:59,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:42:59,238 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 14:42:59,240 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:42:59,316 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 14:42:59,317 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:42:59,477 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 14:42:59,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33380788] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:42:59,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:42:59,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2024-11-13 14:42:59,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618894405] [2024-11-13 14:42:59,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:42:59,478 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 14:42:59,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:42:59,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 14:42:59,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-13 14:42:59,479 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 14:42:59,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:42:59,812 INFO L93 Difference]: Finished difference Result 99 states and 139 transitions. [2024-11-13 14:42:59,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 14:42:59,814 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2024-11-13 14:42:59,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:42:59,818 INFO L225 Difference]: With dead ends: 99 [2024-11-13 14:42:59,818 INFO L226 Difference]: Without dead ends: 92 [2024-11-13 14:42:59,818 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-11-13 14:42:59,819 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 67 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 14:42:59,821 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 234 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 14:42:59,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-13 14:42:59,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 67. [2024-11-13 14:42:59,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-13 14:42:59,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 91 transitions. [2024-11-13 14:42:59,856 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 91 transitions. Word has length 35 [2024-11-13 14:42:59,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:42:59,857 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 91 transitions. [2024-11-13 14:42:59,857 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 14:42:59,857 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 91 transitions. [2024-11-13 14:42:59,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-13 14:42:59,858 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:42:59,858 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:42:59,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-13 14:43:00,058 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:43:00,059 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:43:00,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:43:00,059 INFO L85 PathProgramCache]: Analyzing trace with hash -591630989, now seen corresponding path program 1 times [2024-11-13 14:43:00,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:43:00,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474333977] [2024-11-13 14:43:00,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:43:00,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:43:00,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 14:43:00,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1606787883] [2024-11-13 14:43:00,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:43:00,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:43:00,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:43:00,090 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:43:00,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 14:43:00,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:43:00,149 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 14:43:00,152 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:43:00,256 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-13 14:43:00,256 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 14:43:00,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:43:00,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474333977] [2024-11-13 14:43:00,257 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 14:43:00,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606787883] [2024-11-13 14:43:00,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606787883] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:43:00,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:43:00,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:43:00,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001540504] [2024-11-13 14:43:00,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:43:00,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:43:00,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:43:00,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:43:00,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:43:00,258 INFO L87 Difference]: Start difference. First operand 67 states and 91 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-13 14:43:00,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:43:00,345 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2024-11-13 14:43:00,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:43:00,345 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2024-11-13 14:43:00,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:43:00,346 INFO L225 Difference]: With dead ends: 75 [2024-11-13 14:43:00,347 INFO L226 Difference]: Without dead ends: 73 [2024-11-13 14:43:00,347 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-13 14:43:00,348 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 7 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:43:00,348 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 131 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:43:00,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-13 14:43:00,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2024-11-13 14:43:00,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-13 14:43:00,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2024-11-13 14:43:00,367 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 38 [2024-11-13 14:43:00,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:43:00,367 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2024-11-13 14:43:00,367 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-13 14:43:00,367 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2024-11-13 14:43:00,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-13 14:43:00,368 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:43:00,368 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:43:00,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 14:43:00,573 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:43:00,573 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:43:00,573 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:43:00,573 INFO L85 PathProgramCache]: Analyzing trace with hash 539495569, now seen corresponding path program 1 times [2024-11-13 14:43:00,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:43:00,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086107404] [2024-11-13 14:43:00,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:43:00,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:43:00,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 14:43:00,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1871471823] [2024-11-13 14:43:00,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:43:00,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:43:00,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:43:00,594 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:43:00,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 14:43:00,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:43:00,669 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-13 14:43:00,674 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:43:00,854 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-13 14:43:00,854 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:43:00,989 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-13 14:43:00,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:43:00,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086107404] [2024-11-13 14:43:00,989 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 14:43:00,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871471823] [2024-11-13 14:43:00,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871471823] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:43:00,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:43:00,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2024-11-13 14:43:00,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91194061] [2024-11-13 14:43:00,990 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 14:43:00,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 14:43:00,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:43:00,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 14:43:00,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-13 14:43:00,991 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-13 14:43:01,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:43:01,365 INFO L93 Difference]: Finished difference Result 107 states and 143 transitions. [2024-11-13 14:43:01,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 14:43:01,366 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2024-11-13 14:43:01,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:43:01,368 INFO L225 Difference]: With dead ends: 107 [2024-11-13 14:43:01,369 INFO L226 Difference]: Without dead ends: 105 [2024-11-13 14:43:01,370 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-11-13 14:43:01,370 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 30 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 14:43:01,372 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 235 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 14:43:01,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-11-13 14:43:01,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2024-11-13 14:43:01,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 71 states have internal predecessors, (88), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-11-13 14:43:01,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 137 transitions. [2024-11-13 14:43:01,414 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 137 transitions. Word has length 38 [2024-11-13 14:43:01,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:43:01,415 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 137 transitions. [2024-11-13 14:43:01,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-13 14:43:01,415 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 137 transitions. [2024-11-13 14:43:01,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-13 14:43:01,417 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:43:01,417 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:43:01,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-13 14:43:01,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:43:01,618 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:43:01,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:43:01,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1814590182, now seen corresponding path program 1 times [2024-11-13 14:43:01,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:43:01,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060996039] [2024-11-13 14:43:01,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:43:01,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:43:01,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 14:43:01,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [139000121] [2024-11-13 14:43:01,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:43:01,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:43:01,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:43:01,640 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:43:01,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 14:43:01,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:43:01,704 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 14:43:01,706 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:43:01,769 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-13 14:43:01,769 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 14:43:01,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:43:01,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060996039] [2024-11-13 14:43:01,770 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 14:43:01,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139000121] [2024-11-13 14:43:01,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139000121] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:43:01,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:43:01,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:43:01,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911764925] [2024-11-13 14:43:01,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:43:01,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:43:01,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:43:01,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:43:01,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:43:01,771 INFO L87 Difference]: Start difference. First operand 101 states and 137 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-13 14:43:01,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:43:01,889 INFO L93 Difference]: Finished difference Result 147 states and 209 transitions. [2024-11-13 14:43:01,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:43:01,889 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2024-11-13 14:43:01,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:43:01,891 INFO L225 Difference]: With dead ends: 147 [2024-11-13 14:43:01,891 INFO L226 Difference]: Without dead ends: 145 [2024-11-13 14:43:01,891 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-13 14:43:01,892 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:43:01,892 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 124 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:43:01,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-11-13 14:43:01,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 139. [2024-11-13 14:43:01,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 87 states have (on average 1.2873563218390804) internal successors, (112), 88 states have internal predecessors, (112), 45 states have call successors, (45), 6 states have call predecessors, (45), 6 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-11-13 14:43:01,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 201 transitions. [2024-11-13 14:43:01,962 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 201 transitions. Word has length 43 [2024-11-13 14:43:01,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:43:01,966 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 201 transitions. [2024-11-13 14:43:01,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-13 14:43:01,966 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 201 transitions. [2024-11-13 14:43:01,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-13 14:43:01,967 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:43:01,967 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:43:01,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-13 14:43:02,168 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:43:02,168 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:43:02,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:43:02,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1089181948, now seen corresponding path program 1 times [2024-11-13 14:43:02,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:43:02,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482101699] [2024-11-13 14:43:02,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:43:02,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:43:02,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 14:43:02,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [602960551] [2024-11-13 14:43:02,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:43:02,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:43:02,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:43:02,206 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:43:02,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 14:43:02,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:43:02,278 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-13 14:43:02,283 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:43:02,497 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-13 14:43:02,497 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:43:02,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:43:02,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482101699] [2024-11-13 14:43:02,570 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 14:43:02,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602960551] [2024-11-13 14:43:02,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602960551] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:43:02,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-13 14:43:02,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2024-11-13 14:43:02,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508314026] [2024-11-13 14:43:02,571 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-13 14:43:02,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 14:43:02,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:43:02,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 14:43:02,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-13 14:43:02,572 INFO L87 Difference]: Start difference. First operand 139 states and 201 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-13 14:43:02,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:43:02,805 INFO L93 Difference]: Finished difference Result 152 states and 212 transitions. [2024-11-13 14:43:02,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 14:43:02,806 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2024-11-13 14:43:02,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:43:02,808 INFO L225 Difference]: With dead ends: 152 [2024-11-13 14:43:02,808 INFO L226 Difference]: Without dead ends: 150 [2024-11-13 14:43:02,808 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-13 14:43:02,809 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 26 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:43:02,809 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 209 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:43:02,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-11-13 14:43:02,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2024-11-13 14:43:02,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 93 states have (on average 1.2688172043010753) internal successors, (118), 94 states have internal predecessors, (118), 45 states have call successors, (45), 8 states have call predecessors, (45), 8 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-11-13 14:43:02,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 207 transitions. [2024-11-13 14:43:02,849 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 207 transitions. Word has length 43 [2024-11-13 14:43:02,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:43:02,850 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 207 transitions. [2024-11-13 14:43:02,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-13 14:43:02,850 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 207 transitions. [2024-11-13 14:43:02,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-13 14:43:02,852 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:43:02,852 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:43:02,872 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 14:43:03,057 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:43:03,057 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:43:03,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:43:03,058 INFO L85 PathProgramCache]: Analyzing trace with hash -2074658790, now seen corresponding path program 2 times [2024-11-13 14:43:03,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:43:03,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452235767] [2024-11-13 14:43:03,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:43:03,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:43:03,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:43:03,155 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 14:43:03,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:43:03,158 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-13 14:43:03,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:43:03,161 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-13 14:43:03,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:43:03,164 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-13 14:43:03,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:43:03,166 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-13 14:43:03,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:43:03,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452235767] [2024-11-13 14:43:03,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452235767] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:43:03,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:43:03,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:43:03,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729333935] [2024-11-13 14:43:03,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:43:03,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:43:03,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:43:03,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:43:03,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:43:03,169 INFO L87 Difference]: Start difference. First operand 147 states and 207 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-13 14:43:03,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:43:03,305 INFO L93 Difference]: Finished difference Result 186 states and 259 transitions. [2024-11-13 14:43:03,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 14:43:03,306 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2024-11-13 14:43:03,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:43:03,307 INFO L225 Difference]: With dead ends: 186 [2024-11-13 14:43:03,307 INFO L226 Difference]: Without dead ends: 130 [2024-11-13 14:43:03,308 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-13 14:43:03,309 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 18 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:43:03,309 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 160 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:43:03,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-11-13 14:43:03,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 122. [2024-11-13 14:43:03,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 76 states have (on average 1.2105263157894737) internal successors, (92), 77 states have internal predecessors, (92), 37 states have call successors, (37), 8 states have call predecessors, (37), 8 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2024-11-13 14:43:03,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 165 transitions. [2024-11-13 14:43:03,338 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 165 transitions. Word has length 43 [2024-11-13 14:43:03,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:43:03,338 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 165 transitions. [2024-11-13 14:43:03,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-13 14:43:03,339 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 165 transitions. [2024-11-13 14:43:03,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-13 14:43:03,339 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:43:03,343 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:43:03,343 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-13 14:43:03,343 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:43:03,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:43:03,344 INFO L85 PathProgramCache]: Analyzing trace with hash 418264467, now seen corresponding path program 1 times [2024-11-13 14:43:03,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:43:03,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015682364] [2024-11-13 14:43:03,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:43:03,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:43:03,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 14:43:03,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1668560800] [2024-11-13 14:43:03,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:43:03,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:43:03,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:43:03,371 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:43:03,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 14:43:03,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:43:03,430 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 14:43:03,432 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:43:03,495 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-13 14:43:03,495 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 14:43:03,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:43:03,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015682364] [2024-11-13 14:43:03,496 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 14:43:03,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668560800] [2024-11-13 14:43:03,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668560800] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:43:03,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:43:03,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:43:03,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28873428] [2024-11-13 14:43:03,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:43:03,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:43:03,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:43:03,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:43:03,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:43:03,499 INFO L87 Difference]: Start difference. First operand 122 states and 165 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-13 14:43:03,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:43:03,594 INFO L93 Difference]: Finished difference Result 180 states and 262 transitions. [2024-11-13 14:43:03,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:43:03,595 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2024-11-13 14:43:03,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:43:03,597 INFO L225 Difference]: With dead ends: 180 [2024-11-13 14:43:03,599 INFO L226 Difference]: Without dead ends: 178 [2024-11-13 14:43:03,599 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-13 14:43:03,600 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:43:03,601 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 132 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 14:43:03,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-11-13 14:43:03,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 166. [2024-11-13 14:43:03,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 96 states have internal predecessors, (103), 69 states have call successors, (69), 9 states have call predecessors, (69), 9 states have return successors, (68), 60 states have call predecessors, (68), 68 states have call successors, (68) [2024-11-13 14:43:03,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 240 transitions. [2024-11-13 14:43:03,648 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 240 transitions. Word has length 48 [2024-11-13 14:43:03,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:43:03,648 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 240 transitions. [2024-11-13 14:43:03,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-13 14:43:03,649 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 240 transitions. [2024-11-13 14:43:03,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-13 14:43:03,650 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:43:03,650 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:43:03,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 14:43:03,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:43:03,851 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:43:03,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:43:03,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1832649481, now seen corresponding path program 1 times [2024-11-13 14:43:03,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:43:03,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155321405] [2024-11-13 14:43:03,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:43:03,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:43:03,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 14:43:03,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1825235911] [2024-11-13 14:43:03,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:43:03,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:43:03,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:43:03,873 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:43:03,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 14:43:03,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:43:03,955 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-13 14:43:03,957 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:43:04,807 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-13 14:43:04,808 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:43:06,704 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-13 14:43:06,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:43:06,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155321405] [2024-11-13 14:43:06,705 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 14:43:06,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825235911] [2024-11-13 14:43:06,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825235911] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:43:06,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:43:06,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-11-13 14:43:06,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618119888] [2024-11-13 14:43:06,705 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 14:43:06,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-13 14:43:06,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:43:06,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-13 14:43:06,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2024-11-13 14:43:06,707 INFO L87 Difference]: Start difference. First operand 166 states and 240 transitions. Second operand has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2024-11-13 14:43:12,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:43:12,179 INFO L93 Difference]: Finished difference Result 445 states and 665 transitions. [2024-11-13 14:43:12,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-13 14:43:12,179 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 60 [2024-11-13 14:43:12,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:43:12,184 INFO L225 Difference]: With dead ends: 445 [2024-11-13 14:43:12,184 INFO L226 Difference]: Without dead ends: 342 [2024-11-13 14:43:12,186 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=398, Invalid=1672, Unknown=0, NotChecked=0, Total=2070 [2024-11-13 14:43:12,186 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 167 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2024-11-13 14:43:12,187 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 391 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2024-11-13 14:43:12,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2024-11-13 14:43:12,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 256. [2024-11-13 14:43:12,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 150 states have (on average 1.2066666666666668) internal successors, (181), 157 states have internal predecessors, (181), 93 states have call successors, (93), 12 states have call predecessors, (93), 12 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2024-11-13 14:43:12,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 366 transitions. [2024-11-13 14:43:12,317 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 366 transitions. Word has length 60 [2024-11-13 14:43:12,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:43:12,317 INFO L471 AbstractCegarLoop]: Abstraction has 256 states and 366 transitions. [2024-11-13 14:43:12,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2024-11-13 14:43:12,318 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 366 transitions. [2024-11-13 14:43:12,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-13 14:43:12,319 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:43:12,319 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:43:12,333 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-13 14:43:12,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:43:12,522 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:43:12,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:43:12,522 INFO L85 PathProgramCache]: Analyzing trace with hash 536344020, now seen corresponding path program 1 times [2024-11-13 14:43:12,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:43:12,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681560238] [2024-11-13 14:43:12,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:43:12,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:43:12,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 14:43:12,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [635672687] [2024-11-13 14:43:12,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:43:12,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:43:12,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:43:12,546 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:43:12,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 14:43:12,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:43:12,609 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-13 14:43:12,611 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:43:12,701 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-11-13 14:43:12,701 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:43:12,784 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-11-13 14:43:12,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:43:12,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681560238] [2024-11-13 14:43:12,784 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 14:43:12,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635672687] [2024-11-13 14:43:12,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635672687] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 14:43:12,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 14:43:12,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-11-13 14:43:12,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043523252] [2024-11-13 14:43:12,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:43:12,785 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:43:12,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:43:12,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:43:12,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-13 14:43:12,786 INFO L87 Difference]: Start difference. First operand 256 states and 366 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-13 14:43:12,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:43:12,933 INFO L93 Difference]: Finished difference Result 262 states and 371 transitions. [2024-11-13 14:43:12,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:43:12,934 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 70 [2024-11-13 14:43:12,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:43:12,937 INFO L225 Difference]: With dead ends: 262 [2024-11-13 14:43:12,937 INFO L226 Difference]: Without dead ends: 260 [2024-11-13 14:43:12,937 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-13 14:43:12,938 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:43:12,938 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 127 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 14:43:12,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2024-11-13 14:43:13,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2024-11-13 14:43:13,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 153 states have (on average 1.2026143790849673) internal successors, (184), 160 states have internal predecessors, (184), 93 states have call successors, (93), 13 states have call predecessors, (93), 13 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2024-11-13 14:43:13,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 369 transitions. [2024-11-13 14:43:13,029 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 369 transitions. Word has length 70 [2024-11-13 14:43:13,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:43:13,030 INFO L471 AbstractCegarLoop]: Abstraction has 260 states and 369 transitions. [2024-11-13 14:43:13,030 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-13 14:43:13,030 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 369 transitions. [2024-11-13 14:43:13,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-13 14:43:13,031 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:43:13,031 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:43:13,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-13 14:43:13,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-13 14:43:13,232 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:43:13,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:43:13,232 INFO L85 PathProgramCache]: Analyzing trace with hash -752766329, now seen corresponding path program 1 times [2024-11-13 14:43:13,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:43:13,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519243067] [2024-11-13 14:43:13,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:43:13,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:43:13,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 14:43:13,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [377689785] [2024-11-13 14:43:13,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:43:13,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:43:13,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:43:13,266 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:43:13,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 14:43:13,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:43:13,337 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-13 14:43:13,339 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:43:13,962 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 14:43:13,962 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:43:14,260 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-13 14:43:14,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:43:14,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519243067] [2024-11-13 14:43:14,261 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 14:43:14,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377689785] [2024-11-13 14:43:14,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377689785] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:43:14,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:43:14,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 22 [2024-11-13 14:43:14,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789313636] [2024-11-13 14:43:14,261 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 14:43:14,261 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-13 14:43:14,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:43:14,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-13 14:43:14,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2024-11-13 14:43:14,263 INFO L87 Difference]: Start difference. First operand 260 states and 369 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 19 states have internal predecessors, (61), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2024-11-13 14:43:17,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:43:17,463 INFO L93 Difference]: Finished difference Result 322 states and 459 transitions. [2024-11-13 14:43:17,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-13 14:43:17,464 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 19 states have internal predecessors, (61), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 68 [2024-11-13 14:43:17,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:43:17,466 INFO L225 Difference]: With dead ends: 322 [2024-11-13 14:43:17,467 INFO L226 Difference]: Without dead ends: 320 [2024-11-13 14:43:17,467 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2024-11-13 14:43:17,468 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 114 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-13 14:43:17,468 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 576 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-13 14:43:17,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2024-11-13 14:43:17,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 268. [2024-11-13 14:43:17,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 159 states have (on average 1.1949685534591195) internal successors, (190), 166 states have internal predecessors, (190), 93 states have call successors, (93), 15 states have call predecessors, (93), 15 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2024-11-13 14:43:17,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 375 transitions. [2024-11-13 14:43:17,586 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 375 transitions. Word has length 68 [2024-11-13 14:43:17,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:43:17,587 INFO L471 AbstractCegarLoop]: Abstraction has 268 states and 375 transitions. [2024-11-13 14:43:17,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 19 states have internal predecessors, (61), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2024-11-13 14:43:17,587 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 375 transitions. [2024-11-13 14:43:17,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-13 14:43:17,588 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:43:17,588 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:43:17,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-13 14:43:17,789 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-13 14:43:17,789 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:43:17,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:43:17,789 INFO L85 PathProgramCache]: Analyzing trace with hash 132460772, now seen corresponding path program 2 times [2024-11-13 14:43:17,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:43:17,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128700199] [2024-11-13 14:43:17,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:43:17,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:43:17,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:43:17,866 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 14:43:17,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:43:17,869 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-13 14:43:17,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:43:17,872 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-13 14:43:17,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:43:17,874 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-13 14:43:17,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:43:17,877 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-13 14:43:17,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:43:17,881 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-11-13 14:43:17,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:43:17,886 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-11-13 14:43:17,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:43:17,890 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-11-13 14:43:17,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:43:17,894 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-11-13 14:43:17,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:43:17,897 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-11-13 14:43:17,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:43:17,900 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2024-11-13 14:43:17,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:43:17,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128700199] [2024-11-13 14:43:17,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128700199] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:43:17,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:43:17,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:43:17,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004989092] [2024-11-13 14:43:17,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:43:17,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:43:17,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:43:17,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:43:17,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:43:17,902 INFO L87 Difference]: Start difference. First operand 268 states and 375 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-13 14:43:18,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:43:18,099 INFO L93 Difference]: Finished difference Result 459 states and 645 transitions. [2024-11-13 14:43:18,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:43:18,100 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 73 [2024-11-13 14:43:18,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:43:18,102 INFO L225 Difference]: With dead ends: 459 [2024-11-13 14:43:18,102 INFO L226 Difference]: Without dead ends: 289 [2024-11-13 14:43:18,103 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-13 14:43:18,104 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 1 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:43:18,104 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 121 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 14:43:18,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2024-11-13 14:43:18,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 277. [2024-11-13 14:43:18,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 168 states have (on average 1.1964285714285714) internal successors, (201), 169 states have internal predecessors, (201), 93 states have call successors, (93), 15 states have call predecessors, (93), 15 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2024-11-13 14:43:18,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 386 transitions. [2024-11-13 14:43:18,235 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 386 transitions. Word has length 73 [2024-11-13 14:43:18,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:43:18,236 INFO L471 AbstractCegarLoop]: Abstraction has 277 states and 386 transitions. [2024-11-13 14:43:18,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-13 14:43:18,236 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 386 transitions. [2024-11-13 14:43:18,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-13 14:43:18,237 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:43:18,237 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:43:18,237 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-13 14:43:18,237 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:43:18,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:43:18,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1258734394, now seen corresponding path program 3 times [2024-11-13 14:43:18,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:43:18,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56865489] [2024-11-13 14:43:18,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:43:18,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:43:18,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 14:43:18,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1767282259] [2024-11-13 14:43:18,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:43:18,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:43:18,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:43:18,266 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:43:18,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 14:43:18,344 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 14:43:18,344 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:43:18,347 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-13 14:43:18,349 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:43:19,279 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 27 proven. 26 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-13 14:43:19,279 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:43:20,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:43:20,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56865489] [2024-11-13 14:43:20,943 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 14:43:20,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767282259] [2024-11-13 14:43:20,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767282259] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:43:20,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-13 14:43:20,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-11-13 14:43:20,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797473430] [2024-11-13 14:43:20,944 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-13 14:43:20,944 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-13 14:43:20,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:43:20,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-13 14:43:20,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2024-11-13 14:43:20,945 INFO L87 Difference]: Start difference. First operand 277 states and 386 transitions. Second operand has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-13 14:43:22,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:43:22,285 INFO L93 Difference]: Finished difference Result 344 states and 469 transitions. [2024-11-13 14:43:22,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-13 14:43:22,286 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 73 [2024-11-13 14:43:22,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:43:22,288 INFO L225 Difference]: With dead ends: 344 [2024-11-13 14:43:22,288 INFO L226 Difference]: Without dead ends: 342 [2024-11-13 14:43:22,289 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2024-11-13 14:43:22,289 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 70 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 14:43:22,290 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 491 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 14:43:22,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2024-11-13 14:43:22,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 332. [2024-11-13 14:43:22,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 202 states have (on average 1.188118811881188) internal successors, (240), 203 states have internal predecessors, (240), 109 states have call successors, (109), 20 states have call predecessors, (109), 20 states have return successors, (108), 108 states have call predecessors, (108), 108 states have call successors, (108) [2024-11-13 14:43:22,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 457 transitions. [2024-11-13 14:43:22,432 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 457 transitions. Word has length 73 [2024-11-13 14:43:22,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:43:22,433 INFO L471 AbstractCegarLoop]: Abstraction has 332 states and 457 transitions. [2024-11-13 14:43:22,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-13 14:43:22,433 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 457 transitions. [2024-11-13 14:43:22,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-13 14:43:22,437 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:43:22,437 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:43:22,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-13 14:43:22,641 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-13 14:43:22,641 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:43:22,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:43:22,641 INFO L85 PathProgramCache]: Analyzing trace with hash -582145069, now seen corresponding path program 1 times [2024-11-13 14:43:22,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:43:22,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290468616] [2024-11-13 14:43:22,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:43:22,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:43:22,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 14:43:22,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [200354466] [2024-11-13 14:43:22,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:43:22,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:43:22,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:43:22,666 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:43:22,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-13 14:43:22,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:43:22,744 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-11-13 14:43:22,747 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:43:24,023 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2024-11-13 14:43:24,024 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:43:30,684 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 30 proven. 26 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2024-11-13 14:43:30,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:43:30,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290468616] [2024-11-13 14:43:30,684 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 14:43:30,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200354466] [2024-11-13 14:43:30,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200354466] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:43:30,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:43:30,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 35 [2024-11-13 14:43:30,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903125188] [2024-11-13 14:43:30,685 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 14:43:30,685 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-13 14:43:30,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:43:30,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-13 14:43:30,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2024-11-13 14:43:30,687 INFO L87 Difference]: Start difference. First operand 332 states and 457 transitions. Second operand has 35 states, 33 states have (on average 1.878787878787879) internal successors, (62), 33 states have internal predecessors, (62), 10 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2024-11-13 14:43:55,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.43s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:44:14,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:44:33,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:44:35,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:44:46,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:44:50,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.77s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:44:52,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:45:14,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.89s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:45:17,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:45:22,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:45:25,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:45:46,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:45:49,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:45:53,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:45:54,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:45:56,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:46:03,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:46:07,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:46:14,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:46:16,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:46:27,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.82s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:46:28,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:47:23,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:47:48,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:48:16,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:48:18,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:48:22,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:48:27,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.91s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:48:28,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:48:32,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:48:33,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:48:42,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:48:43,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:48:47,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:48:52,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:48:56,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:49:04,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:49:06,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:49:10,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.71s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:49:13,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:49:39,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:49:44,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:49:47,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.87s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:49:53,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:50:18,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:50:21,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:50:26,890 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:50:36,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:50:40,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:50:52,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:50:57,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.32s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:51:18,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:51:39,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:51:41,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:51:47,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:51:49,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:51:51,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:51:55,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:51:58,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:52:02,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.53s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:52:05,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:52:23,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:52:27,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:52:29,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.44s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:52:43,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:52:47,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:53:20,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:53:22,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:53:26,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:53:28,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:53:30,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:53:33,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:53:44,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:53:49,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:53:51,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:53:55,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.77s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:53:59,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-13 14:55:16,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:55:16,237 INFO L93 Difference]: Finished difference Result 591 states and 853 transitions. [2024-11-13 14:55:16,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2024-11-13 14:55:16,238 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 1.878787878787879) internal successors, (62), 33 states have internal predecessors, (62), 10 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 87 [2024-11-13 14:55:16,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:55:16,243 INFO L225 Difference]: With dead ends: 591 [2024-11-13 14:55:16,243 INFO L226 Difference]: Without dead ends: 583 [2024-11-13 14:55:16,247 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4129 ImplicationChecksByTransitivity, 423.8s TimeCoverageRelationStatistics Valid=2405, Invalid=11382, Unknown=19, NotChecked=0, Total=13806 [2024-11-13 14:55:16,248 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 316 mSDsluCounter, 1239 mSDsCounter, 0 mSdLazyCounter, 1778 mSolverCounterSat, 294 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 284.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 1310 SdHoareTripleChecker+Invalid, 2084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 1778 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 284.8s IncrementalHoareTripleChecker+Time [2024-11-13 14:55:16,249 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 1310 Invalid, 2084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 1778 Invalid, 12 Unknown, 0 Unchecked, 284.8s Time] [2024-11-13 14:55:16,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2024-11-13 14:55:16,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 449. [2024-11-13 14:55:16,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 269 states have (on average 1.2193308550185873) internal successors, (328), 270 states have internal predecessors, (328), 157 states have call successors, (157), 22 states have call predecessors, (157), 22 states have return successors, (156), 156 states have call predecessors, (156), 156 states have call successors, (156) [2024-11-13 14:55:16,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 641 transitions. [2024-11-13 14:55:16,719 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 641 transitions. Word has length 87 [2024-11-13 14:55:16,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:55:16,720 INFO L471 AbstractCegarLoop]: Abstraction has 449 states and 641 transitions. [2024-11-13 14:55:16,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 1.878787878787879) internal successors, (62), 33 states have internal predecessors, (62), 10 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2024-11-13 14:55:16,721 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 641 transitions. [2024-11-13 14:55:16,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-13 14:55:16,722 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:55:16,723 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:55:16,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-13 14:55:16,923 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-13 14:55:16,923 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:55:16,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:55:16,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1455410980, now seen corresponding path program 1 times [2024-11-13 14:55:16,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:55:16,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096497614] [2024-11-13 14:55:16,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:55:16,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:55:16,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 14:55:16,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1816066756] [2024-11-13 14:55:16,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:55:16,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:55:16,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:55:16,957 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:55:16,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-13 14:55:17,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:55:17,039 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-13 14:55:17,041 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:55:17,511 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 26 proven. 19 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2024-11-13 14:55:17,511 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:55:18,304 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2024-11-13 14:55:18,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:55:18,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096497614] [2024-11-13 14:55:18,304 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 14:55:18,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816066756] [2024-11-13 14:55:18,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816066756] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:55:18,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:55:18,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2024-11-13 14:55:18,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680171080] [2024-11-13 14:55:18,305 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 14:55:18,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-13 14:55:18,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:55:18,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-13 14:55:18,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2024-11-13 14:55:18,307 INFO L87 Difference]: Start difference. First operand 449 states and 641 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 19 states have internal predecessors, (43), 8 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2024-11-13 14:55:22,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:55:22,810 INFO L93 Difference]: Finished difference Result 991 states and 1551 transitions. [2024-11-13 14:55:22,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-13 14:55:22,811 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 19 states have internal predecessors, (43), 8 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 90 [2024-11-13 14:55:22,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:55:22,819 INFO L225 Difference]: With dead ends: 991 [2024-11-13 14:55:22,819 INFO L226 Difference]: Without dead ends: 989 [2024-11-13 14:55:22,821 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=528, Invalid=1824, Unknown=0, NotChecked=0, Total=2352 [2024-11-13 14:55:22,823 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 150 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-13 14:55:22,824 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 499 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-13 14:55:22,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2024-11-13 14:55:23,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 828. [2024-11-13 14:55:23,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 429 states have (on average 1.2913752913752914) internal successors, (554), 430 states have internal predecessors, (554), 373 states have call successors, (373), 25 states have call predecessors, (373), 25 states have return successors, (372), 372 states have call predecessors, (372), 372 states have call successors, (372) [2024-11-13 14:55:23,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1299 transitions. [2024-11-13 14:55:23,900 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1299 transitions. Word has length 90 [2024-11-13 14:55:23,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:55:23,900 INFO L471 AbstractCegarLoop]: Abstraction has 828 states and 1299 transitions. [2024-11-13 14:55:23,901 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 19 states have internal predecessors, (43), 8 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2024-11-13 14:55:23,901 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1299 transitions. [2024-11-13 14:55:23,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-13 14:55:23,902 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:55:23,903 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:55:23,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-13 14:55:24,103 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-13 14:55:24,104 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:55:24,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:55:24,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1448361150, now seen corresponding path program 1 times [2024-11-13 14:55:24,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:55:24,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614060701] [2024-11-13 14:55:24,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:55:24,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:55:24,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 14:55:24,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1992440716] [2024-11-13 14:55:24,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:55:24,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:55:24,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:55:24,147 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:55:24,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-13 14:55:24,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:55:24,232 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-13 14:55:24,234 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:55:25,384 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 24 proven. 23 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2024-11-13 14:55:25,384 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:55:27,429 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2024-11-13 14:55:27,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:55:27,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614060701] [2024-11-13 14:55:27,429 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 14:55:27,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992440716] [2024-11-13 14:55:27,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992440716] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:55:27,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:55:27,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-11-13 14:55:27,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587176077] [2024-11-13 14:55:27,430 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 14:55:27,431 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-13 14:55:27,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:55:27,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-13 14:55:27,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2024-11-13 14:55:27,432 INFO L87 Difference]: Start difference. First operand 828 states and 1299 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 20 states have internal predecessors, (53), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2024-11-13 14:55:44,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:55:44,324 INFO L93 Difference]: Finished difference Result 1111 states and 1744 transitions. [2024-11-13 14:55:44,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-13 14:55:44,325 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 20 states have internal predecessors, (53), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 90 [2024-11-13 14:55:44,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:55:44,334 INFO L225 Difference]: With dead ends: 1111 [2024-11-13 14:55:44,334 INFO L226 Difference]: Without dead ends: 1109 [2024-11-13 14:55:44,336 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=711, Invalid=2828, Unknown=1, NotChecked=0, Total=3540 [2024-11-13 14:55:44,337 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 168 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-11-13 14:55:44,338 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 620 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2024-11-13 14:55:44,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2024-11-13 14:55:45,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 1024. [2024-11-13 14:55:45,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 529 states have (on average 1.2967863894139886) internal successors, (686), 530 states have internal predecessors, (686), 465 states have call successors, (465), 29 states have call predecessors, (465), 29 states have return successors, (464), 464 states have call predecessors, (464), 464 states have call successors, (464) [2024-11-13 14:55:45,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1615 transitions. [2024-11-13 14:55:45,872 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1615 transitions. Word has length 90 [2024-11-13 14:55:45,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:55:45,872 INFO L471 AbstractCegarLoop]: Abstraction has 1024 states and 1615 transitions. [2024-11-13 14:55:45,873 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 20 states have internal predecessors, (53), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2024-11-13 14:55:45,873 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1615 transitions. [2024-11-13 14:55:45,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-13 14:55:45,875 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:55:45,876 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:55:45,898 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-13 14:55:46,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-13 14:55:46,076 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:55:46,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:55:46,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1501053468, now seen corresponding path program 2 times [2024-11-13 14:55:46,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:55:46,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382056861] [2024-11-13 14:55:46,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:55:46,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:55:46,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:55:46,416 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 14:55:46,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:55:46,419 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-13 14:55:46,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:55:46,422 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-13 14:55:46,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:55:46,425 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-13 14:55:46,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:55:46,428 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-13 14:55:46,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:55:46,434 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-11-13 14:55:46,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:55:46,441 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-11-13 14:55:46,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:55:46,447 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-11-13 14:55:46,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:55:46,453 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-11-13 14:55:46,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:55:46,459 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-11-13 14:55:46,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:55:46,464 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-11-13 14:55:46,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:55:46,473 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-11-13 14:55:46,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:55:46,480 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-11-13 14:55:46,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:55:46,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382056861] [2024-11-13 14:55:46,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382056861] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:55:46,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631546205] [2024-11-13 14:55:46,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:55:46,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:55:46,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:55:46,485 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:55:46,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-13 14:55:46,585 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:55:46,586 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:55:46,587 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 14:55:46,589 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:55:46,707 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-11-13 14:55:46,707 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:55:46,999 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-11-13 14:55:47,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631546205] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:55:47,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:55:47,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 11 [2024-11-13 14:55:47,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801736334] [2024-11-13 14:55:47,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:55:47,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 14:55:47,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:55:47,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 14:55:47,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-11-13 14:55:47,002 INFO L87 Difference]: Start difference. First operand 1024 states and 1615 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-13 14:55:49,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:55:49,923 INFO L93 Difference]: Finished difference Result 1136 states and 1784 transitions. [2024-11-13 14:55:49,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-13 14:55:49,924 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 95 [2024-11-13 14:55:49,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:55:49,946 INFO L225 Difference]: With dead ends: 1136 [2024-11-13 14:55:49,947 INFO L226 Difference]: Without dead ends: 1129 [2024-11-13 14:55:49,950 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 211 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2024-11-13 14:55:49,950 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 66 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 14:55:49,951 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 390 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 14:55:49,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2024-11-13 14:55:51,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 993. [2024-11-13 14:55:51,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 506 states have (on average 1.3043478260869565) internal successors, (660), 507 states have internal predecessors, (660), 457 states have call successors, (457), 29 states have call predecessors, (457), 29 states have return successors, (456), 456 states have call predecessors, (456), 456 states have call successors, (456) [2024-11-13 14:55:51,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 1573 transitions. [2024-11-13 14:55:51,761 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 1573 transitions. Word has length 95 [2024-11-13 14:55:51,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:55:51,762 INFO L471 AbstractCegarLoop]: Abstraction has 993 states and 1573 transitions. [2024-11-13 14:55:51,762 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-13 14:55:51,763 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 1573 transitions. [2024-11-13 14:55:51,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-13 14:55:51,766 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:55:51,766 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:55:51,795 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-13 14:55:51,966 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:55:51,967 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:55:51,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:55:51,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1528950009, now seen corresponding path program 4 times [2024-11-13 14:55:51,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:55:51,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652014931] [2024-11-13 14:55:51,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:55:51,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:55:52,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 14:55:52,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [550809414] [2024-11-13 14:55:52,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 14:55:52,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:55:52,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:55:52,009 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:55:52,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-13 14:55:52,130 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 14:55:52,130 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:55:52,137 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-13 14:55:52,142 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:55:54,106 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-11-13 14:55:54,106 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:55:58,199 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 43 proven. 39 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-11-13 14:55:58,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:55:58,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652014931] [2024-11-13 14:55:58,199 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 14:55:58,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550809414] [2024-11-13 14:55:58,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550809414] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:55:58,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:55:58,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2024-11-13 14:55:58,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616825437] [2024-11-13 14:55:58,199 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 14:55:58,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-13 14:55:58,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:55:58,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-13 14:55:58,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2024-11-13 14:55:58,201 INFO L87 Difference]: Start difference. First operand 993 states and 1573 transitions. Second operand has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 28 states have internal predecessors, (69), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2024-11-13 14:56:08,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:56:08,506 INFO L93 Difference]: Finished difference Result 1155 states and 1783 transitions. [2024-11-13 14:56:08,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-13 14:56:08,507 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 28 states have internal predecessors, (69), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) Word has length 98 [2024-11-13 14:56:08,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:56:08,516 INFO L225 Difference]: With dead ends: 1155 [2024-11-13 14:56:08,516 INFO L226 Difference]: Without dead ends: 1153 [2024-11-13 14:56:08,518 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 163 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=656, Invalid=2884, Unknown=0, NotChecked=0, Total=3540 [2024-11-13 14:56:08,518 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 164 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2024-11-13 14:56:08,522 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 614 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2024-11-13 14:56:08,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2024-11-13 14:56:10,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1051. [2024-11-13 14:56:10,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 551 states have (on average 1.281306715063521) internal successors, (706), 554 states have internal predecessors, (706), 461 states have call successors, (461), 38 states have call predecessors, (461), 38 states have return successors, (460), 458 states have call predecessors, (460), 460 states have call successors, (460) [2024-11-13 14:56:10,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1627 transitions. [2024-11-13 14:56:10,444 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1627 transitions. Word has length 98 [2024-11-13 14:56:10,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:56:10,445 INFO L471 AbstractCegarLoop]: Abstraction has 1051 states and 1627 transitions. [2024-11-13 14:56:10,445 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 28 states have internal predecessors, (69), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2024-11-13 14:56:10,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1627 transitions. [2024-11-13 14:56:10,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-13 14:56:10,449 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:56:10,449 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:56:10,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-13 14:56:10,649 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:56:10,650 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:56:10,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:56:10,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1265837621, now seen corresponding path program 2 times [2024-11-13 14:56:10,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:56:10,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415720858] [2024-11-13 14:56:10,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:56:10,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:56:10,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 14:56:10,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1813877795] [2024-11-13 14:56:10,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:56:10,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:56:10,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:56:10,700 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:56:10,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-13 14:56:10,883 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:56:10,884 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:56:10,887 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-13 14:56:10,893 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:56:12,665 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-11-13 14:56:12,665 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:56:16,451 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-11-13 14:56:16,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:56:16,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415720858] [2024-11-13 14:56:16,451 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 14:56:16,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813877795] [2024-11-13 14:56:16,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813877795] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:56:16,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:56:16,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2024-11-13 14:56:16,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652623742] [2024-11-13 14:56:16,452 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 14:56:16,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-13 14:56:16,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:56:16,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-13 14:56:16,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2024-11-13 14:56:16,454 INFO L87 Difference]: Start difference. First operand 1051 states and 1627 transitions. Second operand has 22 states, 20 states have (on average 2.3) internal successors, (46), 21 states have internal predecessors, (46), 9 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2024-11-13 14:56:39,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:56:39,962 INFO L93 Difference]: Finished difference Result 1239 states and 1901 transitions. [2024-11-13 14:56:39,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-13 14:56:39,963 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.3) internal successors, (46), 21 states have internal predecessors, (46), 9 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) Word has length 104 [2024-11-13 14:56:39,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:56:39,972 INFO L225 Difference]: With dead ends: 1239 [2024-11-13 14:56:39,972 INFO L226 Difference]: Without dead ends: 1231 [2024-11-13 14:56:39,974 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 184 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=994, Invalid=3698, Unknown=0, NotChecked=0, Total=4692 [2024-11-13 14:56:39,975 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 200 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2024-11-13 14:56:39,976 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 721 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2024-11-13 14:56:39,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1231 states. [2024-11-13 14:56:42,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1231 to 1205. [2024-11-13 14:56:42,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 636 states have (on average 1.2814465408805031) internal successors, (815), 639 states have internal predecessors, (815), 525 states have call successors, (525), 43 states have call predecessors, (525), 43 states have return successors, (524), 522 states have call predecessors, (524), 524 states have call successors, (524) [2024-11-13 14:56:42,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 1864 transitions. [2024-11-13 14:56:42,165 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 1864 transitions. Word has length 104 [2024-11-13 14:56:42,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:56:42,166 INFO L471 AbstractCegarLoop]: Abstraction has 1205 states and 1864 transitions. [2024-11-13 14:56:42,166 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.3) internal successors, (46), 21 states have internal predecessors, (46), 9 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2024-11-13 14:56:42,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 1864 transitions. [2024-11-13 14:56:42,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-13 14:56:42,169 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:56:42,169 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:56:42,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-13 14:56:42,374 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-13 14:56:42,374 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:56:42,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:56:42,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1369760889, now seen corresponding path program 3 times [2024-11-13 14:56:42,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:56:42,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123615507] [2024-11-13 14:56:42,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:56:42,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:56:42,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 14:56:42,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1616647824] [2024-11-13 14:56:42,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:56:42,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:56:42,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:56:42,410 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:56:42,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-13 14:56:42,550 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-13 14:56:42,551 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:56:42,553 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-13 14:56:42,555 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:56:44,161 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-11-13 14:56:44,162 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:56:47,627 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-11-13 14:56:47,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:56:47,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123615507] [2024-11-13 14:56:47,628 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 14:56:47,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616647824] [2024-11-13 14:56:47,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616647824] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:56:47,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:56:47,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2024-11-13 14:56:47,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282123684] [2024-11-13 14:56:47,628 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 14:56:47,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-13 14:56:47,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:56:47,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-13 14:56:47,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2024-11-13 14:56:47,630 INFO L87 Difference]: Start difference. First operand 1205 states and 1864 transitions. Second operand has 22 states, 20 states have (on average 2.6) internal successors, (52), 21 states have internal predecessors, (52), 9 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2024-11-13 14:56:58,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:56:58,636 INFO L93 Difference]: Finished difference Result 1489 states and 2303 transitions. [2024-11-13 14:56:58,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-13 14:56:58,637 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.6) internal successors, (52), 21 states have internal predecessors, (52), 9 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) Word has length 107 [2024-11-13 14:56:58,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:56:58,648 INFO L225 Difference]: With dead ends: 1489 [2024-11-13 14:56:58,648 INFO L226 Difference]: Without dead ends: 1481 [2024-11-13 14:56:58,650 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 190 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=579, Invalid=2391, Unknown=0, NotChecked=0, Total=2970 [2024-11-13 14:56:58,652 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 227 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2024-11-13 14:56:58,652 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 650 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2024-11-13 14:56:58,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2024-11-13 14:57:01,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1310. [2024-11-13 14:57:01,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310 states, 689 states have (on average 1.2801161103047896) internal successors, (882), 692 states have internal predecessors, (882), 573 states have call successors, (573), 47 states have call predecessors, (573), 47 states have return successors, (572), 570 states have call predecessors, (572), 572 states have call successors, (572) [2024-11-13 14:57:01,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 2027 transitions. [2024-11-13 14:57:01,216 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 2027 transitions. Word has length 107 [2024-11-13 14:57:01,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:57:01,217 INFO L471 AbstractCegarLoop]: Abstraction has 1310 states and 2027 transitions. [2024-11-13 14:57:01,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.6) internal successors, (52), 21 states have internal predecessors, (52), 9 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2024-11-13 14:57:01,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 2027 transitions. [2024-11-13 14:57:01,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-11-13 14:57:01,219 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:57:01,219 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:57:01,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-13 14:57:01,420 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-13 14:57:01,420 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:57:01,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:57:01,421 INFO L85 PathProgramCache]: Analyzing trace with hash -241342456, now seen corresponding path program 2 times [2024-11-13 14:57:01,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:57:01,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544443710] [2024-11-13 14:57:01,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:57:01,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:57:01,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 14:57:01,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [162260428] [2024-11-13 14:57:01,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:57:01,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:57:01,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:57:01,458 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:57:01,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-13 14:57:01,596 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:57:01,596 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:57:01,605 INFO L255 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-11-13 14:57:01,610 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:57:05,118 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 58 proven. 62 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-11-13 14:57:05,118 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:57:19,066 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 56 proven. 52 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2024-11-13 14:57:19,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:57:19,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544443710] [2024-11-13 14:57:19,066 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 14:57:19,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162260428] [2024-11-13 14:57:19,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162260428] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:57:19,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:57:19,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17] total 36 [2024-11-13 14:57:19,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046853308] [2024-11-13 14:57:19,067 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 14:57:19,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-13 14:57:19,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:57:19,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-13 14:57:19,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2024-11-13 14:57:19,069 INFO L87 Difference]: Start difference. First operand 1310 states and 2027 transitions. Second operand has 36 states, 35 states have (on average 2.057142857142857) internal successors, (72), 33 states have internal predecessors, (72), 13 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (33), 13 states have call predecessors, (33), 13 states have call successors, (33) [2024-11-13 14:57:55,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:57:55,397 INFO L93 Difference]: Finished difference Result 1553 states and 2372 transitions. [2024-11-13 14:57:55,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-11-13 14:57:55,398 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.057142857142857) internal successors, (72), 33 states have internal predecessors, (72), 13 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (33), 13 states have call predecessors, (33), 13 states have call successors, (33) Word has length 117 [2024-11-13 14:57:55,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:57:55,415 INFO L225 Difference]: With dead ends: 1553 [2024-11-13 14:57:55,415 INFO L226 Difference]: Without dead ends: 1551 [2024-11-13 14:57:55,420 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1658 ImplicationChecksByTransitivity, 30.6s TimeCoverageRelationStatistics Valid=1304, Invalid=5502, Unknown=0, NotChecked=0, Total=6806 [2024-11-13 14:57:55,421 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 277 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 1330 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 1619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 1330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2024-11-13 14:57:55,421 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 987 Invalid, 1619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 1330 Invalid, 0 Unknown, 0 Unchecked, 10.2s Time] [2024-11-13 14:57:55,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1551 states. [2024-11-13 14:57:59,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1551 to 1521. [2024-11-13 14:57:59,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 822 states have (on average 1.2737226277372262) internal successors, (1047), 829 states have internal predecessors, (1047), 645 states have call successors, (645), 53 states have call predecessors, (645), 53 states have return successors, (644), 638 states have call predecessors, (644), 644 states have call successors, (644) [2024-11-13 14:57:59,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 2336 transitions. [2024-11-13 14:57:59,363 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 2336 transitions. Word has length 117 [2024-11-13 14:57:59,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:57:59,364 INFO L471 AbstractCegarLoop]: Abstraction has 1521 states and 2336 transitions. [2024-11-13 14:57:59,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.057142857142857) internal successors, (72), 33 states have internal predecessors, (72), 13 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (33), 13 states have call predecessors, (33), 13 states have call successors, (33) [2024-11-13 14:57:59,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 2336 transitions. [2024-11-13 14:57:59,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-11-13 14:57:59,366 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:57:59,366 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:57:59,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-13 14:57:59,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-13 14:57:59,568 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:57:59,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:57:59,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1869887331, now seen corresponding path program 4 times [2024-11-13 14:57:59,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:57:59,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228821919] [2024-11-13 14:57:59,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:57:59,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:57:59,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 14:57:59,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1491895572] [2024-11-13 14:57:59,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 14:57:59,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:57:59,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:57:59,630 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:57:59,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75bd1ae7-383c-4576-b011-5bcc942ee915/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-13 14:57:59,741 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 14:57:59,741 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:57:59,745 INFO L255 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-11-13 14:57:59,750 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:58:03,261 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 56 proven. 64 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2024-11-13 14:58:03,261 INFO L311 TraceCheckSpWp]: Computing backward predicates...