./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-90.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_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-90.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme --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 aed545729ad989c8c40e84d3e267f99bbd3da53e52f3c825ab93de12dff6c66d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:48:00,877 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:48:00,955 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:48:00,962 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:48:00,963 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:48:00,989 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:48:00,989 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:48:00,990 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:48:00,991 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:48:00,991 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:48:00,992 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:48:00,993 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:48:00,994 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:48:00,994 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:48:00,995 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:48:00,996 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:48:00,996 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:48:00,997 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:48:00,997 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:48:00,998 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:48:00,999 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:48:00,999 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:48:01,000 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:48:01,001 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:48:01,001 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:48:01,002 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:48:01,002 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:48:01,003 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:48:01,003 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:48:01,004 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:48:01,004 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:48:01,005 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:48:01,005 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:48:01,006 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:48:01,006 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:48:01,007 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:48:01,007 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:48:01,007 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:48:01,008 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:48:01,008 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:48:01,008 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:48:01,009 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:48:01,009 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_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aed545729ad989c8c40e84d3e267f99bbd3da53e52f3c825ab93de12dff6c66d [2023-11-26 11:48:01,259 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:48:01,280 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:48:01,283 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:48:01,284 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:48:01,285 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:48:01,286 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-90.i [2023-11-26 11:48:04,453 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:48:04,808 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:48:04,809 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-90.i [2023-11-26 11:48:04,824 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/data/81b689fb6/d29dc3877531419ab7b9a2af9ad83de7/FLAG9fd2a58cd [2023-11-26 11:48:04,840 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/data/81b689fb6/d29dc3877531419ab7b9a2af9ad83de7 [2023-11-26 11:48:04,843 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:48:04,844 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:48:04,846 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:48:04,846 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:48:04,860 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:48:04,861 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:48:04" (1/1) ... [2023-11-26 11:48:04,862 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7419c5b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:04, skipping insertion in model container [2023-11-26 11:48:04,862 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:48:04" (1/1) ... [2023-11-26 11:48:04,925 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:48:05,113 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_a3bde4c6-c432-4186-afcc-1678a1ddb527/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-90.i[916,929] [2023-11-26 11:48:05,295 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:48:05,311 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:48:05,324 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_a3bde4c6-c432-4186-afcc-1678a1ddb527/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-90.i[916,929] [2023-11-26 11:48:05,416 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:48:05,438 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:48:05,438 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:05 WrapperNode [2023-11-26 11:48:05,439 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:48:05,440 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:48:05,440 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:48:05,440 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:48:05,449 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:05" (1/1) ... [2023-11-26 11:48:05,473 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:05" (1/1) ... [2023-11-26 11:48:05,566 INFO L138 Inliner]: procedures = 26, calls = 68, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 394 [2023-11-26 11:48:05,567 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:48:05,567 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:48:05,568 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:48:05,568 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:48:05,580 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:05" (1/1) ... [2023-11-26 11:48:05,581 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:05" (1/1) ... [2023-11-26 11:48:05,606 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:05" (1/1) ... [2023-11-26 11:48:05,671 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]. [2023-11-26 11:48:05,671 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:05" (1/1) ... [2023-11-26 11:48:05,672 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:05" (1/1) ... [2023-11-26 11:48:05,704 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:05" (1/1) ... [2023-11-26 11:48:05,711 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:05" (1/1) ... [2023-11-26 11:48:05,729 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:05" (1/1) ... [2023-11-26 11:48:05,735 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:05" (1/1) ... [2023-11-26 11:48:05,758 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:48:05,766 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:48:05,766 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:48:05,766 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:48:05,767 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:05" (1/1) ... [2023-11-26 11:48:05,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:48:05,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:05,804 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:48:05,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:48:05,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:48:05,893 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 11:48:05,893 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 11:48:05,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:48:05,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:48:05,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:48:06,096 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:48:06,099 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:48:07,026 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:48:07,106 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:48:07,106 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:48:07,107 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:48:07 BoogieIcfgContainer [2023-11-26 11:48:07,107 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:48:07,111 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:48:07,111 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:48:07,116 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:48:07,116 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:48:04" (1/3) ... [2023-11-26 11:48:07,117 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76519b3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:48:07, skipping insertion in model container [2023-11-26 11:48:07,118 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:05" (2/3) ... [2023-11-26 11:48:07,120 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76519b3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:48:07, skipping insertion in model container [2023-11-26 11:48:07,120 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:48:07" (3/3) ... [2023-11-26 11:48:07,122 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-90.i [2023-11-26 11:48:07,147 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:48:07,148 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:48:07,226 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:48:07,235 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;@34d3f391, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:48:07,235 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:48:07,241 INFO L276 IsEmpty]: Start isEmpty. Operand has 153 states, 95 states have (on average 1.4736842105263157) internal successors, (140), 96 states have internal predecessors, (140), 55 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2023-11-26 11:48:07,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2023-11-26 11:48:07,284 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:07,286 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:07,287 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:48:07,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:07,295 INFO L85 PathProgramCache]: Analyzing trace with hash -400446013, now seen corresponding path program 1 times [2023-11-26 11:48:07,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:07,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050162950] [2023-11-26 11:48:07,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:07,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:07,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:07,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:07,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050162950] [2023-11-26 11:48:07,775 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 11:48:07,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205656956] [2023-11-26 11:48:07,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:07,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:07,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:07,781 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:07,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:48:08,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:08,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 11:48:08,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:08,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 5832 trivial. 0 not checked. [2023-11-26 11:48:08,342 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:48:08,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205656956] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:08,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:08,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:48:08,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734292452] [2023-11-26 11:48:08,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:08,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:48:08,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:08,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:48:08,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:48:08,402 INFO L87 Difference]: Start difference. First operand has 153 states, 95 states have (on average 1.4736842105263157) internal successors, (140), 96 states have internal predecessors, (140), 55 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) Second operand has 2 states, 2 states have (on average 38.5) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (55), 2 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 2 states have call successors, (55) [2023-11-26 11:48:08,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:08,465 INFO L93 Difference]: Finished difference Result 303 states and 553 transitions. [2023-11-26 11:48:08,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:48:08,469 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 38.5) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (55), 2 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 2 states have call successors, (55) Word has length 347 [2023-11-26 11:48:08,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:08,479 INFO L225 Difference]: With dead ends: 303 [2023-11-26 11:48:08,479 INFO L226 Difference]: Without dead ends: 151 [2023-11-26 11:48:08,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:48:08,491 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:08,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 242 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:48:08,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-11-26 11:48:08,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2023-11-26 11:48:08,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 94 states have (on average 1.4361702127659575) internal successors, (135), 94 states have internal predecessors, (135), 55 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2023-11-26 11:48:08,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 245 transitions. [2023-11-26 11:48:08,564 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 245 transitions. Word has length 347 [2023-11-26 11:48:08,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:08,565 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 245 transitions. [2023-11-26 11:48:08,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 38.5) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (55), 2 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 2 states have call successors, (55) [2023-11-26 11:48:08,580 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 245 transitions. [2023-11-26 11:48:08,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2023-11-26 11:48:08,592 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:08,593 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:08,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 11:48:08,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 11:48:08,801 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:48:08,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:08,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1690543041, now seen corresponding path program 1 times [2023-11-26 11:48:08,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:08,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661680194] [2023-11-26 11:48:08,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:08,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:08,938 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:48:08,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1089440230] [2023-11-26 11:48:08,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:08,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:08,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:08,940 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:08,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:48:09,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:09,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:48:09,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:09,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5940 trivial. 0 not checked. [2023-11-26 11:48:09,372 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:48:09,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:09,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661680194] [2023-11-26 11:48:09,373 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:48:09,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089440230] [2023-11-26 11:48:09,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089440230] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:09,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:09,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:48:09,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120902521] [2023-11-26 11:48:09,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:09,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:48:09,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:09,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:48:09,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:48:09,383 INFO L87 Difference]: Start difference. First operand 151 states and 245 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 1 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 1 states have call successors, (55) [2023-11-26 11:48:09,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:09,955 INFO L93 Difference]: Finished difference Result 659 states and 1067 transitions. [2023-11-26 11:48:09,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:48:09,956 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 1 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 1 states have call successors, (55) Word has length 347 [2023-11-26 11:48:09,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:09,965 INFO L225 Difference]: With dead ends: 659 [2023-11-26 11:48:09,965 INFO L226 Difference]: Without dead ends: 509 [2023-11-26 11:48:09,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:48:09,968 INFO L413 NwaCegarLoop]: 517 mSDtfsCounter, 476 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:09,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [476 Valid, 905 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:48:09,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2023-11-26 11:48:10,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 280. [2023-11-26 11:48:10,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 184 states have (on average 1.4728260869565217) internal successors, (271), 185 states have internal predecessors, (271), 93 states have call successors, (93), 2 states have call predecessors, (93), 2 states have return successors, (93), 92 states have call predecessors, (93), 93 states have call successors, (93) [2023-11-26 11:48:10,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 457 transitions. [2023-11-26 11:48:10,070 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 457 transitions. Word has length 347 [2023-11-26 11:48:10,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:10,074 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 457 transitions. [2023-11-26 11:48:10,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 1 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 1 states have call successors, (55) [2023-11-26 11:48:10,075 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 457 transitions. [2023-11-26 11:48:10,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2023-11-26 11:48:10,083 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:10,083 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:10,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:10,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:10,292 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:48:10,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:10,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1296176255, now seen corresponding path program 1 times [2023-11-26 11:48:10,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:10,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155279493] [2023-11-26 11:48:10,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:10,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:10,409 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:48:10,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [896945597] [2023-11-26 11:48:10,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:10,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:10,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:10,416 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:10,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:48:10,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:10,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:48:10,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:11,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 2892 proven. 63 refuted. 0 times theorem prover too weak. 2985 trivial. 0 not checked. [2023-11-26 11:48:11,025 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:48:11,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 99 proven. 63 refuted. 0 times theorem prover too weak. 5778 trivial. 0 not checked. [2023-11-26 11:48:11,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:11,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155279493] [2023-11-26 11:48:11,433 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:48:11,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896945597] [2023-11-26 11:48:11,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896945597] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:48:11,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:48:11,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-26 11:48:11,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507304315] [2023-11-26 11:48:11,435 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:48:11,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:48:11,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:11,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:48:11,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:48:11,438 INFO L87 Difference]: Start difference. First operand 280 states and 457 transitions. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 3 states have call successors, (76), 2 states have call predecessors, (76), 4 states have return successors, (77), 3 states have call predecessors, (77), 3 states have call successors, (77) [2023-11-26 11:48:11,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:11,990 INFO L93 Difference]: Finished difference Result 569 states and 921 transitions. [2023-11-26 11:48:11,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:48:11,991 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 3 states have call successors, (76), 2 states have call predecessors, (76), 4 states have return successors, (77), 3 states have call predecessors, (77), 3 states have call successors, (77) Word has length 347 [2023-11-26 11:48:11,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:11,997 INFO L225 Difference]: With dead ends: 569 [2023-11-26 11:48:11,997 INFO L226 Difference]: Without dead ends: 290 [2023-11-26 11:48:11,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 696 GetRequests, 686 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:48:12,000 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 365 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:12,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [398 Valid, 421 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 11:48:12,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2023-11-26 11:48:12,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 288. [2023-11-26 11:48:12,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 190 states have (on average 1.4421052631578948) internal successors, (274), 191 states have internal predecessors, (274), 93 states have call successors, (93), 4 states have call predecessors, (93), 4 states have return successors, (93), 92 states have call predecessors, (93), 93 states have call successors, (93) [2023-11-26 11:48:12,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 460 transitions. [2023-11-26 11:48:12,049 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 460 transitions. Word has length 347 [2023-11-26 11:48:12,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:12,051 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 460 transitions. [2023-11-26 11:48:12,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 3 states have call successors, (76), 2 states have call predecessors, (76), 4 states have return successors, (77), 3 states have call predecessors, (77), 3 states have call successors, (77) [2023-11-26 11:48:12,051 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 460 transitions. [2023-11-26 11:48:12,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2023-11-26 11:48:12,058 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:12,058 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:12,070 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-26 11:48:12,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:12,267 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:48:12,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:12,268 INFO L85 PathProgramCache]: Analyzing trace with hash -623349082, now seen corresponding path program 1 times [2023-11-26 11:48:12,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:12,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869655584] [2023-11-26 11:48:12,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:12,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:12,333 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:48:12,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [636400090] [2023-11-26 11:48:12,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:12,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:12,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:12,336 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:12,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:48:12,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:12,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 835 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:48:12,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:12,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5940 trivial. 0 not checked. [2023-11-26 11:48:12,715 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:48:12,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:12,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869655584] [2023-11-26 11:48:12,716 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:48:12,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636400090] [2023-11-26 11:48:12,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636400090] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:12,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:12,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:48:12,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283924630] [2023-11-26 11:48:12,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:12,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:48:12,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:12,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:48:12,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:48:12,720 INFO L87 Difference]: Start difference. First operand 288 states and 460 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 1 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 1 states have call successors, (55) [2023-11-26 11:48:12,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:12,815 INFO L93 Difference]: Finished difference Result 663 states and 1064 transitions. [2023-11-26 11:48:12,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:48:12,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 1 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 1 states have call successors, (55) Word has length 348 [2023-11-26 11:48:12,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:12,820 INFO L225 Difference]: With dead ends: 663 [2023-11-26 11:48:12,821 INFO L226 Difference]: Without dead ends: 376 [2023-11-26 11:48:12,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:48:12,823 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 69 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:12,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 470 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:48:12,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2023-11-26 11:48:12,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 364. [2023-11-26 11:48:12,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 266 states have (on average 1.5112781954887218) internal successors, (402), 267 states have internal predecessors, (402), 93 states have call successors, (93), 4 states have call predecessors, (93), 4 states have return successors, (93), 92 states have call predecessors, (93), 93 states have call successors, (93) [2023-11-26 11:48:12,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 588 transitions. [2023-11-26 11:48:12,875 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 588 transitions. Word has length 348 [2023-11-26 11:48:12,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:12,877 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 588 transitions. [2023-11-26 11:48:12,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 1 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 1 states have call successors, (55) [2023-11-26 11:48:12,877 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 588 transitions. [2023-11-26 11:48:12,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2023-11-26 11:48:12,883 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:12,883 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:12,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:13,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:13,092 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:48:13,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:13,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1132822172, now seen corresponding path program 1 times [2023-11-26 11:48:13,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:13,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252894487] [2023-11-26 11:48:13,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:13,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:13,151 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:48:13,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1498230671] [2023-11-26 11:48:13,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:13,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:13,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:13,152 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:13,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:48:13,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:13,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:48:13,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:13,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 2562 proven. 48 refuted. 0 times theorem prover too weak. 3330 trivial. 0 not checked. [2023-11-26 11:48:13,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:48:13,952 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 114 proven. 48 refuted. 0 times theorem prover too weak. 5778 trivial. 0 not checked. [2023-11-26 11:48:13,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:13,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252894487] [2023-11-26 11:48:13,953 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:48:13,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498230671] [2023-11-26 11:48:13,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498230671] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:48:13,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:48:13,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 11:48:13,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699569392] [2023-11-26 11:48:13,954 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:48:13,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:48:13,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:13,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:48:13,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:48:13,957 INFO L87 Difference]: Start difference. First operand 364 states and 588 transitions. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 2 states have call successors, (71), 2 states have call predecessors, (71), 4 states have return successors, (72), 2 states have call predecessors, (72), 2 states have call successors, (72) [2023-11-26 11:48:14,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:14,350 INFO L93 Difference]: Finished difference Result 578 states and 925 transitions. [2023-11-26 11:48:14,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:48:14,352 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 2 states have call successors, (71), 2 states have call predecessors, (71), 4 states have return successors, (72), 2 states have call predecessors, (72), 2 states have call successors, (72) Word has length 348 [2023-11-26 11:48:14,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:14,355 INFO L225 Difference]: With dead ends: 578 [2023-11-26 11:48:14,355 INFO L226 Difference]: Without dead ends: 215 [2023-11-26 11:48:14,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 698 GetRequests, 688 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:48:14,357 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 155 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:14,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 421 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:48:14,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2023-11-26 11:48:14,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 201. [2023-11-26 11:48:14,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 141 states have (on average 1.4539007092198581) internal successors, (205), 141 states have internal predecessors, (205), 55 states have call successors, (55), 4 states have call predecessors, (55), 4 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2023-11-26 11:48:14,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 315 transitions. [2023-11-26 11:48:14,386 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 315 transitions. Word has length 348 [2023-11-26 11:48:14,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:14,387 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 315 transitions. [2023-11-26 11:48:14,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 2 states have call successors, (71), 2 states have call predecessors, (71), 4 states have return successors, (72), 2 states have call predecessors, (72), 2 states have call successors, (72) [2023-11-26 11:48:14,388 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 315 transitions. [2023-11-26 11:48:14,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2023-11-26 11:48:14,393 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:14,393 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:14,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:14,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:14,610 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:48:14,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:14,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1091283287, now seen corresponding path program 1 times [2023-11-26 11:48:14,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:14,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78598777] [2023-11-26 11:48:14,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:14,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:14,690 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:48:14,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2026064144] [2023-11-26 11:48:14,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:14,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:14,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:14,692 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:14,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:48:15,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:15,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-26 11:48:15,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:15,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 1343 proven. 21 refuted. 0 times theorem prover too weak. 4576 trivial. 0 not checked. [2023-11-26 11:48:15,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:48:16,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 309 proven. 12 refuted. 0 times theorem prover too weak. 5619 trivial. 0 not checked. [2023-11-26 11:48:16,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:16,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78598777] [2023-11-26 11:48:16,304 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:48:16,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026064144] [2023-11-26 11:48:16,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026064144] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:48:16,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:48:16,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2023-11-26 11:48:16,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123040855] [2023-11-26 11:48:16,305 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:48:16,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-26 11:48:16,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:16,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-26 11:48:16,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2023-11-26 11:48:16,308 INFO L87 Difference]: Start difference. First operand 201 states and 315 transitions. Second operand has 19 states, 19 states have (on average 6.2105263157894735) internal successors, (118), 19 states have internal predecessors, (118), 4 states have call successors, (61), 3 states have call predecessors, (61), 8 states have return successors, (62), 6 states have call predecessors, (62), 4 states have call successors, (62) [2023-11-26 11:48:18,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:18,002 INFO L93 Difference]: Finished difference Result 565 states and 852 transitions. [2023-11-26 11:48:18,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-26 11:48:18,003 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.2105263157894735) internal successors, (118), 19 states have internal predecessors, (118), 4 states have call successors, (61), 3 states have call predecessors, (61), 8 states have return successors, (62), 6 states have call predecessors, (62), 4 states have call successors, (62) Word has length 349 [2023-11-26 11:48:18,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:18,007 INFO L225 Difference]: With dead ends: 565 [2023-11-26 11:48:18,007 INFO L226 Difference]: Without dead ends: 365 [2023-11-26 11:48:18,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 723 GetRequests, 681 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=519, Invalid=1373, Unknown=0, NotChecked=0, Total=1892 [2023-11-26 11:48:18,011 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 437 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:18,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [488 Valid, 1094 Invalid, 1257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 1036 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-26 11:48:18,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2023-11-26 11:48:18,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 213. [2023-11-26 11:48:18,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 150 states have (on average 1.4) internal successors, (210), 150 states have internal predecessors, (210), 55 states have call successors, (55), 7 states have call predecessors, (55), 7 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2023-11-26 11:48:18,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 320 transitions. [2023-11-26 11:48:18,060 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 320 transitions. Word has length 349 [2023-11-26 11:48:18,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:18,063 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 320 transitions. [2023-11-26 11:48:18,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.2105263157894735) internal successors, (118), 19 states have internal predecessors, (118), 4 states have call successors, (61), 3 states have call predecessors, (61), 8 states have return successors, (62), 6 states have call predecessors, (62), 4 states have call successors, (62) [2023-11-26 11:48:18,064 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 320 transitions. [2023-11-26 11:48:18,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2023-11-26 11:48:18,069 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:18,070 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:18,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:18,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:18,279 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:48:18,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:18,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1231831897, now seen corresponding path program 1 times [2023-11-26 11:48:18,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:18,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390003211] [2023-11-26 11:48:18,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:18,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:18,349 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:48:18,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [32512516] [2023-11-26 11:48:18,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:18,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:18,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:18,351 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:18,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:48:18,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:18,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 11:48:18,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:20,009 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5940 trivial. 0 not checked. [2023-11-26 11:48:20,009 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:48:20,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:20,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390003211] [2023-11-26 11:48:20,010 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:48:20,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32512516] [2023-11-26 11:48:20,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32512516] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:20,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:20,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:48:20,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228860244] [2023-11-26 11:48:20,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:20,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:48:20,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:20,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:48:20,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:48:20,013 INFO L87 Difference]: Start difference. First operand 213 states and 320 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 1 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 1 states have call successors, (55) [2023-11-26 11:48:20,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:20,398 INFO L93 Difference]: Finished difference Result 600 states and 896 transitions. [2023-11-26 11:48:20,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:48:20,399 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 1 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 1 states have call successors, (55) Word has length 349 [2023-11-26 11:48:20,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:20,404 INFO L225 Difference]: With dead ends: 600 [2023-11-26 11:48:20,404 INFO L226 Difference]: Without dead ends: 388 [2023-11-26 11:48:20,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:48:20,407 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 129 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:20,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 678 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:48:20,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2023-11-26 11:48:20,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 343. [2023-11-26 11:48:20,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 218 states have (on average 1.311926605504587) internal successors, (286), 218 states have internal predecessors, (286), 110 states have call successors, (110), 14 states have call predecessors, (110), 14 states have return successors, (110), 110 states have call predecessors, (110), 110 states have call successors, (110) [2023-11-26 11:48:20,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 506 transitions. [2023-11-26 11:48:20,534 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 506 transitions. Word has length 349 [2023-11-26 11:48:20,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:20,535 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 506 transitions. [2023-11-26 11:48:20,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 1 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 1 states have call successors, (55) [2023-11-26 11:48:20,536 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 506 transitions. [2023-11-26 11:48:20,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2023-11-26 11:48:20,540 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:20,540 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:20,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:20,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:20,749 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:48:20,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:20,749 INFO L85 PathProgramCache]: Analyzing trace with hash -83643737, now seen corresponding path program 1 times [2023-11-26 11:48:20,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:20,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066361842] [2023-11-26 11:48:20,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:20,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:20,815 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:48:20,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [725422652] [2023-11-26 11:48:20,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:20,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:20,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:20,817 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:20,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:48:22,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:22,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-26 11:48:22,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:25,285 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 3284 proven. 444 refuted. 0 times theorem prover too weak. 2212 trivial. 0 not checked. [2023-11-26 11:48:25,286 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:48:27,023 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 162 proven. 315 refuted. 0 times theorem prover too weak. 5463 trivial. 0 not checked. [2023-11-26 11:48:27,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:27,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066361842] [2023-11-26 11:48:27,024 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:48:27,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725422652] [2023-11-26 11:48:27,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725422652] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:48:27,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:48:27,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2023-11-26 11:48:27,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279732962] [2023-11-26 11:48:27,025 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:48:27,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-26 11:48:27,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:27,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-26 11:48:27,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=617, Unknown=0, NotChecked=0, Total=812 [2023-11-26 11:48:27,030 INFO L87 Difference]: Start difference. First operand 343 states and 506 transitions. Second operand has 29 states, 28 states have (on average 5.75) internal successors, (161), 26 states have internal predecessors, (161), 8 states have call successors, (105), 5 states have call predecessors, (105), 10 states have return successors, (106), 8 states have call predecessors, (106), 8 states have call successors, (106) [2023-11-26 11:48:35,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:35,041 INFO L93 Difference]: Finished difference Result 1075 states and 1519 transitions. [2023-11-26 11:48:35,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-11-26 11:48:35,043 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 5.75) internal successors, (161), 26 states have internal predecessors, (161), 8 states have call successors, (105), 5 states have call predecessors, (105), 10 states have return successors, (106), 8 states have call predecessors, (106), 8 states have call successors, (106) Word has length 350 [2023-11-26 11:48:35,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:35,053 INFO L225 Difference]: With dead ends: 1075 [2023-11-26 11:48:35,053 INFO L226 Difference]: Without dead ends: 863 [2023-11-26 11:48:35,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 779 GetRequests, 682 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2708 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2392, Invalid=7310, Unknown=0, NotChecked=0, Total=9702 [2023-11-26 11:48:35,060 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 1211 mSDsluCounter, 1323 mSDsCounter, 0 mSdLazyCounter, 2172 mSolverCounterSat, 509 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1211 SdHoareTripleChecker+Valid, 1615 SdHoareTripleChecker+Invalid, 2681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 509 IncrementalHoareTripleChecker+Valid, 2172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:35,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1211 Valid, 1615 Invalid, 2681 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [509 Valid, 2172 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-11-26 11:48:35,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2023-11-26 11:48:35,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 637. [2023-11-26 11:48:35,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 432 states have (on average 1.3009259259259258) internal successors, (562), 432 states have internal predecessors, (562), 165 states have call successors, (165), 39 states have call predecessors, (165), 39 states have return successors, (165), 165 states have call predecessors, (165), 165 states have call successors, (165) [2023-11-26 11:48:35,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 892 transitions. [2023-11-26 11:48:35,263 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 892 transitions. Word has length 350 [2023-11-26 11:48:35,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:35,264 INFO L495 AbstractCegarLoop]: Abstraction has 637 states and 892 transitions. [2023-11-26 11:48:35,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 5.75) internal successors, (161), 26 states have internal predecessors, (161), 8 states have call successors, (105), 5 states have call predecessors, (105), 10 states have return successors, (106), 8 states have call predecessors, (106), 8 states have call successors, (106) [2023-11-26 11:48:35,265 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 892 transitions. [2023-11-26 11:48:35,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2023-11-26 11:48:35,268 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:35,268 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:35,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:35,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:35,478 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:48:35,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:35,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1094760987, now seen corresponding path program 1 times [2023-11-26 11:48:35,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:35,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622044559] [2023-11-26 11:48:35,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:35,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:35,539 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:48:35,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [706987828] [2023-11-26 11:48:35,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:35,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:35,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:35,541 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:35,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3bde4c6-c432-4186-afcc-1678a1ddb527/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:48:53,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:53,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 100 conjunts are in the unsatisfiable core [2023-11-26 11:48:53,961 INFO L285 TraceCheckSpWp]: Computing forward predicates...