./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-20.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-20.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya --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 83e0ad3378da9e7cc965d77adc302d77c41a5619aa8f5e9839aafa579efaaae3 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 04:02:01,044 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 04:02:01,108 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 04:02:01,113 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 04:02:01,113 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 04:02:01,137 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 04:02:01,138 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 04:02:01,138 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 04:02:01,139 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 04:02:01,140 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 04:02:01,140 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 04:02:01,141 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 04:02:01,142 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 04:02:01,142 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 04:02:01,143 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 04:02:01,144 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 04:02:01,144 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 04:02:01,145 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 04:02:01,145 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 04:02:01,146 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 04:02:01,146 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 04:02:01,147 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 04:02:01,147 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 04:02:01,148 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 04:02:01,148 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 04:02:01,149 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 04:02:01,149 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 04:02:01,150 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 04:02:01,150 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 04:02:01,151 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 04:02:01,151 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 04:02:01,152 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:02:01,152 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 04:02:01,152 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 04:02:01,152 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 04:02:01,153 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 04:02:01,153 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 04:02:01,153 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 04:02:01,153 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 04:02:01,153 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 04:02:01,154 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 04:02:01,154 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 04:02:01,154 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83e0ad3378da9e7cc965d77adc302d77c41a5619aa8f5e9839aafa579efaaae3 [2023-11-29 04:02:01,362 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 04:02:01,382 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 04:02:01,385 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 04:02:01,386 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 04:02:01,387 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 04:02:01,388 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-20.i [2023-11-29 04:02:04,363 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 04:02:04,681 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 04:02:04,682 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-20.i [2023-11-29 04:02:04,702 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/data/0471c429f/cdee8b0dd07e4124ac7e8febff8237bd/FLAG206e82173 [2023-11-29 04:02:04,720 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/data/0471c429f/cdee8b0dd07e4124ac7e8febff8237bd [2023-11-29 04:02:04,723 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 04:02:04,725 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 04:02:04,727 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 04:02:04,727 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 04:02:04,734 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 04:02:04,735 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:02:04" (1/1) ... [2023-11-29 04:02:04,736 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4135beb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:02:04, skipping insertion in model container [2023-11-29 04:02:04,736 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:02:04" (1/1) ... [2023-11-29 04:02:04,824 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 04:02:04,991 WARN L240 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_670c08c4-2ed9-4739-bb62-127425d4113e/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-20.i[916,929] [2023-11-29 04:02:05,274 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:02:05,297 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 04:02:05,313 WARN L240 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_670c08c4-2ed9-4739-bb62-127425d4113e/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-20.i[916,929] [2023-11-29 04:02:05,470 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:02:05,495 INFO L206 MainTranslator]: Completed translation [2023-11-29 04:02:05,496 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:02:05 WrapperNode [2023-11-29 04:02:05,496 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 04:02:05,497 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 04:02:05,497 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 04:02:05,497 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 04:02:05,504 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:02:05" (1/1) ... [2023-11-29 04:02:05,538 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:02:05" (1/1) ... [2023-11-29 04:02:05,672 INFO L138 Inliner]: procedures = 26, calls = 80, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 701 [2023-11-29 04:02:05,672 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 04:02:05,673 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 04:02:05,673 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 04:02:05,673 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 04:02:05,684 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:02:05" (1/1) ... [2023-11-29 04:02:05,685 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:02:05" (1/1) ... [2023-11-29 04:02:05,714 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:02:05" (1/1) ... [2023-11-29 04:02:05,814 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]. [2023-11-29 04:02:05,815 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:02:05" (1/1) ... [2023-11-29 04:02:05,815 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:02:05" (1/1) ... [2023-11-29 04:02:05,846 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:02:05" (1/1) ... [2023-11-29 04:02:05,854 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:02:05" (1/1) ... [2023-11-29 04:02:05,882 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:02:05" (1/1) ... [2023-11-29 04:02:05,888 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:02:05" (1/1) ... [2023-11-29 04:02:05,905 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 04:02:05,907 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 04:02:05,907 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 04:02:05,907 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 04:02:05,908 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:02:05" (1/1) ... [2023-11-29 04:02:05,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:02:05,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:02:05,939 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 04:02:05,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 04:02:05,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 04:02:05,978 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 04:02:05,978 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 04:02:05,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 04:02:05,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 04:02:05,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 04:02:06,151 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 04:02:06,152 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 04:02:07,412 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 04:02:07,474 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 04:02:07,474 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 04:02:07,475 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:02:07 BoogieIcfgContainer [2023-11-29 04:02:07,475 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 04:02:07,478 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 04:02:07,478 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 04:02:07,481 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 04:02:07,481 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 04:02:04" (1/3) ... [2023-11-29 04:02:07,481 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b374871 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:02:07, skipping insertion in model container [2023-11-29 04:02:07,482 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:02:05" (2/3) ... [2023-11-29 04:02:07,482 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b374871 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:02:07, skipping insertion in model container [2023-11-29 04:02:07,482 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:02:07" (3/3) ... [2023-11-29 04:02:07,484 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-20.i [2023-11-29 04:02:07,502 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 04:02:07,503 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 04:02:07,564 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 04:02:07,570 INFO L357 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, mHoare=true, 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;@5c296398, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 04:02:07,571 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 04:02:07,577 INFO L276 IsEmpty]: Start isEmpty. Operand has 266 states, 196 states have (on average 1.566326530612245) internal successors, (307), 197 states have internal predecessors, (307), 67 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2023-11-29 04:02:07,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2023-11-29 04:02:07,610 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:02:07,612 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:02:07,612 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:02:07,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:02:07,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1202362175, now seen corresponding path program 1 times [2023-11-29 04:02:07,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:02:07,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618830576] [2023-11-29 04:02:07,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:07,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:02:07,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:02:08,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:02:08,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618830576] [2023-11-29 04:02:08,066 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 04:02:08,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489437147] [2023-11-29 04:02:08,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:08,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:08,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:02:08,068 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:02:08,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 04:02:08,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:02:08,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 1257 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 04:02:08,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:02:08,723 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 8712 trivial. 0 not checked. [2023-11-29 04:02:08,723 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:02:08,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489437147] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:02:08,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:02:08,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 04:02:08,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332828787] [2023-11-29 04:02:08,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:02:08,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 04:02:08,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:02:08,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 04:02:08,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 04:02:08,774 INFO L87 Difference]: Start difference. First operand has 266 states, 196 states have (on average 1.566326530612245) internal successors, (307), 197 states have internal predecessors, (307), 67 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) Second operand has 2 states, 2 states have (on average 70.5) internal successors, (141), 2 states have internal predecessors, (141), 2 states have call successors, (67), 2 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 2 states have call successors, (67) [2023-11-29 04:02:08,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:02:08,866 INFO L93 Difference]: Finished difference Result 529 states and 947 transitions. [2023-11-29 04:02:08,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 04:02:08,870 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 70.5) internal successors, (141), 2 states have internal predecessors, (141), 2 states have call successors, (67), 2 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 2 states have call successors, (67) Word has length 471 [2023-11-29 04:02:08,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:02:08,884 INFO L225 Difference]: With dead ends: 529 [2023-11-29 04:02:08,884 INFO L226 Difference]: Without dead ends: 264 [2023-11-29 04:02:08,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 04:02:08,896 INFO L413 NwaCegarLoop]: 432 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:02:08,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 432 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:02:08,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2023-11-29 04:02:08,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2023-11-29 04:02:08,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 195 states have (on average 1.5487179487179488) internal successors, (302), 195 states have internal predecessors, (302), 67 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2023-11-29 04:02:08,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 436 transitions. [2023-11-29 04:02:08,986 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 436 transitions. Word has length 471 [2023-11-29 04:02:08,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:02:08,987 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 436 transitions. [2023-11-29 04:02:08,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 70.5) internal successors, (141), 2 states have internal predecessors, (141), 2 states have call successors, (67), 2 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 2 states have call successors, (67) [2023-11-29 04:02:08,988 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 436 transitions. [2023-11-29 04:02:09,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2023-11-29 04:02:09,003 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:02:09,004 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:02:09,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-29 04:02:09,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:09,205 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:02:09,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:02:09,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1485785199, now seen corresponding path program 1 times [2023-11-29 04:02:09,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:02:09,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284340937] [2023-11-29 04:02:09,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:09,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:02:09,365 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:02:09,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [696338844] [2023-11-29 04:02:09,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:09,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:09,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:02:09,368 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:02:09,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 04:02:09,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:02:09,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 1257 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 04:02:09,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:02:09,933 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2023-11-29 04:02:09,933 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:02:09,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:02:09,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284340937] [2023-11-29 04:02:09,934 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:02:09,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696338844] [2023-11-29 04:02:09,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696338844] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:02:09,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:02:09,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:02:09,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447996035] [2023-11-29 04:02:09,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:02:09,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:02:09,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:02:09,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:02:09,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:02:09,940 INFO L87 Difference]: Start difference. First operand 264 states and 436 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:02:09,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:02:09,998 INFO L93 Difference]: Finished difference Result 528 states and 873 transitions. [2023-11-29 04:02:09,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:02:09,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) Word has length 471 [2023-11-29 04:02:10,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:02:10,004 INFO L225 Difference]: With dead ends: 528 [2023-11-29 04:02:10,004 INFO L226 Difference]: Without dead ends: 265 [2023-11-29 04:02:10,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 469 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:02:10,007 INFO L413 NwaCegarLoop]: 431 mSDtfsCounter, 0 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:02:10,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 856 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:02:10,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2023-11-29 04:02:10,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2023-11-29 04:02:10,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 196 states have (on average 1.5459183673469388) internal successors, (303), 196 states have internal predecessors, (303), 67 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2023-11-29 04:02:10,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 437 transitions. [2023-11-29 04:02:10,035 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 437 transitions. Word has length 471 [2023-11-29 04:02:10,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:02:10,038 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 437 transitions. [2023-11-29 04:02:10,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:02:10,039 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 437 transitions. [2023-11-29 04:02:10,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2023-11-29 04:02:10,051 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:02:10,051 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:02:10,060 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 04:02:10,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:10,252 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:02:10,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:02:10,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1936481793, now seen corresponding path program 1 times [2023-11-29 04:02:10,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:02:10,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764462629] [2023-11-29 04:02:10,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:10,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:02:10,340 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:02:10,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1185938922] [2023-11-29 04:02:10,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:10,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:10,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:02:10,342 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:02:10,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 04:02:10,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:02:10,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 1259 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 04:02:10,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:02:12,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2023-11-29 04:02:12,111 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:02:12,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:02:12,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764462629] [2023-11-29 04:02:12,111 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:02:12,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185938922] [2023-11-29 04:02:12,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185938922] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:02:12,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:02:12,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 04:02:12,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517429785] [2023-11-29 04:02:12,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:02:12,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 04:02:12,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:02:12,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 04:02:12,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:02:12,115 INFO L87 Difference]: Start difference. First operand 265 states and 437 transitions. Second operand has 5 states, 5 states have (on average 28.2) internal successors, (141), 4 states have internal predecessors, (141), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:02:12,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:02:12,645 INFO L93 Difference]: Finished difference Result 794 states and 1310 transitions. [2023-11-29 04:02:12,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 04:02:12,646 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 4 states have internal predecessors, (141), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) Word has length 473 [2023-11-29 04:02:12,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:02:12,652 INFO L225 Difference]: With dead ends: 794 [2023-11-29 04:02:12,653 INFO L226 Difference]: Without dead ends: 530 [2023-11-29 04:02:12,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 469 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-29 04:02:12,655 INFO L413 NwaCegarLoop]: 427 mSDtfsCounter, 575 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 1571 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:02:12,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [575 Valid, 1571 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 04:02:12,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2023-11-29 04:02:12,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 377. [2023-11-29 04:02:12,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 240 states have (on average 1.4458333333333333) internal successors, (347), 240 states have internal predecessors, (347), 134 states have call successors, (134), 2 states have call predecessors, (134), 2 states have return successors, (134), 134 states have call predecessors, (134), 134 states have call successors, (134) [2023-11-29 04:02:12,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 615 transitions. [2023-11-29 04:02:12,724 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 615 transitions. Word has length 473 [2023-11-29 04:02:12,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:02:12,726 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 615 transitions. [2023-11-29 04:02:12,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 4 states have internal predecessors, (141), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:02:12,727 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 615 transitions. [2023-11-29 04:02:12,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2023-11-29 04:02:12,731 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:02:12,731 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:02:12,740 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 04:02:12,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:12,936 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:02:12,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:02:12,937 INFO L85 PathProgramCache]: Analyzing trace with hash -757414397, now seen corresponding path program 1 times [2023-11-29 04:02:12,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:02:12,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697484458] [2023-11-29 04:02:12,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:12,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:02:13,034 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:02:13,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [448696352] [2023-11-29 04:02:13,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:13,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:13,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:02:13,036 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:02:13,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 04:02:13,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:02:13,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 1257 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 04:02:13,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:02:13,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2023-11-29 04:02:13,610 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:02:13,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:02:13,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697484458] [2023-11-29 04:02:13,610 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:02:13,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448696352] [2023-11-29 04:02:13,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448696352] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:02:13,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:02:13,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:02:13,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947107697] [2023-11-29 04:02:13,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:02:13,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:02:13,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:02:13,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:02:13,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:02:13,615 INFO L87 Difference]: Start difference. First operand 377 states and 615 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:02:13,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:02:13,754 INFO L93 Difference]: Finished difference Result 850 states and 1395 transitions. [2023-11-29 04:02:13,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:02:13,755 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) Word has length 473 [2023-11-29 04:02:13,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:02:13,762 INFO L225 Difference]: With dead ends: 850 [2023-11-29 04:02:13,762 INFO L226 Difference]: Without dead ends: 586 [2023-11-29 04:02:13,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:02:13,765 INFO L413 NwaCegarLoop]: 558 mSDtfsCounter, 330 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:02:13,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 973 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:02:13,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2023-11-29 04:02:13,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 583. [2023-11-29 04:02:13,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 394 states have (on average 1.4796954314720812) internal successors, (583), 395 states have internal predecessors, (583), 185 states have call successors, (185), 3 states have call predecessors, (185), 3 states have return successors, (185), 184 states have call predecessors, (185), 185 states have call successors, (185) [2023-11-29 04:02:13,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 953 transitions. [2023-11-29 04:02:13,846 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 953 transitions. Word has length 473 [2023-11-29 04:02:13,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:02:13,848 INFO L495 AbstractCegarLoop]: Abstraction has 583 states and 953 transitions. [2023-11-29 04:02:13,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:02:13,848 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 953 transitions. [2023-11-29 04:02:13,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2023-11-29 04:02:13,854 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:02:13,854 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:02:13,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 04:02:14,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:14,056 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:02:14,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:02:14,057 INFO L85 PathProgramCache]: Analyzing trace with hash -264788223, now seen corresponding path program 1 times [2023-11-29 04:02:14,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:02:14,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162917502] [2023-11-29 04:02:14,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:14,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:02:14,150 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:02:14,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [760525676] [2023-11-29 04:02:14,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:14,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:14,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:02:14,152 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:02:14,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 04:02:14,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:02:14,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 1256 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 04:02:14,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:02:14,697 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2023-11-29 04:02:14,697 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:02:14,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:02:14,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162917502] [2023-11-29 04:02:14,698 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:02:14,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760525676] [2023-11-29 04:02:14,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760525676] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:02:14,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:02:14,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:02:14,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92161711] [2023-11-29 04:02:14,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:02:14,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:02:14,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:02:14,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:02:14,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:02:14,702 INFO L87 Difference]: Start difference. First operand 583 states and 953 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:02:14,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:02:14,969 INFO L93 Difference]: Finished difference Result 1517 states and 2489 transitions. [2023-11-29 04:02:14,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:02:14,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) Word has length 473 [2023-11-29 04:02:14,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:02:14,982 INFO L225 Difference]: With dead ends: 1517 [2023-11-29 04:02:14,983 INFO L226 Difference]: Without dead ends: 1047 [2023-11-29 04:02:14,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:02:14,987 INFO L413 NwaCegarLoop]: 426 mSDtfsCounter, 420 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:02:14,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [420 Valid, 844 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 04:02:14,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2023-11-29 04:02:15,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 645. [2023-11-29 04:02:15,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 456 states have (on average 1.4978070175438596) internal successors, (683), 457 states have internal predecessors, (683), 185 states have call successors, (185), 3 states have call predecessors, (185), 3 states have return successors, (185), 184 states have call predecessors, (185), 185 states have call successors, (185) [2023-11-29 04:02:15,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1053 transitions. [2023-11-29 04:02:15,156 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1053 transitions. Word has length 473 [2023-11-29 04:02:15,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:02:15,158 INFO L495 AbstractCegarLoop]: Abstraction has 645 states and 1053 transitions. [2023-11-29 04:02:15,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:02:15,159 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1053 transitions. [2023-11-29 04:02:15,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2023-11-29 04:02:15,167 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:02:15,168 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:02:15,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 04:02:15,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:15,369 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:02:15,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:02:15,369 INFO L85 PathProgramCache]: Analyzing trace with hash 148139131, now seen corresponding path program 1 times [2023-11-29 04:02:15,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:02:15,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103396842] [2023-11-29 04:02:15,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:15,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:02:15,458 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:02:15,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1122886987] [2023-11-29 04:02:15,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:15,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:15,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:02:15,459 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:02:15,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 04:02:15,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:02:15,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 1255 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 04:02:15,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:02:15,996 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2023-11-29 04:02:15,997 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:02:15,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:02:15,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103396842] [2023-11-29 04:02:15,997 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:02:15,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122886987] [2023-11-29 04:02:15,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122886987] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:02:15,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:02:15,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:02:15,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041189496] [2023-11-29 04:02:15,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:02:15,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:02:15,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:02:16,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:02:16,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:02:16,001 INFO L87 Difference]: Start difference. First operand 645 states and 1053 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:02:16,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:02:16,239 INFO L93 Difference]: Finished difference Result 1671 states and 2729 transitions. [2023-11-29 04:02:16,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:02:16,240 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) Word has length 473 [2023-11-29 04:02:16,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:02:16,250 INFO L225 Difference]: With dead ends: 1671 [2023-11-29 04:02:16,251 INFO L226 Difference]: Without dead ends: 1139 [2023-11-29 04:02:16,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:02:16,254 INFO L413 NwaCegarLoop]: 491 mSDtfsCounter, 397 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 901 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:02:16,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 901 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 04:02:16,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2023-11-29 04:02:16,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 845. [2023-11-29 04:02:16,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 656 states have (on average 1.5426829268292683) internal successors, (1012), 657 states have internal predecessors, (1012), 185 states have call successors, (185), 3 states have call predecessors, (185), 3 states have return successors, (185), 184 states have call predecessors, (185), 185 states have call successors, (185) [2023-11-29 04:02:16,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 1382 transitions. [2023-11-29 04:02:16,351 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 1382 transitions. Word has length 473 [2023-11-29 04:02:16,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:02:16,352 INFO L495 AbstractCegarLoop]: Abstraction has 845 states and 1382 transitions. [2023-11-29 04:02:16,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:02:16,353 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 1382 transitions. [2023-11-29 04:02:16,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2023-11-29 04:02:16,358 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:02:16,358 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:02:16,368 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 04:02:16,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:16,559 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:02:16,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:02:16,560 INFO L85 PathProgramCache]: Analyzing trace with hash -461107391, now seen corresponding path program 1 times [2023-11-29 04:02:16,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:02:16,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926540048] [2023-11-29 04:02:16,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:16,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:02:16,633 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:02:16,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [946564502] [2023-11-29 04:02:16,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:16,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:16,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:02:16,635 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:02:16,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 04:02:17,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:02:17,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 1255 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 04:02:17,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:02:17,144 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2023-11-29 04:02:17,145 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:02:17,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:02:17,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926540048] [2023-11-29 04:02:17,145 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:02:17,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946564502] [2023-11-29 04:02:17,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946564502] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:02:17,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:02:17,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:02:17,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310459265] [2023-11-29 04:02:17,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:02:17,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:02:17,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:02:17,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:02:17,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:02:17,149 INFO L87 Difference]: Start difference. First operand 845 states and 1382 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:02:17,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:02:17,299 INFO L93 Difference]: Finished difference Result 2151 states and 3515 transitions. [2023-11-29 04:02:17,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:02:17,300 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) Word has length 473 [2023-11-29 04:02:17,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:02:17,311 INFO L225 Difference]: With dead ends: 2151 [2023-11-29 04:02:17,311 INFO L226 Difference]: Without dead ends: 1419 [2023-11-29 04:02:17,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:02:17,314 INFO L413 NwaCegarLoop]: 699 mSDtfsCounter, 361 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 1113 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:02:17,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 1113 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:02:17,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2023-11-29 04:02:17,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 1129. [2023-11-29 04:02:17,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1129 states, 940 states have (on average 1.5702127659574467) internal successors, (1476), 941 states have internal predecessors, (1476), 185 states have call successors, (185), 3 states have call predecessors, (185), 3 states have return successors, (185), 184 states have call predecessors, (185), 185 states have call successors, (185) [2023-11-29 04:02:17,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1129 states to 1129 states and 1846 transitions. [2023-11-29 04:02:17,404 INFO L78 Accepts]: Start accepts. Automaton has 1129 states and 1846 transitions. Word has length 473 [2023-11-29 04:02:17,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:02:17,404 INFO L495 AbstractCegarLoop]: Abstraction has 1129 states and 1846 transitions. [2023-11-29 04:02:17,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:02:17,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1129 states and 1846 transitions. [2023-11-29 04:02:17,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2023-11-29 04:02:17,409 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:02:17,409 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:02:17,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-29 04:02:17,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 04:02:17,610 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:02:17,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:02:17,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1677261117, now seen corresponding path program 1 times [2023-11-29 04:02:17,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:02:17,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777890871] [2023-11-29 04:02:17,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:17,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:02:17,691 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:02:17,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549225219] [2023-11-29 04:02:17,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:17,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:17,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:02:17,693 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:02:17,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 04:02:18,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:02:18,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 1256 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 04:02:18,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:02:18,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2023-11-29 04:02:18,596 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:02:18,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:02:18,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777890871] [2023-11-29 04:02:18,597 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:02:18,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549225219] [2023-11-29 04:02:18,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549225219] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:02:18,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:02:18,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 04:02:18,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488709565] [2023-11-29 04:02:18,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:02:18,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 04:02:18,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:02:18,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 04:02:18,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:02:18,600 INFO L87 Difference]: Start difference. First operand 1129 states and 1846 transitions. Second operand has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:02:19,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:02:19,329 INFO L93 Difference]: Finished difference Result 4427 states and 7242 transitions. [2023-11-29 04:02:19,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:02:19,330 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) Word has length 473 [2023-11-29 04:02:19,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:02:19,356 INFO L225 Difference]: With dead ends: 4427 [2023-11-29 04:02:19,356 INFO L226 Difference]: Without dead ends: 3411 [2023-11-29 04:02:19,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-29 04:02:19,361 INFO L413 NwaCegarLoop]: 1358 mSDtfsCounter, 1234 mSDsluCounter, 1690 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1234 SdHoareTripleChecker+Valid, 3048 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 04:02:19,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1234 Valid, 3048 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 04:02:19,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3411 states. [2023-11-29 04:02:19,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3411 to 1939. [2023-11-29 04:02:19,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1630 states have (on average 1.554601226993865) internal successors, (2534), 1632 states have internal predecessors, (2534), 303 states have call successors, (303), 5 states have call predecessors, (303), 5 states have return successors, (303), 301 states have call predecessors, (303), 303 states have call successors, (303) [2023-11-29 04:02:19,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 3140 transitions. [2023-11-29 04:02:19,615 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 3140 transitions. Word has length 473 [2023-11-29 04:02:19,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:02:19,616 INFO L495 AbstractCegarLoop]: Abstraction has 1939 states and 3140 transitions. [2023-11-29 04:02:19,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:02:19,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 3140 transitions. [2023-11-29 04:02:19,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2023-11-29 04:02:19,623 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:02:19,624 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:02:19,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 04:02:19,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-29 04:02:19,824 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:02:19,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:02:19,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1644896535, now seen corresponding path program 1 times [2023-11-29 04:02:19,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:02:19,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736473343] [2023-11-29 04:02:19,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:19,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:02:19,906 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:02:19,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1226624741] [2023-11-29 04:02:19,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:19,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:19,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:02:19,913 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:02:19,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 04:02:20,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:02:20,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 1257 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 04:02:20,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:02:20,348 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2023-11-29 04:02:20,348 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:02:20,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:02:20,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736473343] [2023-11-29 04:02:20,348 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:02:20,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226624741] [2023-11-29 04:02:20,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226624741] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:02:20,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:02:20,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:02:20,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196132162] [2023-11-29 04:02:20,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:02:20,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:02:20,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:02:20,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:02:20,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:02:20,352 INFO L87 Difference]: Start difference. First operand 1939 states and 3140 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:02:20,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:02:20,692 INFO L93 Difference]: Finished difference Result 5547 states and 8992 transitions. [2023-11-29 04:02:20,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:02:20,693 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) Word has length 473 [2023-11-29 04:02:20,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:02:20,718 INFO L225 Difference]: With dead ends: 5547 [2023-11-29 04:02:20,718 INFO L226 Difference]: Without dead ends: 3721 [2023-11-29 04:02:20,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:02:20,724 INFO L413 NwaCegarLoop]: 695 mSDtfsCounter, 410 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 1114 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:02:20,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 1114 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 04:02:20,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3721 states. [2023-11-29 04:02:20,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3721 to 3079. [2023-11-29 04:02:20,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3079 states, 2770 states have (on average 1.5747292418772563) internal successors, (4362), 2772 states have internal predecessors, (4362), 303 states have call successors, (303), 5 states have call predecessors, (303), 5 states have return successors, (303), 301 states have call predecessors, (303), 303 states have call successors, (303) [2023-11-29 04:02:21,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3079 states to 3079 states and 4968 transitions. [2023-11-29 04:02:21,006 INFO L78 Accepts]: Start accepts. Automaton has 3079 states and 4968 transitions. Word has length 473 [2023-11-29 04:02:21,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:02:21,007 INFO L495 AbstractCegarLoop]: Abstraction has 3079 states and 4968 transitions. [2023-11-29 04:02:21,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:02:21,007 INFO L276 IsEmpty]: Start isEmpty. Operand 3079 states and 4968 transitions. [2023-11-29 04:02:21,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2023-11-29 04:02:21,017 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:02:21,017 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:02:21,026 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 04:02:21,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:21,218 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:02:21,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:02:21,219 INFO L85 PathProgramCache]: Analyzing trace with hash -690956377, now seen corresponding path program 1 times [2023-11-29 04:02:21,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:02:21,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382675405] [2023-11-29 04:02:21,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:21,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:02:21,304 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:02:21,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [757041356] [2023-11-29 04:02:21,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:21,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:21,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:02:21,306 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:02:21,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 04:02:21,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:02:21,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 1258 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 04:02:21,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:02:21,782 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2023-11-29 04:02:21,782 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:02:21,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:02:21,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382675405] [2023-11-29 04:02:21,782 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:02:21,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757041356] [2023-11-29 04:02:21,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757041356] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:02:21,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:02:21,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 04:02:21,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064450170] [2023-11-29 04:02:21,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:02:21,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:02:21,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:02:21,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:02:21,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:02:21,786 INFO L87 Difference]: Start difference. First operand 3079 states and 4968 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:02:22,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:02:22,082 INFO L93 Difference]: Finished difference Result 6675 states and 10748 transitions. [2023-11-29 04:02:22,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 04:02:22,083 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) Word has length 473 [2023-11-29 04:02:22,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:02:22,109 INFO L225 Difference]: With dead ends: 6675 [2023-11-29 04:02:22,109 INFO L226 Difference]: Without dead ends: 3709 [2023-11-29 04:02:22,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:02:22,117 INFO L413 NwaCegarLoop]: 749 mSDtfsCounter, 1047 mSDsluCounter, 877 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1047 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:02:22,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1047 Valid, 1626 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:02:22,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3709 states. [2023-11-29 04:02:22,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3709 to 3099. [2023-11-29 04:02:22,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3099 states, 2790 states have (on average 1.5734767025089607) internal successors, (4390), 2792 states have internal predecessors, (4390), 303 states have call successors, (303), 5 states have call predecessors, (303), 5 states have return successors, (303), 301 states have call predecessors, (303), 303 states have call successors, (303) [2023-11-29 04:02:22,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3099 states to 3099 states and 4996 transitions. [2023-11-29 04:02:22,461 INFO L78 Accepts]: Start accepts. Automaton has 3099 states and 4996 transitions. Word has length 473 [2023-11-29 04:02:22,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:02:22,462 INFO L495 AbstractCegarLoop]: Abstraction has 3099 states and 4996 transitions. [2023-11-29 04:02:22,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:02:22,463 INFO L276 IsEmpty]: Start isEmpty. Operand 3099 states and 4996 transitions. [2023-11-29 04:02:22,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2023-11-29 04:02:22,477 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:02:22,477 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:02:22,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 04:02:22,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 04:02:22,678 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:02:22,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:02:22,679 INFO L85 PathProgramCache]: Analyzing trace with hash 436506215, now seen corresponding path program 1 times [2023-11-29 04:02:22,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:02:22,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785385123] [2023-11-29 04:02:22,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:22,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:02:22,752 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:02:22,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [566480285] [2023-11-29 04:02:22,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:22,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:22,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:02:22,753 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:02:22,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 04:02:23,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:02:23,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 1258 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 04:02:23,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:02:23,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2023-11-29 04:02:23,265 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:02:23,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:02:23,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785385123] [2023-11-29 04:02:23,265 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:02:23,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566480285] [2023-11-29 04:02:23,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566480285] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:02:23,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:02:23,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:02:23,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481181616] [2023-11-29 04:02:23,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:02:23,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:02:23,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:02:23,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:02:23,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:02:23,269 INFO L87 Difference]: Start difference. First operand 3099 states and 4996 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:02:23,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:02:23,449 INFO L93 Difference]: Finished difference Result 5507 states and 8853 transitions. [2023-11-29 04:02:23,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:02:23,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) Word has length 473 [2023-11-29 04:02:23,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:02:23,467 INFO L225 Difference]: With dead ends: 5507 [2023-11-29 04:02:23,467 INFO L226 Difference]: Without dead ends: 2521 [2023-11-29 04:02:23,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:02:23,473 INFO L413 NwaCegarLoop]: 477 mSDtfsCounter, 333 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:02:23,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 883 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:02:23,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2521 states. [2023-11-29 04:02:23,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2521 to 2045. [2023-11-29 04:02:23,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2045 states, 1837 states have (on average 1.553075666848122) internal successors, (2853), 1837 states have internal predecessors, (2853), 201 states have call successors, (201), 6 states have call predecessors, (201), 6 states have return successors, (201), 201 states have call predecessors, (201), 201 states have call successors, (201) [2023-11-29 04:02:23,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2045 states to 2045 states and 3255 transitions. [2023-11-29 04:02:23,634 INFO L78 Accepts]: Start accepts. Automaton has 2045 states and 3255 transitions. Word has length 473 [2023-11-29 04:02:23,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:02:23,635 INFO L495 AbstractCegarLoop]: Abstraction has 2045 states and 3255 transitions. [2023-11-29 04:02:23,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:02:23,635 INFO L276 IsEmpty]: Start isEmpty. Operand 2045 states and 3255 transitions. [2023-11-29 04:02:23,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2023-11-29 04:02:23,643 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:02:23,644 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:02:23,653 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 04:02:23,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 04:02:23,848 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:02:23,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:02:23,849 INFO L85 PathProgramCache]: Analyzing trace with hash 20780839, now seen corresponding path program 1 times [2023-11-29 04:02:23,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:02:23,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657784543] [2023-11-29 04:02:23,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:23,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:02:23,925 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:02:23,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1195971479] [2023-11-29 04:02:23,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:23,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:23,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:02:23,927 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:02:23,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 04:02:24,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:02:24,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 1258 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 04:02:24,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:02:24,376 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2023-11-29 04:02:24,376 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:02:24,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:02:24,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657784543] [2023-11-29 04:02:24,376 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:02:24,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195971479] [2023-11-29 04:02:24,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195971479] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:02:24,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:02:24,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 04:02:24,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542132340] [2023-11-29 04:02:24,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:02:24,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:02:24,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:02:24,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:02:24,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:02:24,379 INFO L87 Difference]: Start difference. First operand 2045 states and 3255 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:02:24,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:02:24,871 INFO L93 Difference]: Finished difference Result 6670 states and 10666 transitions. [2023-11-29 04:02:24,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 04:02:24,872 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) Word has length 473 [2023-11-29 04:02:24,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:02:24,903 INFO L225 Difference]: With dead ends: 6670 [2023-11-29 04:02:24,903 INFO L226 Difference]: Without dead ends: 5705 [2023-11-29 04:02:24,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:02:24,907 INFO L413 NwaCegarLoop]: 869 mSDtfsCounter, 1022 mSDsluCounter, 1344 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 2213 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:02:24,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1022 Valid, 2213 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 04:02:24,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5705 states. [2023-11-29 04:02:25,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5705 to 3829. [2023-11-29 04:02:25,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3829 states, 3511 states have (on average 1.5610937054970093) internal successors, (5481), 3513 states have internal predecessors, (5481), 307 states have call successors, (307), 10 states have call predecessors, (307), 10 states have return successors, (307), 305 states have call predecessors, (307), 307 states have call successors, (307) [2023-11-29 04:02:25,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3829 states to 3829 states and 6095 transitions. [2023-11-29 04:02:25,125 INFO L78 Accepts]: Start accepts. Automaton has 3829 states and 6095 transitions. Word has length 473 [2023-11-29 04:02:25,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:02:25,125 INFO L495 AbstractCegarLoop]: Abstraction has 3829 states and 6095 transitions. [2023-11-29 04:02:25,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:02:25,126 INFO L276 IsEmpty]: Start isEmpty. Operand 3829 states and 6095 transitions. [2023-11-29 04:02:25,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2023-11-29 04:02:25,132 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:02:25,133 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:02:25,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-29 04:02:25,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 04:02:25,333 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:02:25,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:02:25,334 INFO L85 PathProgramCache]: Analyzing trace with hash -2056556059, now seen corresponding path program 1 times [2023-11-29 04:02:25,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:02:25,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036563783] [2023-11-29 04:02:25,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:25,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:02:25,398 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:02:25,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [386364117] [2023-11-29 04:02:25,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:25,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:25,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:02:25,400 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:02:25,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 04:02:25,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:02:25,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 1257 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 04:02:25,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:02:25,935 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2023-11-29 04:02:25,935 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:02:25,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:02:25,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036563783] [2023-11-29 04:02:25,935 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:02:25,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386364117] [2023-11-29 04:02:25,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386364117] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:02:25,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:02:25,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 04:02:25,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930585667] [2023-11-29 04:02:25,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:02:25,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:02:25,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:02:25,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:02:25,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:02:25,939 INFO L87 Difference]: Start difference. First operand 3829 states and 6095 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:02:26,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:02:26,398 INFO L93 Difference]: Finished difference Result 8237 states and 13076 transitions. [2023-11-29 04:02:26,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 04:02:26,399 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) Word has length 473 [2023-11-29 04:02:26,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:02:26,414 INFO L225 Difference]: With dead ends: 8237 [2023-11-29 04:02:26,414 INFO L226 Difference]: Without dead ends: 4525 [2023-11-29 04:02:26,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:02:26,419 INFO L413 NwaCegarLoop]: 647 mSDtfsCounter, 740 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 740 SdHoareTripleChecker+Valid, 1066 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:02:26,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [740 Valid, 1066 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 04:02:26,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4525 states. [2023-11-29 04:02:26,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4525 to 4381. [2023-11-29 04:02:26,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4381 states, 3850 states have (on average 1.5366233766233766) internal successors, (5916), 3856 states have internal predecessors, (5916), 511 states have call successors, (511), 19 states have call predecessors, (511), 19 states have return successors, (511), 505 states have call predecessors, (511), 511 states have call successors, (511) [2023-11-29 04:02:26,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4381 states to 4381 states and 6938 transitions. [2023-11-29 04:02:26,795 INFO L78 Accepts]: Start accepts. Automaton has 4381 states and 6938 transitions. Word has length 473 [2023-11-29 04:02:26,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:02:26,796 INFO L495 AbstractCegarLoop]: Abstraction has 4381 states and 6938 transitions. [2023-11-29 04:02:26,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:02:26,796 INFO L276 IsEmpty]: Start isEmpty. Operand 4381 states and 6938 transitions. [2023-11-29 04:02:26,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2023-11-29 04:02:26,802 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:02:26,802 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2023-11-29 04:02:26,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 04:02:27,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 04:02:27,003 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:02:27,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:02:27,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1929705632, now seen corresponding path program 1 times [2023-11-29 04:02:27,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:02:27,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889225443] [2023-11-29 04:02:27,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:27,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:02:27,071 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:02:27,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [333759236] [2023-11-29 04:02:27,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:27,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:27,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:02:27,073 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:02:27,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 04:02:27,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:02:27,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 1254 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 04:02:27,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:02:27,915 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2023-11-29 04:02:27,916 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:02:27,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:02:27,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889225443] [2023-11-29 04:02:27,916 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:02:27,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333759236] [2023-11-29 04:02:27,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333759236] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:02:27,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:02:27,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:02:27,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545513573] [2023-11-29 04:02:27,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:02:27,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:02:27,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:02:27,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:02:27,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:02:27,920 INFO L87 Difference]: Start difference. First operand 4381 states and 6938 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:02:28,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:02:28,819 INFO L93 Difference]: Finished difference Result 13673 states and 21646 transitions. [2023-11-29 04:02:28,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 04:02:28,820 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) Word has length 474 [2023-11-29 04:02:28,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:02:28,846 INFO L225 Difference]: With dead ends: 13673 [2023-11-29 04:02:28,846 INFO L226 Difference]: Without dead ends: 9413 [2023-11-29 04:02:28,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:02:28,856 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 872 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 872 SdHoareTripleChecker+Valid, 1254 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:02:28,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [872 Valid, 1254 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 04:02:28,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9413 states. [2023-11-29 04:02:29,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9413 to 5569. [2023-11-29 04:02:29,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5569 states, 4578 states have (on average 1.5050240279598077) internal successors, (6890), 4590 states have internal predecessors, (6890), 955 states have call successors, (955), 35 states have call predecessors, (955), 35 states have return successors, (955), 943 states have call predecessors, (955), 955 states have call successors, (955) [2023-11-29 04:02:29,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5569 states to 5569 states and 8800 transitions. [2023-11-29 04:02:29,478 INFO L78 Accepts]: Start accepts. Automaton has 5569 states and 8800 transitions. Word has length 474 [2023-11-29 04:02:29,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:02:29,479 INFO L495 AbstractCegarLoop]: Abstraction has 5569 states and 8800 transitions. [2023-11-29 04:02:29,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:02:29,479 INFO L276 IsEmpty]: Start isEmpty. Operand 5569 states and 8800 transitions. [2023-11-29 04:02:29,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2023-11-29 04:02:29,489 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:02:29,489 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2023-11-29 04:02:29,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 04:02:29,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 04:02:29,690 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:02:29,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:02:29,691 INFO L85 PathProgramCache]: Analyzing trace with hash 604849438, now seen corresponding path program 1 times [2023-11-29 04:02:29,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:02:29,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618345930] [2023-11-29 04:02:29,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:29,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:02:29,774 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:02:29,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2041957510] [2023-11-29 04:02:29,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:29,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:29,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:02:29,775 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:02:29,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 04:02:30,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:02:30,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 1257 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 04:02:30,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:02:30,268 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2023-11-29 04:02:30,269 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:02:30,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:02:30,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618345930] [2023-11-29 04:02:30,269 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:02:30,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041957510] [2023-11-29 04:02:30,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041957510] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:02:30,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:02:30,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 04:02:30,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589324760] [2023-11-29 04:02:30,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:02:30,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:02:30,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:02:30,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:02:30,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:02:30,272 INFO L87 Difference]: Start difference. First operand 5569 states and 8800 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:02:30,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:02:30,791 INFO L93 Difference]: Finished difference Result 14909 states and 23590 transitions. [2023-11-29 04:02:30,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 04:02:30,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) Word has length 474 [2023-11-29 04:02:30,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:02:30,809 INFO L225 Difference]: With dead ends: 14909 [2023-11-29 04:02:30,809 INFO L226 Difference]: Without dead ends: 9433 [2023-11-29 04:02:30,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:02:30,818 INFO L413 NwaCegarLoop]: 638 mSDtfsCounter, 233 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 1686 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:02:30,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 1686 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:02:30,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9433 states. [2023-11-29 04:02:31,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9433 to 5593. [2023-11-29 04:02:31,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5593 states, 4602 states have (on average 1.505432420686658) internal successors, (6928), 4614 states have internal predecessors, (6928), 955 states have call successors, (955), 35 states have call predecessors, (955), 35 states have return successors, (955), 943 states have call predecessors, (955), 955 states have call successors, (955) [2023-11-29 04:02:31,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5593 states to 5593 states and 8838 transitions. [2023-11-29 04:02:31,448 INFO L78 Accepts]: Start accepts. Automaton has 5593 states and 8838 transitions. Word has length 474 [2023-11-29 04:02:31,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:02:31,449 INFO L495 AbstractCegarLoop]: Abstraction has 5593 states and 8838 transitions. [2023-11-29 04:02:31,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:02:31,449 INFO L276 IsEmpty]: Start isEmpty. Operand 5593 states and 8838 transitions. [2023-11-29 04:02:31,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2023-11-29 04:02:31,455 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:02:31,455 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2023-11-29 04:02:31,463 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 04:02:31,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 04:02:31,656 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:02:31,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:02:31,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1404187000, now seen corresponding path program 1 times [2023-11-29 04:02:31,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:02:31,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079046124] [2023-11-29 04:02:31,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:31,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:02:31,725 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:02:31,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1728791133] [2023-11-29 04:02:31,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:31,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:31,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:02:31,727 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:02:31,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 04:02:32,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:02:32,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 1259 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 04:02:32,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:02:32,233 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2023-11-29 04:02:32,233 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:02:32,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:02:32,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079046124] [2023-11-29 04:02:32,234 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:02:32,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728791133] [2023-11-29 04:02:32,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728791133] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:02:32,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:02:32,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 04:02:32,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609944670] [2023-11-29 04:02:32,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:02:32,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 04:02:32,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:02:32,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 04:02:32,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:02:32,237 INFO L87 Difference]: Start difference. First operand 5593 states and 8838 transitions. Second operand has 5 states, 5 states have (on average 28.4) internal successors, (142), 5 states have internal predecessors, (142), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:02:33,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:02:33,653 INFO L93 Difference]: Finished difference Result 11272 states and 17760 transitions. [2023-11-29 04:02:33,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 04:02:33,653 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.4) internal successors, (142), 5 states have internal predecessors, (142), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) Word has length 474 [2023-11-29 04:02:33,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:02:33,668 INFO L225 Difference]: With dead ends: 11272 [2023-11-29 04:02:33,668 INFO L226 Difference]: Without dead ends: 5800 [2023-11-29 04:02:33,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-29 04:02:33,678 INFO L413 NwaCegarLoop]: 904 mSDtfsCounter, 1198 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1198 SdHoareTripleChecker+Valid, 1467 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 04:02:33,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1198 Valid, 1467 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 04:02:33,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5800 states. [2023-11-29 04:02:34,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5800 to 4169. [2023-11-29 04:02:34,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4169 states, 3178 states have (on average 1.4568911264946507) internal successors, (4630), 3190 states have internal predecessors, (4630), 955 states have call successors, (955), 35 states have call predecessors, (955), 35 states have return successors, (955), 943 states have call predecessors, (955), 955 states have call successors, (955) [2023-11-29 04:02:34,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4169 states to 4169 states and 6540 transitions. [2023-11-29 04:02:34,503 INFO L78 Accepts]: Start accepts. Automaton has 4169 states and 6540 transitions. Word has length 474 [2023-11-29 04:02:34,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:02:34,504 INFO L495 AbstractCegarLoop]: Abstraction has 4169 states and 6540 transitions. [2023-11-29 04:02:34,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.4) internal successors, (142), 5 states have internal predecessors, (142), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:02:34,504 INFO L276 IsEmpty]: Start isEmpty. Operand 4169 states and 6540 transitions. [2023-11-29 04:02:34,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2023-11-29 04:02:34,509 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:02:34,510 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2023-11-29 04:02:34,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 04:02:34,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 04:02:34,711 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:02:34,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:02:34,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1567590812, now seen corresponding path program 1 times [2023-11-29 04:02:34,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:02:34,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070520490] [2023-11-29 04:02:34,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:34,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:02:34,765 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:02:34,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1665280954] [2023-11-29 04:02:34,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:34,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:34,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:02:34,767 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:02:34,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 04:02:35,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:02:35,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 1261 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 04:02:35,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:02:35,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 3156 proven. 153 refuted. 0 times theorem prover too weak. 5535 trivial. 0 not checked. [2023-11-29 04:02:35,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:02:36,090 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 45 proven. 153 refuted. 0 times theorem prover too weak. 8646 trivial. 0 not checked. [2023-11-29 04:02:36,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:02:36,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070520490] [2023-11-29 04:02:36,090 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:02:36,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665280954] [2023-11-29 04:02:36,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665280954] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:02:36,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:02:36,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-29 04:02:36,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164060587] [2023-11-29 04:02:36,091 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:02:36,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 04:02:36,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:02:36,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 04:02:36,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-29 04:02:36,095 INFO L87 Difference]: Start difference. First operand 4169 states and 6540 transitions. Second operand has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 3 states have call successors, (118), 2 states have call predecessors, (118), 4 states have return successors, (119), 3 states have call predecessors, (119), 3 states have call successors, (119) [2023-11-29 04:02:37,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:02:37,388 INFO L93 Difference]: Finished difference Result 8349 states and 13004 transitions. [2023-11-29 04:02:37,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 04:02:37,390 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 3 states have call successors, (118), 2 states have call predecessors, (118), 4 states have return successors, (119), 3 states have call predecessors, (119), 3 states have call successors, (119) Word has length 474 [2023-11-29 04:02:37,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:02:37,406 INFO L225 Difference]: With dead ends: 8349 [2023-11-29 04:02:37,406 INFO L226 Difference]: Without dead ends: 4301 [2023-11-29 04:02:37,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 950 GetRequests, 938 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2023-11-29 04:02:37,418 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 334 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 04:02:37,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 1067 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 04:02:37,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4301 states. [2023-11-29 04:02:38,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4301 to 4231. [2023-11-29 04:02:38,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4231 states, 3223 states have (on average 1.4467887061743716) internal successors, (4663), 3235 states have internal predecessors, (4663), 955 states have call successors, (955), 52 states have call predecessors, (955), 52 states have return successors, (955), 943 states have call predecessors, (955), 955 states have call successors, (955) [2023-11-29 04:02:38,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4231 states to 4231 states and 6573 transitions. [2023-11-29 04:02:38,143 INFO L78 Accepts]: Start accepts. Automaton has 4231 states and 6573 transitions. Word has length 474 [2023-11-29 04:02:38,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:02:38,144 INFO L495 AbstractCegarLoop]: Abstraction has 4231 states and 6573 transitions. [2023-11-29 04:02:38,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 3 states have call successors, (118), 2 states have call predecessors, (118), 4 states have return successors, (119), 3 states have call predecessors, (119), 3 states have call successors, (119) [2023-11-29 04:02:38,144 INFO L276 IsEmpty]: Start isEmpty. Operand 4231 states and 6573 transitions. [2023-11-29 04:02:38,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2023-11-29 04:02:38,151 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:02:38,151 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2023-11-29 04:02:38,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 04:02:38,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 04:02:38,352 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:02:38,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:02:38,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1239222940, now seen corresponding path program 1 times [2023-11-29 04:02:38,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:02:38,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272994531] [2023-11-29 04:02:38,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:38,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:02:38,418 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:02:38,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1213630076] [2023-11-29 04:02:38,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:38,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:38,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:02:38,419 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:02:38,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 04:02:38,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:02:38,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 1261 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 04:02:38,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:02:39,104 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 3366 proven. 48 refuted. 0 times theorem prover too weak. 5430 trivial. 0 not checked. [2023-11-29 04:02:39,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:02:39,394 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 150 proven. 48 refuted. 0 times theorem prover too weak. 8646 trivial. 0 not checked. [2023-11-29 04:02:39,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:02:39,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272994531] [2023-11-29 04:02:39,394 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:02:39,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213630076] [2023-11-29 04:02:39,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213630076] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:02:39,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:02:39,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 04:02:39,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132716313] [2023-11-29 04:02:39,396 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:02:39,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:02:39,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:02:39,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:02:39,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:02:39,398 INFO L87 Difference]: Start difference. First operand 4231 states and 6573 transitions. Second operand has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 2 states have call successors, (83), 2 states have call predecessors, (83), 4 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) [2023-11-29 04:02:40,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:02:40,123 INFO L93 Difference]: Finished difference Result 6347 states and 9809 transitions. [2023-11-29 04:02:40,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 04:02:40,125 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 2 states have call successors, (83), 2 states have call predecessors, (83), 4 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) Word has length 474 [2023-11-29 04:02:40,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:02:40,129 INFO L225 Difference]: With dead ends: 6347 [2023-11-29 04:02:40,129 INFO L226 Difference]: Without dead ends: 2241 [2023-11-29 04:02:40,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 950 GetRequests, 940 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 04:02:40,137 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 308 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:02:40,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 919 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 04:02:40,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2241 states. [2023-11-29 04:02:40,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2241 to 1683. [2023-11-29 04:02:40,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1355 states have (on average 1.462730627306273) internal successors, (1982), 1357 states have internal predecessors, (1982), 307 states have call successors, (307), 20 states have call predecessors, (307), 20 states have return successors, (307), 305 states have call predecessors, (307), 307 states have call successors, (307) [2023-11-29 04:02:40,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 2596 transitions. [2023-11-29 04:02:40,343 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 2596 transitions. Word has length 474 [2023-11-29 04:02:40,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:02:40,344 INFO L495 AbstractCegarLoop]: Abstraction has 1683 states and 2596 transitions. [2023-11-29 04:02:40,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 2 states have call successors, (83), 2 states have call predecessors, (83), 4 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) [2023-11-29 04:02:40,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 2596 transitions. [2023-11-29 04:02:40,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2023-11-29 04:02:40,348 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:02:40,348 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:02:40,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 04:02:40,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 04:02:40,549 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:02:40,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:02:40,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1001420477, now seen corresponding path program 1 times [2023-11-29 04:02:40,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:02:40,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7926538] [2023-11-29 04:02:40,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:40,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:02:40,622 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:02:40,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1051021651] [2023-11-29 04:02:40,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:40,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:40,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:02:40,624 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:02:40,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 04:02:41,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:02:41,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 1265 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 04:02:41,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:02:41,190 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2023-11-29 04:02:41,190 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:02:41,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:02:41,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7926538] [2023-11-29 04:02:41,190 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:02:41,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051021651] [2023-11-29 04:02:41,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051021651] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:02:41,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:02:41,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:02:41,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665223685] [2023-11-29 04:02:41,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:02:41,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:02:41,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:02:41,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:02:41,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:02:41,194 INFO L87 Difference]: Start difference. First operand 1683 states and 2596 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:02:41,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:02:41,601 INFO L93 Difference]: Finished difference Result 3897 states and 5996 transitions. [2023-11-29 04:02:41,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:02:41,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) Word has length 475 [2023-11-29 04:02:41,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:02:41,606 INFO L225 Difference]: With dead ends: 3897 [2023-11-29 04:02:41,606 INFO L226 Difference]: Without dead ends: 2339 [2023-11-29 04:02:41,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:02:41,609 INFO L413 NwaCegarLoop]: 457 mSDtfsCounter, 390 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 868 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:02:41,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 868 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:02:41,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2339 states. [2023-11-29 04:02:41,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2339 to 1683. [2023-11-29 04:02:41,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1355 states have (on average 1.4509225092250924) internal successors, (1966), 1357 states have internal predecessors, (1966), 307 states have call successors, (307), 20 states have call predecessors, (307), 20 states have return successors, (307), 305 states have call predecessors, (307), 307 states have call successors, (307) [2023-11-29 04:02:41,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 2580 transitions. [2023-11-29 04:02:41,825 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 2580 transitions. Word has length 475 [2023-11-29 04:02:41,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:02:41,825 INFO L495 AbstractCegarLoop]: Abstraction has 1683 states and 2580 transitions. [2023-11-29 04:02:41,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:02:41,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 2580 transitions. [2023-11-29 04:02:41,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2023-11-29 04:02:41,829 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:02:41,829 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:02:41,837 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 04:02:42,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:42,030 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:02:42,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:02:42,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1755206789, now seen corresponding path program 1 times [2023-11-29 04:02:42,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:02:42,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467893434] [2023-11-29 04:02:42,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:42,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:02:42,099 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:02:42,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [143101831] [2023-11-29 04:02:42,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:42,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:42,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:02:42,101 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:02:42,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 04:02:42,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:02:42,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 1264 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 04:02:42,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:02:43,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2023-11-29 04:02:43,108 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:02:43,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:02:43,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467893434] [2023-11-29 04:02:43,108 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:02:43,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143101831] [2023-11-29 04:02:43,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143101831] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:02:43,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:02:43,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 04:02:43,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879958856] [2023-11-29 04:02:43,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:02:43,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 04:02:43,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:02:43,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 04:02:43,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:02:43,112 INFO L87 Difference]: Start difference. First operand 1683 states and 2580 transitions. Second operand has 5 states, 5 states have (on average 28.6) internal successors, (143), 4 states have internal predecessors, (143), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:02:43,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:02:43,803 INFO L93 Difference]: Finished difference Result 3423 states and 5229 transitions. [2023-11-29 04:02:43,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 04:02:43,804 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.6) internal successors, (143), 4 states have internal predecessors, (143), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) Word has length 475 [2023-11-29 04:02:43,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:02:43,808 INFO L225 Difference]: With dead ends: 3423 [2023-11-29 04:02:43,808 INFO L226 Difference]: Without dead ends: 1865 [2023-11-29 04:02:43,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:02:43,811 INFO L413 NwaCegarLoop]: 764 mSDtfsCounter, 967 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 967 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:02:43,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [967 Valid, 1094 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 04:02:43,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1865 states. [2023-11-29 04:02:44,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1865 to 1795. [2023-11-29 04:02:44,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1795 states, 1322 states have (on average 1.3956127080181544) internal successors, (1845), 1326 states have internal predecessors, (1845), 441 states have call successors, (441), 31 states have call predecessors, (441), 31 states have return successors, (441), 437 states have call predecessors, (441), 441 states have call successors, (441) [2023-11-29 04:02:44,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1795 states to 1795 states and 2727 transitions. [2023-11-29 04:02:44,238 INFO L78 Accepts]: Start accepts. Automaton has 1795 states and 2727 transitions. Word has length 475 [2023-11-29 04:02:44,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:02:44,239 INFO L495 AbstractCegarLoop]: Abstraction has 1795 states and 2727 transitions. [2023-11-29 04:02:44,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.6) internal successors, (143), 4 states have internal predecessors, (143), 1 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 1 states have call successors, (67) [2023-11-29 04:02:44,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 2727 transitions. [2023-11-29 04:02:44,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2023-11-29 04:02:44,243 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:02:44,243 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:02:44,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 04:02:44,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:44,444 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:02:44,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:02:44,444 INFO L85 PathProgramCache]: Analyzing trace with hash -916173127, now seen corresponding path program 1 times [2023-11-29 04:02:44,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:02:44,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9107043] [2023-11-29 04:02:44,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:44,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:02:44,509 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:02:44,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [358155979] [2023-11-29 04:02:44,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:44,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:44,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:02:44,511 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:02:44,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 04:02:44,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:02:44,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 1263 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 04:02:44,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:02:45,947 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 4702 proven. 216 refuted. 0 times theorem prover too weak. 3926 trivial. 0 not checked. [2023-11-29 04:02:45,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:02:46,400 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 174 proven. 219 refuted. 0 times theorem prover too weak. 8451 trivial. 0 not checked. [2023-11-29 04:02:46,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:02:46,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9107043] [2023-11-29 04:02:46,401 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:02:46,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358155979] [2023-11-29 04:02:46,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358155979] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:02:46,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:02:46,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2023-11-29 04:02:46,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599403405] [2023-11-29 04:02:46,402 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:02:46,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 04:02:46,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:02:46,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 04:02:46,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2023-11-29 04:02:46,405 INFO L87 Difference]: Start difference. First operand 1795 states and 2727 transitions. Second operand has 18 states, 18 states have (on average 14.11111111111111) internal successors, (254), 18 states have internal predecessors, (254), 5 states have call successors, (105), 3 states have call predecessors, (105), 7 states have return successors, (106), 5 states have call predecessors, (106), 5 states have call successors, (106) [2023-11-29 04:02:48,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:02:48,375 INFO L93 Difference]: Finished difference Result 4152 states and 6231 transitions. [2023-11-29 04:02:48,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-29 04:02:48,376 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 14.11111111111111) internal successors, (254), 18 states have internal predecessors, (254), 5 states have call successors, (105), 3 states have call predecessors, (105), 7 states have return successors, (106), 5 states have call predecessors, (106), 5 states have call successors, (106) Word has length 475 [2023-11-29 04:02:48,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:02:48,381 INFO L225 Difference]: With dead ends: 4152 [2023-11-29 04:02:48,381 INFO L226 Difference]: Without dead ends: 2486 [2023-11-29 04:02:48,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 976 GetRequests, 935 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=479, Invalid=1327, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 04:02:48,384 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 1686 mSDsluCounter, 1387 mSDsCounter, 0 mSdLazyCounter, 1295 mSolverCounterSat, 542 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1716 SdHoareTripleChecker+Valid, 1753 SdHoareTripleChecker+Invalid, 1837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 542 IncrementalHoareTripleChecker+Valid, 1295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:02:48,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1716 Valid, 1753 Invalid, 1837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [542 Valid, 1295 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 04:02:48,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2023-11-29 04:02:48,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 2249. [2023-11-29 04:02:48,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2249 states, 1661 states have (on average 1.3853100541842265) internal successors, (2301), 1668 states have internal predecessors, (2301), 531 states have call successors, (531), 56 states have call predecessors, (531), 56 states have return successors, (531), 524 states have call predecessors, (531), 531 states have call successors, (531) [2023-11-29 04:02:48,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2249 states to 2249 states and 3363 transitions. [2023-11-29 04:02:48,773 INFO L78 Accepts]: Start accepts. Automaton has 2249 states and 3363 transitions. Word has length 475 [2023-11-29 04:02:48,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:02:48,774 INFO L495 AbstractCegarLoop]: Abstraction has 2249 states and 3363 transitions. [2023-11-29 04:02:48,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 14.11111111111111) internal successors, (254), 18 states have internal predecessors, (254), 5 states have call successors, (105), 3 states have call predecessors, (105), 7 states have return successors, (106), 5 states have call predecessors, (106), 5 states have call successors, (106) [2023-11-29 04:02:48,774 INFO L276 IsEmpty]: Start isEmpty. Operand 2249 states and 3363 transitions. [2023-11-29 04:02:48,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2023-11-29 04:02:48,779 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:02:48,779 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:02:48,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 04:02:48,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:48,980 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:02:48,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:02:48,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1425646217, now seen corresponding path program 1 times [2023-11-29 04:02:48,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:02:48,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774021035] [2023-11-29 04:02:48,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:48,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:02:49,042 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:02:49,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1153333831] [2023-11-29 04:02:49,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:49,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:49,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:02:49,043 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:02:49,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 04:02:49,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:02:49,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 1263 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 04:02:49,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:02:51,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 5376 proven. 219 refuted. 0 times theorem prover too weak. 3249 trivial. 0 not checked. [2023-11-29 04:02:51,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:02:53,044 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 171 proven. 222 refuted. 0 times theorem prover too weak. 8451 trivial. 0 not checked. [2023-11-29 04:02:53,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:02:53,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774021035] [2023-11-29 04:02:53,045 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:02:53,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153333831] [2023-11-29 04:02:53,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153333831] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:02:53,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:02:53,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2023-11-29 04:02:53,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352255525] [2023-11-29 04:02:53,046 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:02:53,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 04:02:53,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:02:53,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 04:02:53,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2023-11-29 04:02:53,050 INFO L87 Difference]: Start difference. First operand 2249 states and 3363 transitions. Second operand has 27 states, 27 states have (on average 10.88888888888889) internal successors, (294), 27 states have internal predecessors, (294), 8 states have call successors, (134), 5 states have call predecessors, (134), 9 states have return successors, (134), 8 states have call predecessors, (134), 8 states have call successors, (134) [2023-11-29 04:02:59,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:02:59,657 INFO L93 Difference]: Finished difference Result 6559 states and 9626 transitions. [2023-11-29 04:02:59,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-11-29 04:02:59,658 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 10.88888888888889) internal successors, (294), 27 states have internal predecessors, (294), 8 states have call successors, (134), 5 states have call predecessors, (134), 9 states have return successors, (134), 8 states have call predecessors, (134), 8 states have call successors, (134) Word has length 475 [2023-11-29 04:02:59,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:02:59,665 INFO L225 Difference]: With dead ends: 6559 [2023-11-29 04:02:59,665 INFO L226 Difference]: Without dead ends: 4455 [2023-11-29 04:02:59,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1036 GetRequests, 935 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3331 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2284, Invalid=8222, Unknown=0, NotChecked=0, Total=10506 [2023-11-29 04:02:59,672 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 2064 mSDsluCounter, 3071 mSDsCounter, 0 mSdLazyCounter, 3511 mSolverCounterSat, 1315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2092 SdHoareTripleChecker+Valid, 3581 SdHoareTripleChecker+Invalid, 4826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1315 IncrementalHoareTripleChecker+Valid, 3511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-29 04:02:59,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2092 Valid, 3581 Invalid, 4826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1315 Valid, 3511 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-11-29 04:02:59,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4455 states. [2023-11-29 04:03:00,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4455 to 3435. [2023-11-29 04:03:00,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 2627 states have (on average 1.401598781880472) internal successors, (3682), 2636 states have internal predecessors, (3682), 707 states have call successors, (707), 100 states have call predecessors, (707), 100 states have return successors, (707), 698 states have call predecessors, (707), 707 states have call successors, (707) [2023-11-29 04:03:00,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 5096 transitions. [2023-11-29 04:03:00,249 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 5096 transitions. Word has length 475 [2023-11-29 04:03:00,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:03:00,249 INFO L495 AbstractCegarLoop]: Abstraction has 3435 states and 5096 transitions. [2023-11-29 04:03:00,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 10.88888888888889) internal successors, (294), 27 states have internal predecessors, (294), 8 states have call successors, (134), 5 states have call predecessors, (134), 9 states have return successors, (134), 8 states have call predecessors, (134), 8 states have call successors, (134) [2023-11-29 04:03:00,250 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 5096 transitions. [2023-11-29 04:03:00,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2023-11-29 04:03:00,255 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:03:00,255 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:03:00,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-29 04:03:00,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:03:00,456 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:03:00,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:03:00,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1858203829, now seen corresponding path program 1 times [2023-11-29 04:03:00,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:03:00,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15715415] [2023-11-29 04:03:00,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:03:00,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:03:00,521 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:03:00,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1690961259] [2023-11-29 04:03:00,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:03:00,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:03:00,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:03:00,523 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:03:00,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 04:03:01,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:03:01,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 1263 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 04:03:01,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:03:02,010 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 5739 proven. 231 refuted. 0 times theorem prover too weak. 2874 trivial. 0 not checked. [2023-11-29 04:03:02,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:03:03,445 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 159 proven. 234 refuted. 0 times theorem prover too weak. 8451 trivial. 0 not checked. [2023-11-29 04:03:03,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:03:03,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15715415] [2023-11-29 04:03:03,446 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:03:03,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690961259] [2023-11-29 04:03:03,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690961259] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:03:03,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:03:03,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2023-11-29 04:03:03,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170688643] [2023-11-29 04:03:03,447 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:03:03,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 04:03:03,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:03:03,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 04:03:03,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2023-11-29 04:03:03,449 INFO L87 Difference]: Start difference. First operand 3435 states and 5096 transitions. Second operand has 23 states, 23 states have (on average 11.565217391304348) internal successors, (266), 23 states have internal predecessors, (266), 5 states have call successors, (118), 3 states have call predecessors, (118), 7 states have return successors, (119), 5 states have call predecessors, (119), 5 states have call successors, (119) [2023-11-29 04:03:06,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:03:06,408 INFO L93 Difference]: Finished difference Result 10581 states and 15769 transitions. [2023-11-29 04:03:06,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 04:03:06,409 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 11.565217391304348) internal successors, (266), 23 states have internal predecessors, (266), 5 states have call successors, (118), 3 states have call predecessors, (118), 7 states have return successors, (119), 5 states have call predecessors, (119), 5 states have call successors, (119) Word has length 475 [2023-11-29 04:03:06,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:03:06,418 INFO L225 Difference]: With dead ends: 10581 [2023-11-29 04:03:06,418 INFO L226 Difference]: Without dead ends: 7299 [2023-11-29 04:03:06,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 966 GetRequests, 928 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=421, Invalid=1139, Unknown=0, NotChecked=0, Total=1560 [2023-11-29 04:03:06,423 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 1809 mSDsluCounter, 2312 mSDsCounter, 0 mSdLazyCounter, 1742 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1840 SdHoareTripleChecker+Valid, 2631 SdHoareTripleChecker+Invalid, 2021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 1742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-29 04:03:06,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1840 Valid, 2631 Invalid, 2021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 1742 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-29 04:03:06,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7299 states. [2023-11-29 04:03:07,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7299 to 4295. [2023-11-29 04:03:07,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4295 states, 3464 states have (on average 1.428406466512702) internal successors, (4948), 3473 states have internal predecessors, (4948), 707 states have call successors, (707), 123 states have call predecessors, (707), 123 states have return successors, (707), 698 states have call predecessors, (707), 707 states have call successors, (707) [2023-11-29 04:03:07,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4295 states to 4295 states and 6362 transitions. [2023-11-29 04:03:07,037 INFO L78 Accepts]: Start accepts. Automaton has 4295 states and 6362 transitions. Word has length 475 [2023-11-29 04:03:07,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:03:07,037 INFO L495 AbstractCegarLoop]: Abstraction has 4295 states and 6362 transitions. [2023-11-29 04:03:07,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 11.565217391304348) internal successors, (266), 23 states have internal predecessors, (266), 5 states have call successors, (118), 3 states have call predecessors, (118), 7 states have return successors, (119), 5 states have call predecessors, (119), 5 states have call successors, (119) [2023-11-29 04:03:07,038 INFO L276 IsEmpty]: Start isEmpty. Operand 4295 states and 6362 transitions. [2023-11-29 04:03:07,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2023-11-29 04:03:07,042 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:03:07,042 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:03:07,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-29 04:03:07,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 04:03:07,243 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:03:07,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:03:07,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1998752439, now seen corresponding path program 1 times [2023-11-29 04:03:07,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:03:07,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637006022] [2023-11-29 04:03:07,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:03:07,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:03:07,303 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:03:07,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [714285597] [2023-11-29 04:03:07,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:03:07,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:03:07,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:03:07,305 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:03:07,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_670c08c4-2ed9-4739-bb62-127425d4113e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 04:03:07,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:03:07,863 INFO L262 TraceCheckSpWp]: Trace formula consists of 1261 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-29 04:03:07,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:03:11,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 6275 proven. 573 refuted. 0 times theorem prover too weak. 1996 trivial. 0 not checked. [2023-11-29 04:03:11,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:03:36,301 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 4 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 04:04:16,974 WARN L293 SmtUtils]: Spent 13.80s on a formula simplification. DAG size of input: 48 DAG size of output: 33 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 04:04:21,005 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 687 proven. 634 refuted. 2 times theorem prover too weak. 7521 trivial. 0 not checked. [2023-11-29 04:04:21,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:04:21,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637006022] [2023-11-29 04:04:21,006 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:04:21,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714285597] [2023-11-29 04:04:21,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714285597] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:04:21,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:04:21,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 52 [2023-11-29 04:04:21,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196905595] [2023-11-29 04:04:21,007 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:04:21,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-11-29 04:04:21,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:04:21,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-11-29 04:04:21,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=660, Invalid=1989, Unknown=3, NotChecked=0, Total=2652 [2023-11-29 04:04:21,012 INFO L87 Difference]: Start difference. First operand 4295 states and 6362 transitions. Second operand has 52 states, 48 states have (on average 6.3125) internal successors, (303), 46 states have internal predecessors, (303), 18 states have call successors, (134), 10 states have call predecessors, (134), 20 states have return successors, (134), 16 states have call predecessors, (134), 18 states have call successors, (134) [2023-11-29 04:04:25,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:04:27,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:04:33,721 WARN L293 SmtUtils]: Spent 6.10s on a formula simplification. DAG size of input: 68 DAG size of output: 62 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 04:04:42,764 WARN L293 SmtUtils]: Spent 8.96s on a formula simplification. DAG size of input: 70 DAG size of output: 64 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 04:04:46,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:04:50,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:05:04,456 WARN L293 SmtUtils]: Spent 12.73s on a formula simplification. DAG size of input: 74 DAG size of output: 68 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 04:05:09,364 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:05:13,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:05:40,832 WARN L293 SmtUtils]: Spent 15.58s on a formula simplification. DAG size of input: 76 DAG size of output: 68 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 04:05:44,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:05:46,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:05:50,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:05:56,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:05:58,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.53s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:06:02,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:06:06,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:06:08,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:06:13,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:06:17,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:06:21,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:06:25,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:06:27,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:06:31,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:06:32,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:06:36,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:06:40,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:06:44,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:06:47,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.23s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:06:51,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:06:55,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:06:56,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:06:59,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.47s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:07:03,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:07:08,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:07:13,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:07:14,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:07:18,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:07:21,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:07:25,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:07:28,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.68s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:07:32,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:07:46,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:08:04,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 04:08:07,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:08:09,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.51s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:08:18,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:08:24,131 WARN L293 SmtUtils]: Spent 5.06s on a formula simplification. DAG size of input: 72 DAG size of output: 65 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 04:08:30,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:08:39,103 WARN L293 SmtUtils]: Spent 8.27s on a formula simplification. DAG size of input: 69 DAG size of output: 68 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 04:08:44,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:08:46,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:08:58,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:09:09,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:09:18,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:09:27,371 WARN L293 SmtUtils]: Spent 9.03s on a formula simplification. DAG size of input: 71 DAG size of output: 64 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 04:09:42,692 WARN L293 SmtUtils]: Spent 13.93s on a formula simplification. DAG size of input: 76 DAG size of output: 69 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 04:09:46,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:10:10,892 WARN L293 SmtUtils]: Spent 13.32s on a formula simplification. DAG size of input: 80 DAG size of output: 71 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 04:10:30,708 WARN L293 SmtUtils]: Spent 16.45s on a formula simplification. DAG size of input: 98 DAG size of output: 68 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 04:10:47,286 WARN L293 SmtUtils]: Spent 16.18s on a formula simplification. DAG size of input: 100 DAG size of output: 68 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 04:10:51,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:10:55,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:12:06,251 WARN L293 SmtUtils]: Spent 1.10m on a formula simplification. DAG size of input: 99 DAG size of output: 78 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 04:13:36,662 WARN L293 SmtUtils]: Spent 1.30m on a formula simplification. DAG size of input: 97 DAG size of output: 80 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 04:13:40,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:13:42,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:13:44,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:13:48,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:13:52,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:13:58,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:14:02,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:14:06,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.16s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:14:10,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:14:12,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.31s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:14:16,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.93s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:14:20,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:14:24,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:14:28,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:14:31,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.28s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:14:35,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:14:39,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:14:43,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:14:48,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:14:52,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:14:57,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 04:16:14,680 WARN L293 SmtUtils]: Spent 1.08m on a formula simplification. DAG size of input: 99 DAG size of output: 83 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)