./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ca2134f8a32f49a0943527ee47fd89b4eb01286294fd09a8197c7c707de74c1d --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 05:09:43,185 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 05:09:43,244 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 05:09:43,249 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 05:09:43,249 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 05:09:43,292 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 05:09:43,295 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 05:09:43,295 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 05:09:43,296 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 05:09:43,296 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 05:09:43,296 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 05:09:43,297 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 05:09:43,297 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 05:09:43,297 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 05:09:43,298 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 05:09:43,299 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 05:09:43,299 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 05:09:43,299 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 05:09:43,299 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 05:09:43,299 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 05:09:43,300 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 05:09:43,300 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 05:09:43,300 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 05:09:43,300 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 05:09:43,301 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 05:09:43,301 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 05:09:43,301 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 05:09:43,301 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 05:09:43,301 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 05:09:43,301 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:09:43,301 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:09:43,302 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:09:43,302 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:09:43,302 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 05:09:43,302 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:09:43,302 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:09:43,302 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:09:43,302 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:09:43,302 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 05:09:43,302 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 05:09:43,302 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 05:09:43,302 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 05:09:43,303 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 05:09:43,303 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 05:09:43,303 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 05:09:43,303 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 05:09:43,303 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 05:09:43,303 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 05:09:43,303 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_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca2134f8a32f49a0943527ee47fd89b4eb01286294fd09a8197c7c707de74c1d [2024-11-28 05:09:43,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 05:09:43,654 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 05:09:43,659 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 05:09:43,661 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 05:09:43,661 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 05:09:43,662 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.c [2024-11-28 05:09:46,868 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/data/f5fa90a25/81eebbe8c2224a4296673d6c966759b8/FLAGa22fe945c [2024-11-28 05:09:47,153 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 05:09:47,154 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.c [2024-11-28 05:09:47,166 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/data/f5fa90a25/81eebbe8c2224a4296673d6c966759b8/FLAGa22fe945c [2024-11-28 05:09:47,187 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/data/f5fa90a25/81eebbe8c2224a4296673d6c966759b8 [2024-11-28 05:09:47,189 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 05:09:47,191 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 05:09:47,193 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 05:09:47,193 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 05:09:47,201 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 05:09:47,202 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:09:47" (1/1) ... [2024-11-28 05:09:47,203 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3031e6f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:09:47, skipping insertion in model container [2024-11-28 05:09:47,203 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:09:47" (1/1) ... [2024-11-28 05:09:47,221 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 05:09:47,418 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_b419e351-b430-445b-837c-7815f1804312/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.c[535,548] [2024-11-28 05:09:47,465 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:09:47,483 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 05:09:47,498 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_b419e351-b430-445b-837c-7815f1804312/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.c[535,548] [2024-11-28 05:09:47,520 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:09:47,543 INFO L204 MainTranslator]: Completed translation [2024-11-28 05:09:47,544 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:09:47 WrapperNode [2024-11-28 05:09:47,546 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 05:09:47,547 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 05:09:47,547 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 05:09:47,548 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 05:09:47,563 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:09:47" (1/1) ... [2024-11-28 05:09:47,573 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:09:47" (1/1) ... [2024-11-28 05:09:47,597 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 65 [2024-11-28 05:09:47,600 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 05:09:47,601 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 05:09:47,601 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 05:09:47,601 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 05:09:47,614 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:09:47" (1/1) ... [2024-11-28 05:09:47,614 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:09:47" (1/1) ... [2024-11-28 05:09:47,621 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:09:47" (1/1) ... [2024-11-28 05:09:47,646 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-28 05:09:47,646 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:09:47" (1/1) ... [2024-11-28 05:09:47,646 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:09:47" (1/1) ... [2024-11-28 05:09:47,649 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:09:47" (1/1) ... [2024-11-28 05:09:47,653 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:09:47" (1/1) ... [2024-11-28 05:09:47,657 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:09:47" (1/1) ... [2024-11-28 05:09:47,662 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:09:47" (1/1) ... [2024-11-28 05:09:47,663 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:09:47" (1/1) ... [2024-11-28 05:09:47,668 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 05:09:47,669 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 05:09:47,669 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 05:09:47,669 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 05:09:47,670 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:09:47" (1/1) ... [2024-11-28 05:09:47,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:09:47,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:09:47,714 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 05:09:47,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 05:09:47,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 05:09:47,751 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-28 05:09:47,751 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-28 05:09:47,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 05:09:47,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 05:09:47,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 05:09:47,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-28 05:09:47,752 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-28 05:09:47,829 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 05:09:47,831 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 05:09:48,020 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-11-28 05:09:48,020 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 05:09:48,040 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 05:09:48,041 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-28 05:09:48,042 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:09:48 BoogieIcfgContainer [2024-11-28 05:09:48,042 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 05:09:48,045 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 05:09:48,045 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 05:09:48,051 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 05:09:48,051 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:09:47" (1/3) ... [2024-11-28 05:09:48,052 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@313eef5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:09:48, skipping insertion in model container [2024-11-28 05:09:48,052 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:09:47" (2/3) ... [2024-11-28 05:09:48,052 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@313eef5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:09:48, skipping insertion in model container [2024-11-28 05:09:48,052 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:09:48" (3/3) ... [2024-11-28 05:09:48,053 INFO L128 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound50.c [2024-11-28 05:09:48,073 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 05:09:48,076 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fermat1-ll_unwindbound50.c that has 3 procedures, 32 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-28 05:09:48,154 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 05:09:48,176 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;@fb1dcdd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 05:09:48,176 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-28 05:09:48,181 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 05:09:48,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-28 05:09:48,196 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:09:48,197 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:09:48,197 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:09:48,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:09:48,206 INFO L85 PathProgramCache]: Analyzing trace with hash 738208203, now seen corresponding path program 1 times [2024-11-28 05:09:48,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:09:48,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281848849] [2024-11-28 05:09:48,218 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:09:48,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:09:48,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:09:48,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:09:48,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:09:48,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281848849] [2024-11-28 05:09:48,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281848849] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:09:48,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466408780] [2024-11-28 05:09:48,372 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:09:48,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:09:48,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:09:48,378 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:09:48,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 05:09:48,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:09:48,477 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-28 05:09:48,481 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:09:48,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:09:48,492 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:09:48,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466408780] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:09:48,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:09:48,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-11-28 05:09:48,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604413361] [2024-11-28 05:09:48,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:09:48,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-28 05:09:48,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:09:48,527 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-28 05:09:48,527 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 05:09:48,529 INFO L87 Difference]: Start difference. First operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:09:48,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:09:48,552 INFO L93 Difference]: Finished difference Result 61 states and 94 transitions. [2024-11-28 05:09:48,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-28 05:09:48,554 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2024-11-28 05:09:48,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:09:48,562 INFO L225 Difference]: With dead ends: 61 [2024-11-28 05:09:48,562 INFO L226 Difference]: Without dead ends: 28 [2024-11-28 05:09:48,566 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 05:09:48,570 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:09:48,571 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 05:09:48,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-28 05:09:48,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-28 05:09:48,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-28 05:09:48,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2024-11-28 05:09:48,616 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 18 [2024-11-28 05:09:48,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:09:48,616 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2024-11-28 05:09:48,617 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:09:48,617 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2024-11-28 05:09:48,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-28 05:09:48,619 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:09:48,619 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:09:48,626 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 05:09:48,820 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-28 05:09:48,820 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:09:48,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:09:48,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1800491340, now seen corresponding path program 1 times [2024-11-28 05:09:48,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:09:48,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948601550] [2024-11-28 05:09:48,821 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:09:48,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:09:48,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 05:09:48,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [620529501] [2024-11-28 05:09:48,870 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:09:48,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:09:48,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:09:48,873 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:09:48,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 05:09:48,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:09:48,972 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 05:09:48,980 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:09:49,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:09:49,392 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:09:49,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:09:49,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948601550] [2024-11-28 05:09:49,393 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:09:49,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620529501] [2024-11-28 05:09:49,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620529501] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:09:49,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:09:49,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 05:09:49,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136469164] [2024-11-28 05:09:49,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:09:49,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:09:49,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:09:49,395 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:09:49,395 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:09:49,396 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:09:51,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 05:09:51,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:09:51,490 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2024-11-28 05:09:51,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:09:51,491 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2024-11-28 05:09:51,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:09:51,492 INFO L225 Difference]: With dead ends: 47 [2024-11-28 05:09:51,492 INFO L226 Difference]: Without dead ends: 45 [2024-11-28 05:09:51,492 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 05:09:51,493 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 13 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:09:51,494 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 101 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-28 05:09:51,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-28 05:09:51,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2024-11-28 05:09:51,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 32 states have internal predecessors, (44), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-28 05:09:51,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 61 transitions. [2024-11-28 05:09:51,509 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 61 transitions. Word has length 19 [2024-11-28 05:09:51,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:09:51,509 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 61 transitions. [2024-11-28 05:09:51,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:09:51,509 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 61 transitions. [2024-11-28 05:09:51,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-28 05:09:51,510 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:09:51,510 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:09:51,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 05:09:51,711 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:09:51,711 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:09:51,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:09:51,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1798465552, now seen corresponding path program 1 times [2024-11-28 05:09:51,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:09:51,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560941010] [2024-11-28 05:09:51,712 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:09:51,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:09:51,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:09:51,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:09:51,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:09:51,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560941010] [2024-11-28 05:09:51,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560941010] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:09:51,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:09:51,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:09:51,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55245562] [2024-11-28 05:09:51,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:09:51,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:09:51,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:09:51,896 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:09:51,896 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:09:51,896 INFO L87 Difference]: Start difference. First operand 44 states and 61 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:09:51,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:09:51,931 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2024-11-28 05:09:51,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:09:51,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2024-11-28 05:09:51,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:09:51,933 INFO L225 Difference]: With dead ends: 53 [2024-11-28 05:09:51,934 INFO L226 Difference]: Without dead ends: 46 [2024-11-28 05:09:51,934 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:09:51,935 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 5 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:09:51,935 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 91 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 05:09:51,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-28 05:09:51,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-11-28 05:09:51,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.393939393939394) internal successors, (46), 34 states have internal predecessors, (46), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-28 05:09:51,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2024-11-28 05:09:51,964 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 19 [2024-11-28 05:09:51,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:09:51,965 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2024-11-28 05:09:51,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:09:51,965 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2024-11-28 05:09:51,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-28 05:09:51,966 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:09:51,966 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:09:51,966 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 05:09:51,966 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:09:51,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:09:51,967 INFO L85 PathProgramCache]: Analyzing trace with hash 884762201, now seen corresponding path program 1 times [2024-11-28 05:09:51,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:09:51,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491422786] [2024-11-28 05:09:51,967 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:09:51,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:09:51,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:09:52,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:09:52,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:09:52,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491422786] [2024-11-28 05:09:52,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491422786] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:09:52,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036714093] [2024-11-28 05:09:52,445 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:09:52,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:09:52,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:09:52,447 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:09:52,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 05:09:52,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:09:52,508 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 05:09:52,510 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:09:52,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:09:52,629 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:09:52,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:09:52,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036714093] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:09:52,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:09:52,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 12 [2024-11-28 05:09:52,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710576381] [2024-11-28 05:09:52,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:09:52,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 05:09:52,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:09:52,834 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 05:09:52,835 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-11-28 05:09:52,835 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-28 05:09:53,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:09:53,013 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2024-11-28 05:09:53,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 05:09:53,014 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 25 [2024-11-28 05:09:53,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:09:53,015 INFO L225 Difference]: With dead ends: 53 [2024-11-28 05:09:53,015 INFO L226 Difference]: Without dead ends: 48 [2024-11-28 05:09:53,016 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-28 05:09:53,016 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:09:53,017 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 133 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:09:53,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-28 05:09:53,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 32. [2024-11-28 05:09:53,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-28 05:09:53,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2024-11-28 05:09:53,033 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 25 [2024-11-28 05:09:53,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:09:53,033 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2024-11-28 05:09:53,033 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-28 05:09:53,034 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2024-11-28 05:09:53,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-28 05:09:53,034 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:09:53,034 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:09:53,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 05:09:53,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:09:53,235 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:09:53,236 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:09:53,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1887642954, now seen corresponding path program 1 times [2024-11-28 05:09:53,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:09:53,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934102750] [2024-11-28 05:09:53,236 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:09:53,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:09:53,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:09:53,367 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:09:53,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:09:53,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934102750] [2024-11-28 05:09:53,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934102750] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:09:53,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:09:53,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 05:09:53,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686870814] [2024-11-28 05:09:53,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:09:53,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:09:53,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:09:53,370 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:09:53,370 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:09:53,370 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 05:09:53,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:09:53,440 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2024-11-28 05:09:53,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:09:53,441 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2024-11-28 05:09:53,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:09:53,442 INFO L225 Difference]: With dead ends: 61 [2024-11-28 05:09:53,442 INFO L226 Difference]: Without dead ends: 40 [2024-11-28 05:09:53,447 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:09:53,448 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 12 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:09:53,448 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 91 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 05:09:53,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-28 05:09:53,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-11-28 05:09:53,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 05:09:53,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2024-11-28 05:09:53,469 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 31 [2024-11-28 05:09:53,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:09:53,469 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2024-11-28 05:09:53,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 05:09:53,470 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2024-11-28 05:09:53,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-28 05:09:53,471 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:09:53,471 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:09:53,471 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 05:09:53,472 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:09:53,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:09:53,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1075457857, now seen corresponding path program 1 times [2024-11-28 05:09:53,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:09:53,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050108456] [2024-11-28 05:09:53,472 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:09:53,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:09:53,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:09:53,622 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 05:09:53,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:09:53,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050108456] [2024-11-28 05:09:53,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050108456] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:09:53,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:09:53,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 05:09:53,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873823955] [2024-11-28 05:09:53,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:09:53,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 05:09:53,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:09:53,625 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 05:09:53,625 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-28 05:09:53,625 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 05:09:53,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:09:53,700 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2024-11-28 05:09:53,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 05:09:53,700 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2024-11-28 05:09:53,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:09:53,702 INFO L225 Difference]: With dead ends: 70 [2024-11-28 05:09:53,702 INFO L226 Difference]: Without dead ends: 49 [2024-11-28 05:09:53,702 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-28 05:09:53,703 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 23 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:09:53,704 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 95 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 05:09:53,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-28 05:09:53,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2024-11-28 05:09:53,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-28 05:09:53,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2024-11-28 05:09:53,725 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 37 [2024-11-28 05:09:53,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:09:53,726 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2024-11-28 05:09:53,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 05:09:53,726 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2024-11-28 05:09:53,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-28 05:09:53,727 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:09:53,727 INFO L218 NwaCegarLoop]: trace histogram [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, 1] [2024-11-28 05:09:53,728 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-28 05:09:53,728 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:09:53,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:09:53,728 INFO L85 PathProgramCache]: Analyzing trace with hash 674693734, now seen corresponding path program 1 times [2024-11-28 05:09:53,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:09:53,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249581083] [2024-11-28 05:09:53,729 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:09:53,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:09:53,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:09:53,838 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 05:09:53,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:09:53,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249581083] [2024-11-28 05:09:53,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249581083] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:09:53,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344954366] [2024-11-28 05:09:53,838 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:09:53,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:09:53,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:09:53,841 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:09:53,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 05:09:53,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:09:53,907 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 05:09:53,911 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:09:54,000 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:09:54,001 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:09:54,106 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 05:09:54,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344954366] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:09:54,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:09:54,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2024-11-28 05:09:54,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207147331] [2024-11-28 05:09:54,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:09:54,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 05:09:54,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:09:54,108 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 05:09:54,108 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-11-28 05:09:54,109 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-28 05:09:54,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:09:54,389 INFO L93 Difference]: Finished difference Result 125 states and 156 transitions. [2024-11-28 05:09:54,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 05:09:54,390 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 39 [2024-11-28 05:09:54,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:09:54,391 INFO L225 Difference]: With dead ends: 125 [2024-11-28 05:09:54,391 INFO L226 Difference]: Without dead ends: 104 [2024-11-28 05:09:54,391 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2024-11-28 05:09:54,392 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 64 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:09:54,395 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 141 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:09:54,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-28 05:09:54,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 91. [2024-11-28 05:09:54,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 68 states have internal predecessors, (82), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-28 05:09:54,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 113 transitions. [2024-11-28 05:09:54,461 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 113 transitions. Word has length 39 [2024-11-28 05:09:54,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:09:54,461 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 113 transitions. [2024-11-28 05:09:54,462 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-28 05:09:54,463 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 113 transitions. [2024-11-28 05:09:54,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-28 05:09:54,466 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:09:54,466 INFO L218 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1] [2024-11-28 05:09:54,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 05:09:54,667 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:09:54,669 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:09:54,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:09:54,670 INFO L85 PathProgramCache]: Analyzing trace with hash -126912254, now seen corresponding path program 1 times [2024-11-28 05:09:54,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:09:54,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135727040] [2024-11-28 05:09:54,670 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:09:54,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:09:54,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:09:54,778 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 05:09:54,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:09:54,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135727040] [2024-11-28 05:09:54,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135727040] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:09:54,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:09:54,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:09:54,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528114537] [2024-11-28 05:09:54,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:09:54,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:09:54,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:09:54,781 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:09:54,781 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:09:54,781 INFO L87 Difference]: Start difference. First operand 91 states and 113 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-28 05:09:54,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:09:54,883 INFO L93 Difference]: Finished difference Result 154 states and 198 transitions. [2024-11-28 05:09:54,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:09:54,884 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 43 [2024-11-28 05:09:54,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:09:54,887 INFO L225 Difference]: With dead ends: 154 [2024-11-28 05:09:54,888 INFO L226 Difference]: Without dead ends: 115 [2024-11-28 05:09:54,889 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:09:54,890 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 20 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:09:54,891 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 87 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 05:09:54,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-11-28 05:09:54,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2024-11-28 05:09:54,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 78 states have (on average 1.2307692307692308) internal successors, (96), 79 states have internal predecessors, (96), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2024-11-28 05:09:54,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 133 transitions. [2024-11-28 05:09:54,959 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 133 transitions. Word has length 43 [2024-11-28 05:09:54,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:09:54,959 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 133 transitions. [2024-11-28 05:09:54,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-28 05:09:54,960 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 133 transitions. [2024-11-28 05:09:54,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-28 05:09:54,964 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:09:54,964 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1] [2024-11-28 05:09:54,964 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-28 05:09:54,964 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:09:54,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:09:54,965 INFO L85 PathProgramCache]: Analyzing trace with hash -38739799, now seen corresponding path program 1 times [2024-11-28 05:09:54,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:09:54,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796057407] [2024-11-28 05:09:54,965 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:09:54,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:09:54,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:09:55,202 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 05:09:55,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:09:55,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796057407] [2024-11-28 05:09:55,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796057407] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:09:55,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96784221] [2024-11-28 05:09:55,204 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:09:55,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:09:55,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:09:55,207 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:09:55,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 05:09:55,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:09:55,270 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 05:09:55,272 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:09:55,362 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:09:55,362 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:09:55,510 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 05:09:55,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96784221] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:09:55,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:09:55,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2024-11-28 05:09:55,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491492473] [2024-11-28 05:09:55,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:09:55,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 05:09:55,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:09:55,512 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 05:09:55,513 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2024-11-28 05:09:55,513 INFO L87 Difference]: Start difference. First operand 105 states and 133 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2024-11-28 05:09:55,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:09:55,843 INFO L93 Difference]: Finished difference Result 215 states and 279 transitions. [2024-11-28 05:09:55,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 05:09:55,844 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) Word has length 45 [2024-11-28 05:09:55,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:09:55,846 INFO L225 Difference]: With dead ends: 215 [2024-11-28 05:09:55,846 INFO L226 Difference]: Without dead ends: 168 [2024-11-28 05:09:55,847 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2024-11-28 05:09:55,848 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 75 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:09:55,848 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 162 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:09:55,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-11-28 05:09:55,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 149. [2024-11-28 05:09:55,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 111 states have (on average 1.2432432432432432) internal successors, (138), 112 states have internal predecessors, (138), 28 states have call successors, (28), 10 states have call predecessors, (28), 9 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2024-11-28 05:09:55,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 193 transitions. [2024-11-28 05:09:55,923 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 193 transitions. Word has length 45 [2024-11-28 05:09:55,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:09:55,923 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 193 transitions. [2024-11-28 05:09:55,924 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2024-11-28 05:09:55,924 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 193 transitions. [2024-11-28 05:09:55,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-28 05:09:55,925 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:09:55,925 INFO L218 NwaCegarLoop]: trace histogram [5, 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, 1, 1] [2024-11-28 05:09:55,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 05:09:56,125 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:09:56,126 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:09:56,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:09:56,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1239773548, now seen corresponding path program 1 times [2024-11-28 05:09:56,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:09:56,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639966765] [2024-11-28 05:09:56,128 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:09:56,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:09:56,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:09:56,380 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-28 05:09:56,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:09:56,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639966765] [2024-11-28 05:09:56,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639966765] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:09:56,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097250657] [2024-11-28 05:09:56,381 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:09:56,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:09:56,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:09:56,384 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:09:56,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 05:09:56,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:09:56,456 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 05:09:56,457 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:09:56,574 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:09:56,574 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:09:56,755 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-28 05:09:56,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097250657] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:09:56,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:09:56,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2024-11-28 05:09:56,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113327537] [2024-11-28 05:09:56,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:09:56,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 05:09:56,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:09:56,760 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 05:09:56,760 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-11-28 05:09:56,760 INFO L87 Difference]: Start difference. First operand 149 states and 193 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) [2024-11-28 05:09:57,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:09:57,216 INFO L93 Difference]: Finished difference Result 207 states and 274 transitions. [2024-11-28 05:09:57,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 05:09:57,217 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) Word has length 51 [2024-11-28 05:09:57,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:09:57,220 INFO L225 Difference]: With dead ends: 207 [2024-11-28 05:09:57,222 INFO L226 Difference]: Without dead ends: 202 [2024-11-28 05:09:57,222 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2024-11-28 05:09:57,223 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 149 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 05:09:57,226 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 171 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 05:09:57,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2024-11-28 05:09:57,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2024-11-28 05:09:57,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 144 states have (on average 1.2361111111111112) internal successors, (178), 148 states have internal predecessors, (178), 38 states have call successors, (38), 12 states have call predecessors, (38), 11 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2024-11-28 05:09:57,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 253 transitions. [2024-11-28 05:09:57,337 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 253 transitions. Word has length 51 [2024-11-28 05:09:57,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:09:57,337 INFO L471 AbstractCegarLoop]: Abstraction has 194 states and 253 transitions. [2024-11-28 05:09:57,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) [2024-11-28 05:09:57,338 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 253 transitions. [2024-11-28 05:09:57,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-28 05:09:57,345 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:09:57,346 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:09:57,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 05:09:57,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-28 05:09:57,547 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:09:57,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:09:57,547 INFO L85 PathProgramCache]: Analyzing trace with hash 777122842, now seen corresponding path program 1 times [2024-11-28 05:09:57,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:09:57,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966738856] [2024-11-28 05:09:57,548 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:09:57,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:09:57,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:09:58,027 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 24 proven. 40 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-11-28 05:09:58,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:09:58,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966738856] [2024-11-28 05:09:58,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966738856] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:09:58,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138545779] [2024-11-28 05:09:58,028 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:09:58,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:09:58,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:09:58,030 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:09:58,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 05:09:58,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:09:58,114 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 05:09:58,118 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:09:58,292 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 24 proven. 152 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:09:58,292 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:09:58,641 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 24 proven. 40 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-11-28 05:09:58,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138545779] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:09:58,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:09:58,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 22 [2024-11-28 05:09:58,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106788930] [2024-11-28 05:09:58,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:09:58,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 05:09:58,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:09:58,644 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 05:09:58,644 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2024-11-28 05:09:58,645 INFO L87 Difference]: Start difference. First operand 194 states and 253 transitions. Second operand has 22 states, 22 states have (on average 4.454545454545454) internal successors, (98), 22 states have internal predecessors, (98), 19 states have call successors, (31), 11 states have call predecessors, (31), 10 states have return successors, (30), 18 states have call predecessors, (30), 18 states have call successors, (30) [2024-11-28 05:09:59,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:09:59,725 INFO L93 Difference]: Finished difference Result 549 states and 749 transitions. [2024-11-28 05:09:59,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-28 05:09:59,726 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.454545454545454) internal successors, (98), 22 states have internal predecessors, (98), 19 states have call successors, (31), 11 states have call predecessors, (31), 10 states have return successors, (30), 18 states have call predecessors, (30), 18 states have call successors, (30) Word has length 87 [2024-11-28 05:09:59,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:09:59,731 INFO L225 Difference]: With dead ends: 549 [2024-11-28 05:09:59,731 INFO L226 Difference]: Without dead ends: 491 [2024-11-28 05:09:59,732 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=507, Invalid=899, Unknown=0, NotChecked=0, Total=1406 [2024-11-28 05:09:59,733 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 337 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 05:09:59,733 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 318 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 05:09:59,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2024-11-28 05:09:59,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 449. [2024-11-28 05:09:59,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 336 states have (on average 1.2470238095238095) internal successors, (419), 339 states have internal predecessors, (419), 93 states have call successors, (93), 20 states have call predecessors, (93), 19 states have return successors, (92), 89 states have call predecessors, (92), 92 states have call successors, (92) [2024-11-28 05:09:59,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 604 transitions. [2024-11-28 05:09:59,936 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 604 transitions. Word has length 87 [2024-11-28 05:09:59,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:09:59,937 INFO L471 AbstractCegarLoop]: Abstraction has 449 states and 604 transitions. [2024-11-28 05:09:59,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.454545454545454) internal successors, (98), 22 states have internal predecessors, (98), 19 states have call successors, (31), 11 states have call predecessors, (31), 10 states have return successors, (30), 18 states have call predecessors, (30), 18 states have call successors, (30) [2024-11-28 05:09:59,937 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 604 transitions. [2024-11-28 05:09:59,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-28 05:09:59,939 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:09:59,939 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 5, 5, 5, 4, 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] [2024-11-28 05:09:59,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 05:10:00,144 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-28 05:10:00,144 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:10:00,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:10:00,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1417240327, now seen corresponding path program 1 times [2024-11-28 05:10:00,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:10:00,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434346819] [2024-11-28 05:10:00,145 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:10:00,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:10:00,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:10:00,273 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2024-11-28 05:10:00,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:10:00,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434346819] [2024-11-28 05:10:00,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434346819] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:10:00,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:10:00,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:10:00,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443389223] [2024-11-28 05:10:00,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:10:00,276 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:10:00,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:10:00,277 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:10:00,277 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:10:00,277 INFO L87 Difference]: Start difference. First operand 449 states and 604 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-28 05:10:00,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:10:00,486 INFO L93 Difference]: Finished difference Result 809 states and 1107 transitions. [2024-11-28 05:10:00,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:10:00,486 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 93 [2024-11-28 05:10:00,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:10:00,491 INFO L225 Difference]: With dead ends: 809 [2024-11-28 05:10:00,493 INFO L226 Difference]: Without dead ends: 485 [2024-11-28 05:10:00,495 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:10:00,497 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 13 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:10:00,498 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 96 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 05:10:00,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2024-11-28 05:10:00,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 479. [2024-11-28 05:10:00,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 359 states have (on average 1.2311977715877438) internal successors, (442), 362 states have internal predecessors, (442), 100 states have call successors, (100), 20 states have call predecessors, (100), 19 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2024-11-28 05:10:00,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 641 transitions. [2024-11-28 05:10:00,694 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 641 transitions. Word has length 93 [2024-11-28 05:10:00,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:10:00,695 INFO L471 AbstractCegarLoop]: Abstraction has 479 states and 641 transitions. [2024-11-28 05:10:00,695 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-28 05:10:00,695 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 641 transitions. [2024-11-28 05:10:00,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-28 05:10:00,697 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:10:00,697 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 5, 4, 4, 4, 3, 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] [2024-11-28 05:10:00,697 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-28 05:10:00,698 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:10:00,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:10:00,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1117881643, now seen corresponding path program 1 times [2024-11-28 05:10:00,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:10:00,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070861672] [2024-11-28 05:10:00,699 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:10:00,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:10:00,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:10:00,946 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 48 proven. 16 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2024-11-28 05:10:00,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:10:00,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070861672] [2024-11-28 05:10:00,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070861672] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:10:00,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038436142] [2024-11-28 05:10:00,947 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:10:00,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:10:00,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:10:00,949 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:10:00,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 05:10:01,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:10:01,042 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 05:10:01,044 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:10:01,132 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 70 proven. 16 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2024-11-28 05:10:01,134 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:10:01,275 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 40 proven. 16 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2024-11-28 05:10:01,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038436142] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:10:01,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:10:01,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 7 [2024-11-28 05:10:01,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416148140] [2024-11-28 05:10:01,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:10:01,277 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 05:10:01,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:10:01,277 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 05:10:01,279 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-11-28 05:10:01,279 INFO L87 Difference]: Start difference. First operand 479 states and 641 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 7 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2024-11-28 05:10:01,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:10:01,783 INFO L93 Difference]: Finished difference Result 1447 states and 2023 transitions. [2024-11-28 05:10:01,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 05:10:01,783 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 7 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) Word has length 93 [2024-11-28 05:10:01,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:10:01,795 INFO L225 Difference]: With dead ends: 1447 [2024-11-28 05:10:01,796 INFO L226 Difference]: Without dead ends: 1024 [2024-11-28 05:10:01,797 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 184 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-11-28 05:10:01,798 INFO L435 NwaCegarLoop]: 72 mSDtfsCounter, 19 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:10:01,798 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 210 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:10:01,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2024-11-28 05:10:02,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 1011. [2024-11-28 05:10:02,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 763 states have (on average 1.254259501965924) internal successors, (957), 772 states have internal predecessors, (957), 228 states have call successors, (228), 20 states have call predecessors, (228), 19 states have return successors, (227), 218 states have call predecessors, (227), 227 states have call successors, (227) [2024-11-28 05:10:02,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 1412 transitions. [2024-11-28 05:10:02,327 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 1412 transitions. Word has length 93 [2024-11-28 05:10:02,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:10:02,328 INFO L471 AbstractCegarLoop]: Abstraction has 1011 states and 1412 transitions. [2024-11-28 05:10:02,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 7 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2024-11-28 05:10:02,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 1412 transitions. [2024-11-28 05:10:02,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-28 05:10:02,332 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:10:02,332 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:10:02,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 05:10:02,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-28 05:10:02,537 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:10:02,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:10:02,538 INFO L85 PathProgramCache]: Analyzing trace with hash 2012527453, now seen corresponding path program 2 times [2024-11-28 05:10:02,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:10:02,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046720655] [2024-11-28 05:10:02,538 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:10:02,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:10:02,569 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:10:02,569 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:10:02,993 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2024-11-28 05:10:02,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:10:02,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046720655] [2024-11-28 05:10:02,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046720655] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:10:02,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906354323] [2024-11-28 05:10:02,994 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:10:02,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:10:02,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:10:02,996 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:10:03,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 05:10:03,085 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:10:03,085 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:10:03,092 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 05:10:03,095 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:10:03,304 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:10:03,305 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:10:03,749 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2024-11-28 05:10:03,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906354323] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:10:03,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:10:03,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 24 [2024-11-28 05:10:03,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005098742] [2024-11-28 05:10:03,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:10:03,750 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 05:10:03,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:10:03,751 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 05:10:03,752 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2024-11-28 05:10:03,752 INFO L87 Difference]: Start difference. First operand 1011 states and 1412 transitions. Second operand has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 21 states have call successors, (34), 12 states have call predecessors, (34), 11 states have return successors, (33), 20 states have call predecessors, (33), 20 states have call successors, (33) [2024-11-28 05:10:05,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:10:05,063 INFO L93 Difference]: Finished difference Result 1457 states and 2024 transitions. [2024-11-28 05:10:05,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-28 05:10:05,064 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 21 states have call successors, (34), 12 states have call predecessors, (34), 11 states have return successors, (33), 20 states have call predecessors, (33), 20 states have call successors, (33) Word has length 93 [2024-11-28 05:10:05,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:10:05,070 INFO L225 Difference]: With dead ends: 1457 [2024-11-28 05:10:05,071 INFO L226 Difference]: Without dead ends: 795 [2024-11-28 05:10:05,074 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=584, Invalid=1056, Unknown=0, NotChecked=0, Total=1640 [2024-11-28 05:10:05,075 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 312 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 05:10:05,075 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 320 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 05:10:05,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2024-11-28 05:10:05,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 737. [2024-11-28 05:10:05,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 553 states have (on average 1.209764918625678) internal successors, (669), 558 states have internal predecessors, (669), 162 states have call successors, (162), 22 states have call predecessors, (162), 21 states have return successors, (161), 156 states have call predecessors, (161), 161 states have call successors, (161) [2024-11-28 05:10:05,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 992 transitions. [2024-11-28 05:10:05,391 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 992 transitions. Word has length 93 [2024-11-28 05:10:05,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:10:05,391 INFO L471 AbstractCegarLoop]: Abstraction has 737 states and 992 transitions. [2024-11-28 05:10:05,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 21 states have call successors, (34), 12 states have call predecessors, (34), 11 states have return successors, (33), 20 states have call predecessors, (33), 20 states have call successors, (33) [2024-11-28 05:10:05,392 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 992 transitions. [2024-11-28 05:10:05,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-28 05:10:05,397 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:10:05,397 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:10:05,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 05:10:05,602 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:10:05,602 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:10:05,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:10:05,603 INFO L85 PathProgramCache]: Analyzing trace with hash 104822048, now seen corresponding path program 1 times [2024-11-28 05:10:05,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:10:05,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224315770] [2024-11-28 05:10:05,604 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:10:05,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:10:05,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:10:06,061 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 56 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2024-11-28 05:10:06,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:10:06,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224315770] [2024-11-28 05:10:06,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224315770] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:10:06,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203875627] [2024-11-28 05:10:06,061 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:10:06,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:10:06,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:10:06,066 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:10:06,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 05:10:06,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:10:06,144 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 05:10:06,148 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:10:06,334 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 236 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:10:06,334 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:10:06,773 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 56 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2024-11-28 05:10:06,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203875627] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:10:06,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:10:06,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 26 [2024-11-28 05:10:06,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202601093] [2024-11-28 05:10:06,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:10:06,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 05:10:06,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:10:06,776 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 05:10:06,776 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2024-11-28 05:10:06,776 INFO L87 Difference]: Start difference. First operand 737 states and 992 transitions. Second operand has 26 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 23 states have call successors, (37), 13 states have call predecessors, (37), 12 states have return successors, (36), 22 states have call predecessors, (36), 22 states have call successors, (36) [2024-11-28 05:10:08,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:10:08,041 INFO L93 Difference]: Finished difference Result 848 states and 1150 transitions. [2024-11-28 05:10:08,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-28 05:10:08,042 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 23 states have call successors, (37), 13 states have call predecessors, (37), 12 states have return successors, (36), 22 states have call predecessors, (36), 22 states have call successors, (36) Word has length 99 [2024-11-28 05:10:08,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:10:08,049 INFO L225 Difference]: With dead ends: 848 [2024-11-28 05:10:08,050 INFO L226 Difference]: Without dead ends: 843 [2024-11-28 05:10:08,052 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=670, Invalid=1222, Unknown=0, NotChecked=0, Total=1892 [2024-11-28 05:10:08,053 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 352 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 05:10:08,054 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 306 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 05:10:08,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2024-11-28 05:10:08,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 828. [2024-11-28 05:10:08,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 622 states have (on average 1.1881028938906752) internal successors, (739), 628 states have internal predecessors, (739), 182 states have call successors, (182), 24 states have call predecessors, (182), 23 states have return successors, (181), 175 states have call predecessors, (181), 181 states have call successors, (181) [2024-11-28 05:10:08,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1102 transitions. [2024-11-28 05:10:08,341 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1102 transitions. Word has length 99 [2024-11-28 05:10:08,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:10:08,342 INFO L471 AbstractCegarLoop]: Abstraction has 828 states and 1102 transitions. [2024-11-28 05:10:08,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 23 states have call successors, (37), 13 states have call predecessors, (37), 12 states have return successors, (36), 22 states have call predecessors, (36), 22 states have call successors, (36) [2024-11-28 05:10:08,342 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1102 transitions. [2024-11-28 05:10:08,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2024-11-28 05:10:08,352 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:10:08,353 INFO L218 NwaCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:10:08,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-28 05:10:08,553 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:10:08,554 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:10:08,554 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:10:08,554 INFO L85 PathProgramCache]: Analyzing trace with hash -993436764, now seen corresponding path program 2 times [2024-11-28 05:10:08,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:10:08,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427386649] [2024-11-28 05:10:08,554 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:10:08,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:10:08,579 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:10:08,579 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:10:08,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 206 proven. 0 refuted. 0 times theorem prover too weak. 898 trivial. 0 not checked. [2024-11-28 05:10:08,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:10:08,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427386649] [2024-11-28 05:10:08,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427386649] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:10:08,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:10:08,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:10:08,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744963807] [2024-11-28 05:10:08,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:10:08,685 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:10:08,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:10:08,685 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:10:08,686 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:10:08,686 INFO L87 Difference]: Start difference. First operand 828 states and 1102 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-28 05:10:09,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:10:09,023 INFO L93 Difference]: Finished difference Result 1341 states and 1782 transitions. [2024-11-28 05:10:09,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:10:09,024 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 183 [2024-11-28 05:10:09,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:10:09,031 INFO L225 Difference]: With dead ends: 1341 [2024-11-28 05:10:09,031 INFO L226 Difference]: Without dead ends: 858 [2024-11-28 05:10:09,033 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:10:09,034 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 9 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:10:09,035 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 91 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 05:10:09,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2024-11-28 05:10:09,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 803. [2024-11-28 05:10:09,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 606 states have (on average 1.1798679867986799) internal successors, (715), 613 states have internal predecessors, (715), 173 states have call successors, (173), 24 states have call predecessors, (173), 23 states have return successors, (172), 165 states have call predecessors, (172), 172 states have call successors, (172) [2024-11-28 05:10:09,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1060 transitions. [2024-11-28 05:10:09,359 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1060 transitions. Word has length 183 [2024-11-28 05:10:09,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:10:09,360 INFO L471 AbstractCegarLoop]: Abstraction has 803 states and 1060 transitions. [2024-11-28 05:10:09,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-28 05:10:09,360 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1060 transitions. [2024-11-28 05:10:09,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2024-11-28 05:10:09,369 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:10:09,370 INFO L218 NwaCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:10:09,370 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-28 05:10:09,370 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:10:09,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:10:09,371 INFO L85 PathProgramCache]: Analyzing trace with hash 167568258, now seen corresponding path program 3 times [2024-11-28 05:10:09,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:10:09,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136985611] [2024-11-28 05:10:09,372 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:10:09,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:10:09,487 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-28 05:10:09,487 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:10:09,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 212 proven. 112 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2024-11-28 05:10:09,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:10:09,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136985611] [2024-11-28 05:10:09,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136985611] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:10:09,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918756076] [2024-11-28 05:10:09,831 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:10:09,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:10:09,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:10:09,834 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:10:09,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 05:10:10,110 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-28 05:10:10,110 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:10:10,112 INFO L256 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 05:10:10,120 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:10:10,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 224 proven. 100 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2024-11-28 05:10:10,393 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:10:11,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 224 proven. 100 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2024-11-28 05:10:11,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918756076] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:10:11,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:10:11,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2024-11-28 05:10:11,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501155570] [2024-11-28 05:10:11,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:10:11,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 05:10:11,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:10:11,019 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 05:10:11,019 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-11-28 05:10:11,019 INFO L87 Difference]: Start difference. First operand 803 states and 1060 transitions. Second operand has 20 states, 20 states have (on average 6.55) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (38), 19 states have call predecessors, (38), 19 states have call successors, (38) [2024-11-28 05:10:14,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:10:14,240 INFO L93 Difference]: Finished difference Result 3365 states and 4723 transitions. [2024-11-28 05:10:14,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-28 05:10:14,241 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.55) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (38), 19 states have call predecessors, (38), 19 states have call successors, (38) Word has length 183 [2024-11-28 05:10:14,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:10:14,263 INFO L225 Difference]: With dead ends: 3365 [2024-11-28 05:10:14,263 INFO L226 Difference]: Without dead ends: 3066 [2024-11-28 05:10:14,266 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=555, Invalid=2097, Unknown=0, NotChecked=0, Total=2652 [2024-11-28 05:10:14,267 INFO L435 NwaCegarLoop]: 222 mSDtfsCounter, 377 mSDsluCounter, 1628 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 1850 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:10:14,268 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 1850 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 836 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-28 05:10:14,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3066 states. [2024-11-28 05:10:15,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3066 to 2563. [2024-11-28 05:10:15,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 1937 states have (on average 1.2395456892101187) internal successors, (2401), 1972 states have internal predecessors, (2401), 602 states have call successors, (602), 24 states have call predecessors, (602), 23 states have return successors, (601), 566 states have call predecessors, (601), 601 states have call successors, (601) [2024-11-28 05:10:15,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 3604 transitions. [2024-11-28 05:10:15,325 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 3604 transitions. Word has length 183 [2024-11-28 05:10:15,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:10:15,328 INFO L471 AbstractCegarLoop]: Abstraction has 2563 states and 3604 transitions. [2024-11-28 05:10:15,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.55) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (38), 19 states have call predecessors, (38), 19 states have call successors, (38) [2024-11-28 05:10:15,328 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 3604 transitions. [2024-11-28 05:10:15,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2024-11-28 05:10:15,342 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:10:15,342 INFO L218 NwaCegarLoop]: trace histogram [21, 20, 20, 9, 9, 8, 8, 8, 8, 8, 8, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:10:15,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 05:10:15,543 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 05:10:15,544 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:10:15,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:10:15,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1795040542, now seen corresponding path program 4 times [2024-11-28 05:10:15,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:10:15,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430067847] [2024-11-28 05:10:15,546 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:10:15,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:10:15,621 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:10:15,621 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:10:15,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 196 proven. 20 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2024-11-28 05:10:15,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:10:15,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430067847] [2024-11-28 05:10:15,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430067847] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:10:15,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712634133] [2024-11-28 05:10:15,898 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:10:15,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:10:15,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:10:15,901 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:10:15,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 05:10:16,035 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:10:16,035 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:10:16,038 INFO L256 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 05:10:16,044 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:10:16,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 264 proven. 184 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2024-11-28 05:10:16,316 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:10:16,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 124 proven. 184 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2024-11-28 05:10:16,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712634133] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:10:16,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:10:16,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 14 [2024-11-28 05:10:16,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125883784] [2024-11-28 05:10:16,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:10:16,715 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 05:10:16,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:10:16,716 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 05:10:16,716 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2024-11-28 05:10:16,716 INFO L87 Difference]: Start difference. First operand 2563 states and 3604 transitions. Second operand has 14 states, 14 states have (on average 7.785714285714286) internal successors, (109), 14 states have internal predecessors, (109), 14 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 14 states have call predecessors, (30), 14 states have call successors, (30) [2024-11-28 05:10:19,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:10:19,382 INFO L93 Difference]: Finished difference Result 5369 states and 7628 transitions. [2024-11-28 05:10:19,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-28 05:10:19,383 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.785714285714286) internal successors, (109), 14 states have internal predecessors, (109), 14 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 14 states have call predecessors, (30), 14 states have call successors, (30) Word has length 183 [2024-11-28 05:10:19,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:10:19,408 INFO L225 Difference]: With dead ends: 5369 [2024-11-28 05:10:19,408 INFO L226 Difference]: Without dead ends: 4029 [2024-11-28 05:10:19,413 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 382 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=373, Invalid=1883, Unknown=0, NotChecked=0, Total=2256 [2024-11-28 05:10:19,414 INFO L435 NwaCegarLoop]: 229 mSDtfsCounter, 230 mSDsluCounter, 1603 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 1832 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 05:10:19,414 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 1832 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 05:10:19,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4029 states. [2024-11-28 05:10:20,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4029 to 3539. [2024-11-28 05:10:20,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3539 states, 2674 states have (on average 1.236724008975318) internal successors, (3307), 2725 states have internal predecessors, (3307), 841 states have call successors, (841), 24 states have call predecessors, (841), 23 states have return successors, (840), 789 states have call predecessors, (840), 840 states have call successors, (840) [2024-11-28 05:10:20,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3539 states to 3539 states and 4988 transitions. [2024-11-28 05:10:20,803 INFO L78 Accepts]: Start accepts. Automaton has 3539 states and 4988 transitions. Word has length 183 [2024-11-28 05:10:20,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:10:20,803 INFO L471 AbstractCegarLoop]: Abstraction has 3539 states and 4988 transitions. [2024-11-28 05:10:20,804 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.785714285714286) internal successors, (109), 14 states have internal predecessors, (109), 14 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 14 states have call predecessors, (30), 14 states have call successors, (30) [2024-11-28 05:10:20,804 INFO L276 IsEmpty]: Start isEmpty. Operand 3539 states and 4988 transitions. [2024-11-28 05:10:20,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2024-11-28 05:10:20,819 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:10:20,819 INFO L218 NwaCegarLoop]: trace histogram [21, 20, 20, 10, 9, 9, 9, 8, 7, 7, 7, 6, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:10:20,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 05:10:21,024 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 05:10:21,024 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:10:21,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:10:21,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1364236652, now seen corresponding path program 5 times [2024-11-28 05:10:21,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:10:21,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873556909] [2024-11-28 05:10:21,025 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:10:21,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:10:21,080 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-11-28 05:10:21,080 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:10:21,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 186 proven. 84 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2024-11-28 05:10:21,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:10:21,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873556909] [2024-11-28 05:10:21,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873556909] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:10:21,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989274449] [2024-11-28 05:10:21,316 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:10:21,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:10:21,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:10:21,318 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:10:21,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 05:10:21,517 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-11-28 05:10:21,517 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:10:21,519 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 05:10:21,523 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:10:21,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 516 proven. 84 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2024-11-28 05:10:21,721 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:10:22,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 226 proven. 84 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2024-11-28 05:10:22,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989274449] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:10:22,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:10:22,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-11-28 05:10:22,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595852728] [2024-11-28 05:10:22,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:10:22,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 05:10:22,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:10:22,050 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 05:10:22,050 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2024-11-28 05:10:22,055 INFO L87 Difference]: Start difference. First operand 3539 states and 4988 transitions. Second operand has 16 states, 16 states have (on average 7.9375) internal successors, (127), 16 states have internal predecessors, (127), 16 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (40), 16 states have call predecessors, (40), 16 states have call successors, (40) [2024-11-28 05:10:24,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:10:24,895 INFO L93 Difference]: Finished difference Result 6210 states and 8847 transitions. [2024-11-28 05:10:24,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-28 05:10:24,896 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.9375) internal successors, (127), 16 states have internal predecessors, (127), 16 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (40), 16 states have call predecessors, (40), 16 states have call successors, (40) Word has length 183 [2024-11-28 05:10:24,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:10:24,903 INFO L225 Difference]: With dead ends: 6210 [2024-11-28 05:10:24,904 INFO L226 Difference]: Without dead ends: 0 [2024-11-28 05:10:24,920 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 385 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=451, Invalid=1355, Unknown=0, NotChecked=0, Total=1806 [2024-11-28 05:10:24,921 INFO L435 NwaCegarLoop]: 152 mSDtfsCounter, 261 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 1254 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 05:10:24,921 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 1254 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 05:10:24,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-28 05:10:24,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-28 05:10:24,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:10:24,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-28 05:10:24,926 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 183 [2024-11-28 05:10:24,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:10:24,926 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-28 05:10:24,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.9375) internal successors, (127), 16 states have internal predecessors, (127), 16 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (40), 16 states have call predecessors, (40), 16 states have call successors, (40) [2024-11-28 05:10:24,927 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-28 05:10:24,927 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-28 05:10:24,930 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-28 05:10:24,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-28 05:10:25,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b419e351-b430-445b-837c-7815f1804312/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:10:25,138 INFO L422 BasicCegarLoop]: Path program histogram: [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:10:25,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-11-28 05:12:14,464 WARN L286 SmtUtils]: Spent 1.82m on a formula simplification. DAG size of input: 921 DAG size of output: 939 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-11-28 05:14:32,223 WARN L286 SmtUtils]: Spent 2.30m on a formula simplification. DAG size of input: 784 DAG size of output: 889 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-11-28 05:16:11,427 WARN L286 SmtUtils]: Spent 1.65m on a formula simplification. DAG size of input: 828 DAG size of output: 911 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-11-28 05:16:41,339 WARN L286 SmtUtils]: Spent 29.91s on a formula simplification. DAG size of input: 781 DAG size of output: 880 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or)