./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-94.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/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_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-94.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/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_0d816db9-44f7-4c36-8c59-316721234136/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 a92ccd1f56cdb28b8e6efc63e50fd814467549956882758cf5aa04b7a8a9eb25 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:57:03,844 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:57:03,965 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:57:03,975 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:57:03,976 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:57:04,018 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:57:04,021 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:57:04,021 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:57:04,022 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:57:04,029 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:57:04,030 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:57:04,031 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:57:04,032 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:57:04,034 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:57:04,034 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:57:04,035 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:57:04,035 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:57:04,036 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:57:04,036 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:57:04,036 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:57:04,037 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:57:04,038 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:57:04,038 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:57:04,038 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:57:04,039 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:57:04,039 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:57:04,040 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:57:04,041 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:57:04,041 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:57:04,041 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:57:04,043 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:57:04,043 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:57:04,043 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:57:04,043 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:57:04,044 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:57:04,044 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:57:04,044 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:57:04,044 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:57:04,045 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:57:04,045 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:57:04,045 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:57:04,046 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:57:04,046 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_0d816db9-44f7-4c36-8c59-316721234136/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a92ccd1f56cdb28b8e6efc63e50fd814467549956882758cf5aa04b7a8a9eb25 [2023-11-26 11:57:04,319 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:57:04,350 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:57:04,353 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:57:04,354 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:57:04,355 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:57:04,357 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-94.i [2023-11-26 11:57:07,545 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:57:07,913 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:57:07,913 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-94.i [2023-11-26 11:57:07,926 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/data/0bdeebd5e/a2103714bdf64932ba2666d702d57159/FLAG2727b12c3 [2023-11-26 11:57:07,942 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/data/0bdeebd5e/a2103714bdf64932ba2666d702d57159 [2023-11-26 11:57:07,945 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:57:07,947 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:57:07,948 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:57:07,949 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:57:07,954 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:57:07,955 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:57:07" (1/1) ... [2023-11-26 11:57:07,956 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3034f6ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:07, skipping insertion in model container [2023-11-26 11:57:07,956 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:57:07" (1/1) ... [2023-11-26 11:57:08,010 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:57:08,161 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_0d816db9-44f7-4c36-8c59-316721234136/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-94.i[916,929] [2023-11-26 11:57:08,341 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:57:08,367 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:57:08,379 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_0d816db9-44f7-4c36-8c59-316721234136/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-94.i[916,929] [2023-11-26 11:57:08,500 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:57:08,527 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:57:08,528 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:08 WrapperNode [2023-11-26 11:57:08,528 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:57:08,529 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:57:08,529 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:57:08,529 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:57:08,538 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:08" (1/1) ... [2023-11-26 11:57:08,559 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:08" (1/1) ... [2023-11-26 11:57:08,730 INFO L138 Inliner]: procedures = 26, calls = 52, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 492 [2023-11-26 11:57:08,731 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:57:08,732 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:57:08,732 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:57:08,732 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:57:08,753 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:08" (1/1) ... [2023-11-26 11:57:08,754 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:08" (1/1) ... [2023-11-26 11:57:08,774 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:08" (1/1) ... [2023-11-26 11:57:08,832 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 11:57:08,832 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:08" (1/1) ... [2023-11-26 11:57:08,832 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:08" (1/1) ... [2023-11-26 11:57:08,867 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:08" (1/1) ... [2023-11-26 11:57:08,881 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:08" (1/1) ... [2023-11-26 11:57:08,901 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:08" (1/1) ... [2023-11-26 11:57:08,906 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:08" (1/1) ... [2023-11-26 11:57:08,920 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:57:08,922 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:57:08,922 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:57:08,922 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:57:08,923 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:08" (1/1) ... [2023-11-26 11:57:08,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:57:08,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:08,959 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:57:08,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:57:09,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:57:09,005 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 11:57:09,006 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 11:57:09,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:57:09,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:57:09,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:57:09,189 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:57:09,192 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:57:10,271 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:57:10,315 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:57:10,315 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:57:10,316 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:57:10 BoogieIcfgContainer [2023-11-26 11:57:10,316 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:57:10,319 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:57:10,319 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:57:10,323 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:57:10,324 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:57:07" (1/3) ... [2023-11-26 11:57:10,325 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11b8e0f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:57:10, skipping insertion in model container [2023-11-26 11:57:10,325 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:08" (2/3) ... [2023-11-26 11:57:10,326 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11b8e0f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:57:10, skipping insertion in model container [2023-11-26 11:57:10,326 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:57:10" (3/3) ... [2023-11-26 11:57:10,327 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-94.i [2023-11-26 11:57:10,350 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:57:10,350 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:57:10,413 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:57:10,421 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;@34a7e516, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:57:10,421 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:57:10,427 INFO L276 IsEmpty]: Start isEmpty. Operand has 172 states, 130 states have (on average 1.5923076923076922) internal successors, (207), 131 states have internal predecessors, (207), 39 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2023-11-26 11:57:10,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2023-11-26 11:57:10,449 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:10,450 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:57:10,450 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:10,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:10,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1868492597, now seen corresponding path program 1 times [2023-11-26 11:57:10,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:10,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578501795] [2023-11-26 11:57:10,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:10,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:10,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:10,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:10,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578501795] [2023-11-26 11:57:10,866 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 11:57:10,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017252773] [2023-11-26 11:57:10,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:10,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:10,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:10,874 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:10,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:57:11,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:11,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 11:57:11,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:11,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 2888 trivial. 0 not checked. [2023-11-26 11:57:11,345 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:57:11,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017252773] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:11,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:11,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:57:11,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137639106] [2023-11-26 11:57:11,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:11,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:57:11,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:11,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:57:11,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:57:11,417 INFO L87 Difference]: Start difference. First operand has 172 states, 130 states have (on average 1.5923076923076922) internal successors, (207), 131 states have internal predecessors, (207), 39 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) Second operand has 2 states, 2 states have (on average 40.5) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 2 states have call successors, (39) [2023-11-26 11:57:11,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:11,491 INFO L93 Difference]: Finished difference Result 341 states and 607 transitions. [2023-11-26 11:57:11,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:57:11,495 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 40.5) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 2 states have call successors, (39) Word has length 271 [2023-11-26 11:57:11,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:11,507 INFO L225 Difference]: With dead ends: 341 [2023-11-26 11:57:11,508 INFO L226 Difference]: Without dead ends: 170 [2023-11-26 11:57:11,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 270 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 11:57:11,525 INFO L413 NwaCegarLoop]: 277 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, 277 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 11:57:11,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 277 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:57:11,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-11-26 11:57:11,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2023-11-26 11:57:11,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 129 states have (on average 1.565891472868217) internal successors, (202), 129 states have internal predecessors, (202), 39 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2023-11-26 11:57:11,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 280 transitions. [2023-11-26 11:57:11,634 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 280 transitions. Word has length 271 [2023-11-26 11:57:11,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:11,639 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 280 transitions. [2023-11-26 11:57:11,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 40.5) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 2 states have call successors, (39) [2023-11-26 11:57:11,640 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 280 transitions. [2023-11-26 11:57:11,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2023-11-26 11:57:11,656 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:11,657 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:57:11,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 11:57:11,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:11,868 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:11,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:11,869 INFO L85 PathProgramCache]: Analyzing trace with hash -301388455, now seen corresponding path program 1 times [2023-11-26 11:57:11,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:11,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010539169] [2023-11-26 11:57:11,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:11,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:12,043 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:57:12,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1852315970] [2023-11-26 11:57:12,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:12,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:12,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:12,052 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:12,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:57:12,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:12,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:57:12,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:13,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2023-11-26 11:57:13,094 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:57:13,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:13,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010539169] [2023-11-26 11:57:13,095 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:57:13,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852315970] [2023-11-26 11:57:13,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852315970] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:13,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:13,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 11:57:13,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794460063] [2023-11-26 11:57:13,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:13,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:57:13,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:13,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:57:13,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:57:13,100 INFO L87 Difference]: Start difference. First operand 170 states and 280 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-11-26 11:57:14,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:14,702 INFO L93 Difference]: Finished difference Result 832 states and 1375 transitions. [2023-11-26 11:57:14,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 11:57:14,704 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) Word has length 271 [2023-11-26 11:57:14,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:14,718 INFO L225 Difference]: With dead ends: 832 [2023-11-26 11:57:14,718 INFO L226 Difference]: Without dead ends: 663 [2023-11-26 11:57:14,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-11-26 11:57:14,723 INFO L413 NwaCegarLoop]: 602 mSDtfsCounter, 641 mSDsluCounter, 1779 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 2381 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:14,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [641 Valid, 2381 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-26 11:57:14,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2023-11-26 11:57:14,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 410. [2023-11-26 11:57:14,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 329 states have (on average 1.5927051671732524) internal successors, (524), 329 states have internal predecessors, (524), 78 states have call successors, (78), 2 states have call predecessors, (78), 2 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2023-11-26 11:57:14,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 680 transitions. [2023-11-26 11:57:14,843 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 680 transitions. Word has length 271 [2023-11-26 11:57:14,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:14,847 INFO L495 AbstractCegarLoop]: Abstraction has 410 states and 680 transitions. [2023-11-26 11:57:14,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-11-26 11:57:14,848 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 680 transitions. [2023-11-26 11:57:14,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2023-11-26 11:57:14,855 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:14,856 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:57:14,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:15,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:15,064 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:15,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:15,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1687591849, now seen corresponding path program 1 times [2023-11-26 11:57:15,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:15,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789160270] [2023-11-26 11:57:15,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:15,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:15,164 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:57:15,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [263307928] [2023-11-26 11:57:15,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:15,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:15,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:15,171 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:15,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:57:15,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:15,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:57:15,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:15,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2023-11-26 11:57:15,984 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:57:15,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:15,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789160270] [2023-11-26 11:57:15,984 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:57:15,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263307928] [2023-11-26 11:57:15,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263307928] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:15,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:15,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 11:57:15,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512246565] [2023-11-26 11:57:15,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:15,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:57:15,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:15,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:57:15,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:57:15,990 INFO L87 Difference]: Start difference. First operand 410 states and 680 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-11-26 11:57:17,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:17,318 INFO L93 Difference]: Finished difference Result 1085 states and 1792 transitions. [2023-11-26 11:57:17,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 11:57:17,321 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) Word has length 271 [2023-11-26 11:57:17,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:17,327 INFO L225 Difference]: With dead ends: 1085 [2023-11-26 11:57:17,328 INFO L226 Difference]: Without dead ends: 676 [2023-11-26 11:57:17,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-11-26 11:57:17,330 INFO L413 NwaCegarLoop]: 439 mSDtfsCounter, 820 mSDsluCounter, 1463 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 1902 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:17,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [820 Valid, 1902 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-26 11:57:17,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2023-11-26 11:57:17,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 408. [2023-11-26 11:57:17,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 327 states have (on average 1.5932721712538227) internal successors, (521), 327 states have internal predecessors, (521), 78 states have call successors, (78), 2 states have call predecessors, (78), 2 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2023-11-26 11:57:17,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 677 transitions. [2023-11-26 11:57:17,383 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 677 transitions. Word has length 271 [2023-11-26 11:57:17,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:17,384 INFO L495 AbstractCegarLoop]: Abstraction has 408 states and 677 transitions. [2023-11-26 11:57:17,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-11-26 11:57:17,385 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 677 transitions. [2023-11-26 11:57:17,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2023-11-26 11:57:17,390 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:17,390 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:57:17,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:17,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:17,598 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:17,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:17,599 INFO L85 PathProgramCache]: Analyzing trace with hash 988854075, now seen corresponding path program 1 times [2023-11-26 11:57:17,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:17,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536313733] [2023-11-26 11:57:17,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:17,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:17,704 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:57:17,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1538310831] [2023-11-26 11:57:17,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:17,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:17,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:17,715 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:17,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:57:17,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:17,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:57:17,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:18,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2023-11-26 11:57:18,065 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:57:18,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:18,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536313733] [2023-11-26 11:57:18,066 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:57:18,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538310831] [2023-11-26 11:57:18,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538310831] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:18,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:18,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:57:18,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179361692] [2023-11-26 11:57:18,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:18,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:57:18,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:18,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:57:18,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:57:18,070 INFO L87 Difference]: Start difference. First operand 408 states and 677 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-11-26 11:57:18,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:18,362 INFO L93 Difference]: Finished difference Result 1136 states and 1887 transitions. [2023-11-26 11:57:18,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:57:18,363 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) Word has length 272 [2023-11-26 11:57:18,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:18,370 INFO L225 Difference]: With dead ends: 1136 [2023-11-26 11:57:18,370 INFO L226 Difference]: Without dead ends: 729 [2023-11-26 11:57:18,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 269 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 11:57:18,374 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 408 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:18,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 585 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:57:18,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2023-11-26 11:57:18,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 725. [2023-11-26 11:57:18,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 606 states have (on average 1.608910891089109) internal successors, (975), 608 states have internal predecessors, (975), 114 states have call successors, (114), 4 states have call predecessors, (114), 4 states have return successors, (114), 112 states have call predecessors, (114), 114 states have call successors, (114) [2023-11-26 11:57:18,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1203 transitions. [2023-11-26 11:57:18,483 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1203 transitions. Word has length 272 [2023-11-26 11:57:18,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:18,484 INFO L495 AbstractCegarLoop]: Abstraction has 725 states and 1203 transitions. [2023-11-26 11:57:18,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-11-26 11:57:18,485 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1203 transitions. [2023-11-26 11:57:18,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2023-11-26 11:57:18,490 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:18,490 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:57:18,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:18,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:18,698 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:18,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:18,699 INFO L85 PathProgramCache]: Analyzing trace with hash -651580507, now seen corresponding path program 1 times [2023-11-26 11:57:18,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:18,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430928958] [2023-11-26 11:57:18,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:18,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:18,775 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:57:18,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1175909635] [2023-11-26 11:57:18,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:18,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:18,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:18,777 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:18,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:57:19,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:19,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:57:19,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:19,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2023-11-26 11:57:19,095 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:57:19,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:19,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430928958] [2023-11-26 11:57:19,097 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:57:19,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175909635] [2023-11-26 11:57:19,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175909635] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:19,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:19,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:57:19,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771016455] [2023-11-26 11:57:19,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:19,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:57:19,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:19,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:57:19,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:57:19,105 INFO L87 Difference]: Start difference. First operand 725 states and 1203 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-11-26 11:57:19,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:19,268 INFO L93 Difference]: Finished difference Result 2111 states and 3507 transitions. [2023-11-26 11:57:19,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:57:19,269 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) Word has length 272 [2023-11-26 11:57:19,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:19,284 INFO L225 Difference]: With dead ends: 2111 [2023-11-26 11:57:19,285 INFO L226 Difference]: Without dead ends: 1387 [2023-11-26 11:57:19,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 269 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 11:57:19,288 INFO L413 NwaCegarLoop]: 405 mSDtfsCounter, 331 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:19,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 989 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:57:19,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2023-11-26 11:57:19,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 737. [2023-11-26 11:57:19,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 618 states have (on average 1.5970873786407767) internal successors, (987), 620 states have internal predecessors, (987), 114 states have call successors, (114), 4 states have call predecessors, (114), 4 states have return successors, (114), 112 states have call predecessors, (114), 114 states have call successors, (114) [2023-11-26 11:57:19,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1215 transitions. [2023-11-26 11:57:19,393 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1215 transitions. Word has length 272 [2023-11-26 11:57:19,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:19,394 INFO L495 AbstractCegarLoop]: Abstraction has 737 states and 1215 transitions. [2023-11-26 11:57:19,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-11-26 11:57:19,395 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1215 transitions. [2023-11-26 11:57:19,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2023-11-26 11:57:19,402 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:19,402 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:57:19,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:19,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:19,610 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:19,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:19,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1045947293, now seen corresponding path program 1 times [2023-11-26 11:57:19,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:19,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872976936] [2023-11-26 11:57:19,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:19,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:19,676 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:57:19,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [487943495] [2023-11-26 11:57:19,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:19,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:19,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:19,678 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:19,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:57:19,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:19,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 11:57:19,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:20,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2023-11-26 11:57:20,508 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:57:20,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:20,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872976936] [2023-11-26 11:57:20,509 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:57:20,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487943495] [2023-11-26 11:57:20,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487943495] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:20,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:20,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-26 11:57:20,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775392771] [2023-11-26 11:57:20,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:20,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 11:57:20,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:20,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 11:57:20,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:57:20,513 INFO L87 Difference]: Start difference. First operand 737 states and 1215 transitions. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 10 states have internal predecessors, (80), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-11-26 11:57:21,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:21,793 INFO L93 Difference]: Finished difference Result 3903 states and 6479 transitions. [2023-11-26 11:57:21,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-26 11:57:21,794 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 10 states have internal predecessors, (80), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) Word has length 272 [2023-11-26 11:57:21,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:21,817 INFO L225 Difference]: With dead ends: 3903 [2023-11-26 11:57:21,818 INFO L226 Difference]: Without dead ends: 3605 [2023-11-26 11:57:21,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=242, Invalid=570, Unknown=0, NotChecked=0, Total=812 [2023-11-26 11:57:21,823 INFO L413 NwaCegarLoop]: 378 mSDtfsCounter, 2613 mSDsluCounter, 2432 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2613 SdHoareTripleChecker+Valid, 2810 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:21,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2613 Valid, 2810 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 11:57:21,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3605 states. [2023-11-26 11:57:22,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3605 to 2163. [2023-11-26 11:57:22,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 1817 states have (on average 1.5987892129884425) internal successors, (2905), 1825 states have internal predecessors, (2905), 331 states have call successors, (331), 14 states have call predecessors, (331), 14 states have return successors, (331), 323 states have call predecessors, (331), 331 states have call successors, (331) [2023-11-26 11:57:22,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 3567 transitions. [2023-11-26 11:57:22,142 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 3567 transitions. Word has length 272 [2023-11-26 11:57:22,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:22,143 INFO L495 AbstractCegarLoop]: Abstraction has 2163 states and 3567 transitions. [2023-11-26 11:57:22,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 10 states have internal predecessors, (80), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-11-26 11:57:22,143 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 3567 transitions. [2023-11-26 11:57:22,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2023-11-26 11:57:22,152 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:22,152 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:57:22,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:22,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 11:57:22,360 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:22,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:22,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1179960799, now seen corresponding path program 1 times [2023-11-26 11:57:22,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:22,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303946567] [2023-11-26 11:57:22,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:22,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:22,411 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:57:22,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [486640865] [2023-11-26 11:57:22,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:22,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:22,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:22,413 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:22,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:57:22,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:22,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:57:22,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:22,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2023-11-26 11:57:22,782 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:57:22,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:22,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303946567] [2023-11-26 11:57:22,783 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:57:22,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486640865] [2023-11-26 11:57:22,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486640865] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:22,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:22,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:57:22,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858149154] [2023-11-26 11:57:22,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:22,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:57:22,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:22,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:57:22,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:57:22,787 INFO L87 Difference]: Start difference. First operand 2163 states and 3567 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-11-26 11:57:23,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:23,351 INFO L93 Difference]: Finished difference Result 4273 states and 7036 transitions. [2023-11-26 11:57:23,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:57:23,351 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) Word has length 272 [2023-11-26 11:57:23,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:23,367 INFO L225 Difference]: With dead ends: 4273 [2023-11-26 11:57:23,367 INFO L226 Difference]: Without dead ends: 2201 [2023-11-26 11:57:23,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:57:23,373 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 426 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 1148 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:23,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 1148 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:57:23,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2201 states. [2023-11-26 11:57:23,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2201 to 2199. [2023-11-26 11:57:23,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2199 states, 1847 states have (on average 1.589063345966432) internal successors, (2935), 1855 states have internal predecessors, (2935), 331 states have call successors, (331), 20 states have call predecessors, (331), 20 states have return successors, (331), 323 states have call predecessors, (331), 331 states have call successors, (331) [2023-11-26 11:57:23,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2199 states to 2199 states and 3597 transitions. [2023-11-26 11:57:23,607 INFO L78 Accepts]: Start accepts. Automaton has 2199 states and 3597 transitions. Word has length 272 [2023-11-26 11:57:23,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:23,608 INFO L495 AbstractCegarLoop]: Abstraction has 2199 states and 3597 transitions. [2023-11-26 11:57:23,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-11-26 11:57:23,609 INFO L276 IsEmpty]: Start isEmpty. Operand 2199 states and 3597 transitions. [2023-11-26 11:57:23,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2023-11-26 11:57:23,615 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:23,616 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:57:23,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:23,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:23,823 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:23,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:23,824 INFO L85 PathProgramCache]: Analyzing trace with hash -552244438, now seen corresponding path program 1 times [2023-11-26 11:57:23,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:23,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59752201] [2023-11-26 11:57:23,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:23,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:23,875 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:57:23,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1937479712] [2023-11-26 11:57:23,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:23,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:23,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:23,882 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:23,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:57:24,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:24,179 INFO L262 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:57:24,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:24,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1478 proven. 66 refuted. 0 times theorem prover too weak. 1420 trivial. 0 not checked. [2023-11-26 11:57:24,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:24,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 48 proven. 66 refuted. 0 times theorem prover too weak. 2850 trivial. 0 not checked. [2023-11-26 11:57:24,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:24,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59752201] [2023-11-26 11:57:24,749 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:57:24,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937479712] [2023-11-26 11:57:24,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937479712] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:57:24,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:57:24,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-26 11:57:24,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632547552] [2023-11-26 11:57:24,750 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:24,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:57:24,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:24,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:57:24,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:57:24,754 INFO L87 Difference]: Start difference. First operand 2199 states and 3597 transitions. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 3 states have call successors, (61), 2 states have call predecessors, (61), 4 states have return successors, (62), 3 states have call predecessors, (62), 3 states have call successors, (62) [2023-11-26 11:57:25,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:25,530 INFO L93 Difference]: Finished difference Result 3757 states and 6099 transitions. [2023-11-26 11:57:25,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:57:25,532 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 3 states have call successors, (61), 2 states have call predecessors, (61), 4 states have return successors, (62), 3 states have call predecessors, (62), 3 states have call successors, (62) Word has length 273 [2023-11-26 11:57:25,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:25,556 INFO L225 Difference]: With dead ends: 3757 [2023-11-26 11:57:25,556 INFO L226 Difference]: Without dead ends: 1649 [2023-11-26 11:57:25,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 548 GetRequests, 536 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:57:25,564 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 503 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:25,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 658 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 11:57:25,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2023-11-26 11:57:25,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 839. [2023-11-26 11:57:25,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 672 states have (on average 1.5431547619047619) internal successors, (1037), 675 states have internal predecessors, (1037), 153 states have call successors, (153), 13 states have call predecessors, (153), 13 states have return successors, (153), 150 states have call predecessors, (153), 153 states have call successors, (153) [2023-11-26 11:57:25,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 1343 transitions. [2023-11-26 11:57:25,768 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 1343 transitions. Word has length 273 [2023-11-26 11:57:25,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:25,770 INFO L495 AbstractCegarLoop]: Abstraction has 839 states and 1343 transitions. [2023-11-26 11:57:25,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 3 states have call successors, (61), 2 states have call predecessors, (61), 4 states have return successors, (62), 3 states have call predecessors, (62), 3 states have call successors, (62) [2023-11-26 11:57:25,770 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 1343 transitions. [2023-11-26 11:57:25,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2023-11-26 11:57:25,776 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:25,777 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:57:25,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:25,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:25,985 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:25,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:25,986 INFO L85 PathProgramCache]: Analyzing trace with hash -2064600346, now seen corresponding path program 1 times [2023-11-26 11:57:25,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:25,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435502955] [2023-11-26 11:57:25,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:25,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:26,053 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:57:26,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1093001304] [2023-11-26 11:57:26,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:26,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:26,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:26,057 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:26,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:57:26,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:26,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:57:26,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:26,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 398 proven. 6 refuted. 0 times theorem prover too weak. 2560 trivial. 0 not checked. [2023-11-26 11:57:26,480 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:26,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 108 proven. 6 refuted. 0 times theorem prover too weak. 2850 trivial. 0 not checked. [2023-11-26 11:57:26,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:26,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435502955] [2023-11-26 11:57:26,710 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:57:26,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093001304] [2023-11-26 11:57:26,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093001304] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:57:26,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:57:26,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 11:57:26,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147758271] [2023-11-26 11:57:26,711 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:26,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:57:26,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:26,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:57:26,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:57:26,714 INFO L87 Difference]: Start difference. First operand 839 states and 1343 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 2 states have call successors, (41), 2 states have call predecessors, (41), 4 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2023-11-26 11:57:27,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:27,119 INFO L93 Difference]: Finished difference Result 1637 states and 2606 transitions. [2023-11-26 11:57:27,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:57:27,121 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 2 states have call successors, (41), 2 states have call predecessors, (41), 4 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) Word has length 273 [2023-11-26 11:57:27,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:27,128 INFO L225 Difference]: With dead ends: 1637 [2023-11-26 11:57:27,128 INFO L226 Difference]: Without dead ends: 873 [2023-11-26 11:57:27,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 548 GetRequests, 538 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 11:57:27,133 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 399 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:27,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 615 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:57:27,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2023-11-26 11:57:27,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 851. [2023-11-26 11:57:27,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 681 states have (on average 1.5301027900146842) internal successors, (1042), 684 states have internal predecessors, (1042), 153 states have call successors, (153), 16 states have call predecessors, (153), 16 states have return successors, (153), 150 states have call predecessors, (153), 153 states have call successors, (153) [2023-11-26 11:57:27,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1348 transitions. [2023-11-26 11:57:27,300 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1348 transitions. Word has length 273 [2023-11-26 11:57:27,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:27,301 INFO L495 AbstractCegarLoop]: Abstraction has 851 states and 1348 transitions. [2023-11-26 11:57:27,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 2 states have call successors, (41), 2 states have call predecessors, (41), 4 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2023-11-26 11:57:27,302 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1348 transitions. [2023-11-26 11:57:27,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2023-11-26 11:57:27,306 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:27,307 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:57:27,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:27,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:27,521 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:27,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:27,521 INFO L85 PathProgramCache]: Analyzing trace with hash 384999784, now seen corresponding path program 1 times [2023-11-26 11:57:27,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:27,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662795331] [2023-11-26 11:57:27,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:27,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:27,586 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:57:27,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2128187095] [2023-11-26 11:57:27,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:27,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:27,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:27,588 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:27,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:57:27,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:27,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-26 11:57:27,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:29,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2023-11-26 11:57:29,488 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:57:29,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:29,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662795331] [2023-11-26 11:57:29,489 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:57:29,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128187095] [2023-11-26 11:57:29,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128187095] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:29,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:29,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:57:29,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637714053] [2023-11-26 11:57:29,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:29,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:57:29,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:29,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:57:29,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:57:29,494 INFO L87 Difference]: Start difference. First operand 851 states and 1348 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 5 states have internal predecessors, (81), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-11-26 11:57:30,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:30,072 INFO L93 Difference]: Finished difference Result 2093 states and 3364 transitions. [2023-11-26 11:57:30,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:57:30,073 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 5 states have internal predecessors, (81), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) Word has length 273 [2023-11-26 11:57:30,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:30,084 INFO L225 Difference]: With dead ends: 2093 [2023-11-26 11:57:30,085 INFO L226 Difference]: Without dead ends: 1321 [2023-11-26 11:57:30,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:57:30,088 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 495 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 1208 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:30,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 1208 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:57:30,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2023-11-26 11:57:30,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 865. [2023-11-26 11:57:30,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 695 states have (on average 1.5294964028776978) internal successors, (1063), 697 states have internal predecessors, (1063), 153 states have call successors, (153), 16 states have call predecessors, (153), 16 states have return successors, (153), 151 states have call predecessors, (153), 153 states have call successors, (153) [2023-11-26 11:57:30,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 1369 transitions. [2023-11-26 11:57:30,230 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 1369 transitions. Word has length 273 [2023-11-26 11:57:30,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:30,231 INFO L495 AbstractCegarLoop]: Abstraction has 865 states and 1369 transitions. [2023-11-26 11:57:30,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 5 states have internal predecessors, (81), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-11-26 11:57:30,232 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 1369 transitions. [2023-11-26 11:57:30,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2023-11-26 11:57:30,235 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:30,235 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:57:30,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:30,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 11:57:30,443 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:30,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:30,444 INFO L85 PathProgramCache]: Analyzing trace with hash 31911402, now seen corresponding path program 1 times [2023-11-26 11:57:30,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:30,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375784443] [2023-11-26 11:57:30,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:30,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:30,490 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:57:30,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1397883199] [2023-11-26 11:57:30,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:30,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:30,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:30,492 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:30,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 11:57:30,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:30,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 11:57:30,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:32,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1400 proven. 78 refuted. 0 times theorem prover too weak. 1486 trivial. 0 not checked. [2023-11-26 11:57:32,423 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:33,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 36 proven. 78 refuted. 0 times theorem prover too weak. 2850 trivial. 0 not checked. [2023-11-26 11:57:33,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:33,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375784443] [2023-11-26 11:57:33,655 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:57:33,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397883199] [2023-11-26 11:57:33,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397883199] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:57:33,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:57:33,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2023-11-26 11:57:33,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285642532] [2023-11-26 11:57:33,657 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:33,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-26 11:57:33,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:33,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-26 11:57:33,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2023-11-26 11:57:33,661 INFO L87 Difference]: Start difference. First operand 865 states and 1369 transitions. Second operand has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 24 states have internal predecessors, (152), 6 states have call successors, (78), 4 states have call predecessors, (78), 6 states have return successors, (78), 6 states have call predecessors, (78), 6 states have call successors, (78) [2023-11-26 11:57:45,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:45,047 INFO L93 Difference]: Finished difference Result 7120 states and 11242 transitions. [2023-11-26 11:57:45,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2023-11-26 11:57:45,048 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 24 states have internal predecessors, (152), 6 states have call successors, (78), 4 states have call predecessors, (78), 6 states have return successors, (78), 6 states have call predecessors, (78), 6 states have call successors, (78) Word has length 273 [2023-11-26 11:57:45,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:45,088 INFO L225 Difference]: With dead ends: 7120 [2023-11-26 11:57:45,089 INFO L226 Difference]: Without dead ends: 6348 [2023-11-26 11:57:45,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 674 GetRequests, 547 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6635 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3347, Invalid=13165, Unknown=0, NotChecked=0, Total=16512 [2023-11-26 11:57:45,101 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 7927 mSDsluCounter, 4099 mSDsCounter, 0 mSdLazyCounter, 4887 mSolverCounterSat, 1636 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7941 SdHoareTripleChecker+Valid, 4391 SdHoareTripleChecker+Invalid, 6523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1636 IncrementalHoareTripleChecker+Valid, 4887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:45,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7941 Valid, 4391 Invalid, 6523 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1636 Valid, 4887 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2023-11-26 11:57:45,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6348 states. [2023-11-26 11:57:45,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6348 to 4339. [2023-11-26 11:57:45,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4339 states, 3773 states have (on average 1.5809700503578055) internal successors, (5965), 3787 states have internal predecessors, (5965), 498 states have call successors, (498), 67 states have call predecessors, (498), 67 states have return successors, (498), 484 states have call predecessors, (498), 498 states have call successors, (498) [2023-11-26 11:57:45,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4339 states to 4339 states and 6961 transitions. [2023-11-26 11:57:45,624 INFO L78 Accepts]: Start accepts. Automaton has 4339 states and 6961 transitions. Word has length 273 [2023-11-26 11:57:45,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:45,625 INFO L495 AbstractCegarLoop]: Abstraction has 4339 states and 6961 transitions. [2023-11-26 11:57:45,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 24 states have internal predecessors, (152), 6 states have call successors, (78), 4 states have call predecessors, (78), 6 states have return successors, (78), 6 states have call predecessors, (78), 6 states have call successors, (78) [2023-11-26 11:57:45,625 INFO L276 IsEmpty]: Start isEmpty. Operand 4339 states and 6961 transitions. [2023-11-26 11:57:45,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2023-11-26 11:57:45,629 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:45,629 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:57:45,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:45,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:45,837 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:45,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:45,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1773526932, now seen corresponding path program 1 times [2023-11-26 11:57:45,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:45,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133043463] [2023-11-26 11:57:45,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:45,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:45,901 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:57:45,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [399900421] [2023-11-26 11:57:45,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:45,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:45,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:45,903 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:45,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 11:57:46,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:46,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:57:46,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:46,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1730 proven. 78 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2023-11-26 11:57:46,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:47,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 36 proven. 78 refuted. 0 times theorem prover too weak. 2850 trivial. 0 not checked. [2023-11-26 11:57:47,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:47,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133043463] [2023-11-26 11:57:47,076 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:57:47,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399900421] [2023-11-26 11:57:47,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399900421] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:57:47,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:57:47,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-26 11:57:47,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198239467] [2023-11-26 11:57:47,077 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:47,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 11:57:47,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:47,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 11:57:47,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:57:47,080 INFO L87 Difference]: Start difference. First operand 4339 states and 6961 transitions. Second operand has 12 states, 12 states have (on average 9.5) internal successors, (114), 12 states have internal predecessors, (114), 5 states have call successors, (65), 3 states have call predecessors, (65), 5 states have return successors, (66), 5 states have call predecessors, (66), 5 states have call successors, (66) [2023-11-26 11:57:47,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:47,819 INFO L93 Difference]: Finished difference Result 5916 states and 9480 transitions. [2023-11-26 11:57:47,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 11:57:47,820 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 9.5) internal successors, (114), 12 states have internal predecessors, (114), 5 states have call successors, (65), 3 states have call predecessors, (65), 5 states have return successors, (66), 5 states have call predecessors, (66), 5 states have call successors, (66) Word has length 273 [2023-11-26 11:57:47,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:47,831 INFO L225 Difference]: With dead ends: 5916 [2023-11-26 11:57:47,832 INFO L226 Difference]: Without dead ends: 1678 [2023-11-26 11:57:47,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 534 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2023-11-26 11:57:47,841 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 768 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:47,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [780 Valid, 555 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 11:57:47,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1678 states. [2023-11-26 11:57:48,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1678 to 1638. [2023-11-26 11:57:48,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1372 states have (on average 1.564139941690962) internal successors, (2146), 1376 states have internal predecessors, (2146), 235 states have call successors, (235), 30 states have call predecessors, (235), 30 states have return successors, (235), 231 states have call predecessors, (235), 235 states have call successors, (235) [2023-11-26 11:57:48,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 2616 transitions. [2023-11-26 11:57:48,040 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 2616 transitions. Word has length 273 [2023-11-26 11:57:48,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:48,041 INFO L495 AbstractCegarLoop]: Abstraction has 1638 states and 2616 transitions. [2023-11-26 11:57:48,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.5) internal successors, (114), 12 states have internal predecessors, (114), 5 states have call successors, (65), 3 states have call predecessors, (65), 5 states have return successors, (66), 5 states have call predecessors, (66), 5 states have call successors, (66) [2023-11-26 11:57:48,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 2616 transitions. [2023-11-26 11:57:48,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2023-11-26 11:57:48,044 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:48,044 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:57:48,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:48,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-26 11:57:48,252 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:48,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:48,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1240135188, now seen corresponding path program 1 times [2023-11-26 11:57:48,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:48,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328876973] [2023-11-26 11:57:48,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:48,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:48,296 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:57:48,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1706919121] [2023-11-26 11:57:48,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:48,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:48,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:48,298 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:48,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-26 11:57:48,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:48,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:57:48,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:48,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2023-11-26 11:57:48,980 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:57:48,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:48,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328876973] [2023-11-26 11:57:48,980 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:57:48,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706919121] [2023-11-26 11:57:48,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706919121] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:48,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:48,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:57:48,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596324740] [2023-11-26 11:57:48,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:48,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:57:48,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:48,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:57:48,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:57:48,984 INFO L87 Difference]: Start difference. First operand 1638 states and 2616 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-11-26 11:57:49,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:49,663 INFO L93 Difference]: Finished difference Result 6495 states and 10437 transitions. [2023-11-26 11:57:49,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:57:49,664 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) Word has length 273 [2023-11-26 11:57:49,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:49,694 INFO L225 Difference]: With dead ends: 6495 [2023-11-26 11:57:49,694 INFO L226 Difference]: Without dead ends: 4962 [2023-11-26 11:57:49,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:57:49,700 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 833 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 833 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:49,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [833 Valid, 1215 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:57:49,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4962 states. [2023-11-26 11:57:50,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4962 to 3483. [2023-11-26 11:57:50,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3483 states, 2989 states have (on average 1.5690866510538641) internal successors, (4690), 2997 states have internal predecessors, (4690), 435 states have call successors, (435), 58 states have call predecessors, (435), 58 states have return successors, (435), 427 states have call predecessors, (435), 435 states have call successors, (435) [2023-11-26 11:57:50,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3483 states to 3483 states and 5560 transitions. [2023-11-26 11:57:50,102 INFO L78 Accepts]: Start accepts. Automaton has 3483 states and 5560 transitions. Word has length 273 [2023-11-26 11:57:50,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:50,103 INFO L495 AbstractCegarLoop]: Abstraction has 3483 states and 5560 transitions. [2023-11-26 11:57:50,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-11-26 11:57:50,103 INFO L276 IsEmpty]: Start isEmpty. Operand 3483 states and 5560 transitions. [2023-11-26 11:57:50,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2023-11-26 11:57:50,108 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:50,108 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:57:50,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:50,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-26 11:57:50,317 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:50,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:50,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1414397526, now seen corresponding path program 1 times [2023-11-26 11:57:50,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:50,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130636656] [2023-11-26 11:57:50,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:50,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:50,367 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:57:50,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2127881620] [2023-11-26 11:57:50,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:50,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:50,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:50,369 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:50,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d816db9-44f7-4c36-8c59-316721234136/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-26 11:57:50,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:50,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-26 11:57:50,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:51,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1679 proven. 57 refuted. 0 times theorem prover too weak. 1228 trivial. 0 not checked. [2023-11-26 11:57:51,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:52,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 165 proven. 60 refuted. 0 times theorem prover too weak. 2739 trivial. 0 not checked. [2023-11-26 11:57:52,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:52,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130636656] [2023-11-26 11:57:52,184 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:57:52,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127881620] [2023-11-26 11:57:52,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127881620] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:57:52,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:57:52,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2023-11-26 11:57:52,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564449418] [2023-11-26 11:57:52,185 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:52,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-26 11:57:52,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:52,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-26 11:57:52,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2023-11-26 11:57:52,189 INFO L87 Difference]: Start difference. First operand 3483 states and 5560 transitions. Second operand has 23 states, 23 states have (on average 6.391304347826087) internal successors, (147), 23 states have internal predecessors, (147), 6 states have call successors, (78), 4 states have call predecessors, (78), 8 states have return successors, (78), 6 states have call predecessors, (78), 6 states have call successors, (78)