./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_9e9d9658-14a4-48b6-a7df-bfc580643080/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9d9658-14a4-48b6-a7df-bfc580643080/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9d9658-14a4-48b6-a7df-bfc580643080/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9d9658-14a4-48b6-a7df-bfc580643080/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9d9658-14a4-48b6-a7df-bfc580643080/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9d9658-14a4-48b6-a7df-bfc580643080/bin/uautomizer-verify-uTZkv6EMXl --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 21bdbc3e0ac2e83aebdf4ed5d685b5451eeeab46fc8ce4a523557df5ff3c8a1c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:34:01,651 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:34:01,724 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9d9658-14a4-48b6-a7df-bfc580643080/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:34:01,729 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:34:01,730 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:34:01,765 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:34:01,769 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:34:01,769 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:34:01,771 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:34:01,776 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:34:01,777 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:34:01,777 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:34:01,777 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:34:01,779 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:34:01,780 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:34:01,780 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:34:01,780 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:34:01,781 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:34:01,781 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:34:01,782 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:34:01,782 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:34:01,783 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:34:01,783 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:34:01,785 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:34:01,785 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:34:01,786 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:34:01,787 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:34:01,787 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:34:01,787 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:34:01,788 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:34:01,789 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:34:01,789 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:34:01,790 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:34:01,790 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:34:01,790 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:34:01,790 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:34:01,791 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:34:01,791 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:34:01,791 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:34:01,791 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_9e9d9658-14a4-48b6-a7df-bfc580643080/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9d9658-14a4-48b6-a7df-bfc580643080/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 21bdbc3e0ac2e83aebdf4ed5d685b5451eeeab46fc8ce4a523557df5ff3c8a1c [2023-11-12 02:34:02,082 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:34:02,126 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:34:02,129 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:34:02,131 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:34:02,132 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:34:02,133 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9d9658-14a4-48b6-a7df-bfc580643080/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-5.i [2023-11-12 02:34:05,319 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:34:05,578 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:34:05,587 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9d9658-14a4-48b6-a7df-bfc580643080/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-5.i [2023-11-12 02:34:05,600 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9d9658-14a4-48b6-a7df-bfc580643080/bin/uautomizer-verify-uTZkv6EMXl/data/7de0de36f/a0db03b87689488d9757fa21a3a3ff40/FLAG59309bc47 [2023-11-12 02:34:05,615 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9d9658-14a4-48b6-a7df-bfc580643080/bin/uautomizer-verify-uTZkv6EMXl/data/7de0de36f/a0db03b87689488d9757fa21a3a3ff40 [2023-11-12 02:34:05,618 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:34:05,619 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:34:05,621 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:34:05,621 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:34:05,631 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:34:05,634 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:34:05" (1/1) ... [2023-11-12 02:34:05,636 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59556ed6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:34:05, skipping insertion in model container [2023-11-12 02:34:05,636 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:34:05" (1/1) ... [2023-11-12 02:34:05,709 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:34:05,907 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_9e9d9658-14a4-48b6-a7df-bfc580643080/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-5.i[915,928] [2023-11-12 02:34:06,114 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:34:06,141 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:34:06,156 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_9e9d9658-14a4-48b6-a7df-bfc580643080/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-5.i[915,928] [2023-11-12 02:34:06,234 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:34:06,254 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:34:06,255 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:34:06 WrapperNode [2023-11-12 02:34:06,255 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:34:06,256 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:34:06,256 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:34:06,256 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:34:06,264 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:34:06" (1/1) ... [2023-11-12 02:34:06,291 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:34:06" (1/1) ... [2023-11-12 02:34:06,400 INFO L138 Inliner]: procedures = 26, calls = 80, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 491 [2023-11-12 02:34:06,400 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:34:06,401 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:34:06,405 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:34:06,405 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:34:06,415 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:34:06" (1/1) ... [2023-11-12 02:34:06,416 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:34:06" (1/1) ... [2023-11-12 02:34:06,460 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:34:06" (1/1) ... [2023-11-12 02:34:06,460 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:34:06" (1/1) ... [2023-11-12 02:34:06,493 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:34:06" (1/1) ... [2023-11-12 02:34:06,499 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:34:06" (1/1) ... [2023-11-12 02:34:06,505 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:34:06" (1/1) ... [2023-11-12 02:34:06,511 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:34:06" (1/1) ... [2023-11-12 02:34:06,521 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:34:06,522 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:34:06,522 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:34:06,522 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:34:06,523 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:34:06" (1/1) ... [2023-11-12 02:34:06,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:34:06,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9d9658-14a4-48b6-a7df-bfc580643080/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:34:06,568 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9d9658-14a4-48b6-a7df-bfc580643080/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:34:06,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9d9658-14a4-48b6-a7df-bfc580643080/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:34:06,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:34:06,626 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 02:34:06,626 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 02:34:06,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:34:06,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:34:06,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:34:06,793 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:34:06,795 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:34:07,717 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:34:07,726 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:34:07,726 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 02:34:07,729 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:34:07 BoogieIcfgContainer [2023-11-12 02:34:07,729 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:34:07,732 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:34:07,732 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:34:07,735 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:34:07,735 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:34:05" (1/3) ... [2023-11-12 02:34:07,736 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2669cbfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:34:07, skipping insertion in model container [2023-11-12 02:34:07,736 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:34:06" (2/3) ... [2023-11-12 02:34:07,737 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2669cbfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:34:07, skipping insertion in model container [2023-11-12 02:34:07,737 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:34:07" (3/3) ... [2023-11-12 02:34:07,738 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-250_file-5.i [2023-11-12 02:34:07,757 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:34:07,758 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:34:07,832 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:34:07,840 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;@16b3bbd9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:34:07,841 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:34:07,849 INFO L276 IsEmpty]: Start isEmpty. Operand has 199 states, 129 states have (on average 1.558139534883721) internal successors, (201), 130 states have internal predecessors, (201), 67 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2023-11-12 02:34:07,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2023-11-12 02:34:07,883 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:34:07,884 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:34:07,885 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:34:07,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:34:07,891 INFO L85 PathProgramCache]: Analyzing trace with hash -981896436, now seen corresponding path program 1 times [2023-11-12 02:34:07,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:34:07,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103826428] [2023-11-12 02:34:07,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:07,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:34:08,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:34:08,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:34:08,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103826428] [2023-11-12 02:34:08,362 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-12 02:34:08,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680915122] [2023-11-12 02:34:08,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:08,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:08,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9d9658-14a4-48b6-a7df-bfc580643080/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:34:08,370 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9d9658-14a4-48b6-a7df-bfc580643080/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:34:08,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9d9658-14a4-48b6-a7df-bfc580643080/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:34:08,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:34:08,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 02:34:08,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:34:08,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 8712 trivial. 0 not checked. [2023-11-12 02:34:08,848 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:34:08,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680915122] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:34:08,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:34:08,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:34:08,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627648157] [2023-11-12 02:34:08,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:34:08,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:34:08,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:34:08,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:34:08,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:34:08,914 INFO L87 Difference]: Start difference. First operand has 199 states, 129 states have (on average 1.558139534883721) internal successors, (201), 130 states have internal predecessors, (201), 67 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) Second operand has 2 states, 2 states have (on average 50.5) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (67), 2 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 2 states have call successors, (67) [2023-11-12 02:34:09,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:34:09,019 INFO L93 Difference]: Finished difference Result 391 states and 731 transitions. [2023-11-12 02:34:09,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:34:09,022 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 50.5) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (67), 2 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 2 states have call successors, (67) Word has length 431 [2023-11-12 02:34:09,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:34:09,039 INFO L225 Difference]: With dead ends: 391 [2023-11-12 02:34:09,039 INFO L226 Difference]: Without dead ends: 195 [2023-11-12 02:34:09,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:34:09,054 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:34:09,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:34:09,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-11-12 02:34:09,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2023-11-12 02:34:09,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 126 states have (on average 1.5238095238095237) internal successors, (192), 126 states have internal predecessors, (192), 67 states have call successors, (67), 1 states have call predecessors, (67), 1 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2023-11-12 02:34:09,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 326 transitions. [2023-11-12 02:34:09,140 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 326 transitions. Word has length 431 [2023-11-12 02:34:09,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:34:09,141 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 326 transitions. [2023-11-12 02:34:09,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 50.5) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (67), 2 states have call predecessors, (67), 1 states have return successors, (67), 1 states have call predecessors, (67), 2 states have call successors, (67) [2023-11-12 02:34:09,142 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 326 transitions. [2023-11-12 02:34:09,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2023-11-12 02:34:09,156 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:34:09,156 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:34:09,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9d9658-14a4-48b6-a7df-bfc580643080/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:34:09,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9d9658-14a4-48b6-a7df-bfc580643080/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 02:34:09,371 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:34:09,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:34:09,375 INFO L85 PathProgramCache]: Analyzing trace with hash 2008275296, now seen corresponding path program 1 times [2023-11-12 02:34:09,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:34:09,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058318678] [2023-11-12 02:34:09,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:09,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:34:09,548 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:34:09,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [895977156] [2023-11-12 02:34:09,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:09,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:09,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9d9658-14a4-48b6-a7df-bfc580643080/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:34:09,563 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9d9658-14a4-48b6-a7df-bfc580643080/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:34:09,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9d9658-14a4-48b6-a7df-bfc580643080/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:34:09,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:34:09,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 1023 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:34:09,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:34:10,386 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 3082 proven. 42 refuted. 0 times theorem prover too weak. 5720 trivial. 0 not checked. [2023-11-12 02:34:10,386 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:34:10,834 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 156 proven. 42 refuted. 0 times theorem prover too weak. 8646 trivial. 0 not checked. [2023-11-12 02:34:10,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:34:10,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058318678] [2023-11-12 02:34:10,837 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:34:10,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895977156] [2023-11-12 02:34:10,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895977156] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:34:10,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:34:10,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-12 02:34:10,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299713376] [2023-11-12 02:34:10,838 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:34:10,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:34:10,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:34:10,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:34:10,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:34:10,847 INFO L87 Difference]: Start difference. First operand 195 states and 326 transitions. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 3 states have call successors, (81), 2 states have call predecessors, (81), 4 states have return successors, (82), 3 states have call predecessors, (82), 3 states have call successors, (82) [2023-11-12 02:34:11,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:34:11,527 INFO L93 Difference]: Finished difference Result 393 states and 654 transitions. [2023-11-12 02:34:11,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:34:11,529 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 3 states have call successors, (81), 2 states have call predecessors, (81), 4 states have return successors, (82), 3 states have call predecessors, (82), 3 states have call successors, (82) Word has length 431 [2023-11-12 02:34:11,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:34:11,536 INFO L225 Difference]: With dead ends: 393 [2023-11-12 02:34:11,536 INFO L226 Difference]: Without dead ends: 201 [2023-11-12 02:34:11,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 864 GetRequests, 854 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:34:11,538 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 335 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:34:11,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 615 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 02:34:11,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-11-12 02:34:11,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 199. [2023-11-12 02:34:11,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 129 states have (on average 1.503875968992248) internal successors, (194), 129 states have internal predecessors, (194), 67 states have call successors, (67), 2 states have call predecessors, (67), 2 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2023-11-12 02:34:11,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 328 transitions. [2023-11-12 02:34:11,583 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 328 transitions. Word has length 431 [2023-11-12 02:34:11,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:34:11,586 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 328 transitions. [2023-11-12 02:34:11,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 3 states have call successors, (81), 2 states have call predecessors, (81), 4 states have return successors, (82), 3 states have call predecessors, (82), 3 states have call successors, (82) [2023-11-12 02:34:11,587 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 328 transitions. [2023-11-12 02:34:11,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2023-11-12 02:34:11,596 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:34:11,597 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:34:11,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9d9658-14a4-48b6-a7df-bfc580643080/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:34:11,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9d9658-14a4-48b6-a7df-bfc580643080/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:11,805 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:34:11,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:34:11,806 INFO L85 PathProgramCache]: Analyzing trace with hash 728411618, now seen corresponding path program 1 times [2023-11-12 02:34:11,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:34:11,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077347] [2023-11-12 02:34:11,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:11,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:34:11,949 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:34:11,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1460958530] [2023-11-12 02:34:11,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:11,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:11,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9d9658-14a4-48b6-a7df-bfc580643080/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:34:11,960 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9d9658-14a4-48b6-a7df-bfc580643080/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:34:11,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9d9658-14a4-48b6-a7df-bfc580643080/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:34:12,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:34:12,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 1022 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 02:34:12,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:34:13,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 4723 proven. 117 refuted. 0 times theorem prover too weak. 4004 trivial. 0 not checked. [2023-11-12 02:34:13,475 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:34:14,419 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 81 proven. 117 refuted. 0 times theorem prover too weak. 8646 trivial. 0 not checked. [2023-11-12 02:34:14,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:34:14,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077347] [2023-11-12 02:34:14,420 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:34:14,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460958530] [2023-11-12 02:34:14,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460958530] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:34:14,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:34:14,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2023-11-12 02:34:14,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426849477] [2023-11-12 02:34:14,422 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:34:14,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-12 02:34:14,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:34:14,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-12 02:34:14,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2023-11-12 02:34:14,427 INFO L87 Difference]: Start difference. First operand 199 states and 328 transitions. Second operand has 18 states, 18 states have (on average 8.555555555555555) internal successors, (154), 18 states have internal predecessors, (154), 5 states have call successors, (111), 3 states have call predecessors, (111), 5 states have return successors, (111), 5 states have call predecessors, (111), 5 states have call successors, (111) [2023-11-12 02:34:16,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:34:16,547 INFO L93 Difference]: Finished difference Result 529 states and 873 transitions. [2023-11-12 02:34:16,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-12 02:34:16,549 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 8.555555555555555) internal successors, (154), 18 states have internal predecessors, (154), 5 states have call successors, (111), 3 states have call predecessors, (111), 5 states have return successors, (111), 5 states have call predecessors, (111), 5 states have call successors, (111) Word has length 431 [2023-11-12 02:34:16,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:34:16,556 INFO L225 Difference]: With dead ends: 529 [2023-11-12 02:34:16,557 INFO L226 Difference]: Without dead ends: 333 [2023-11-12 02:34:16,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 872 GetRequests, 845 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=197, Invalid=615, Unknown=0, NotChecked=0, Total=812 [2023-11-12 02:34:16,562 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 1016 mSDsluCounter, 2041 mSDsCounter, 0 mSdLazyCounter, 1596 mSolverCounterSat, 462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1043 SdHoareTripleChecker+Valid, 2322 SdHoareTripleChecker+Invalid, 2058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 462 IncrementalHoareTripleChecker+Valid, 1596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-12 02:34:16,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1043 Valid, 2322 Invalid, 2058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [462 Valid, 1596 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-12 02:34:16,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2023-11-12 02:34:16,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 324. [2023-11-12 02:34:16,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 225 states have (on average 1.5244444444444445) internal successors, (343), 226 states have internal predecessors, (343), 94 states have call successors, (94), 4 states have call predecessors, (94), 4 states have return successors, (94), 93 states have call predecessors, (94), 94 states have call successors, (94) [2023-11-12 02:34:16,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 531 transitions. [2023-11-12 02:34:16,628 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 531 transitions. Word has length 431 [2023-11-12 02:34:16,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:34:16,630 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 531 transitions. [2023-11-12 02:34:16,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.555555555555555) internal successors, (154), 18 states have internal predecessors, (154), 5 states have call successors, (111), 3 states have call predecessors, (111), 5 states have return successors, (111), 5 states have call predecessors, (111), 5 states have call successors, (111) [2023-11-12 02:34:16,631 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 531 transitions. [2023-11-12 02:34:16,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2023-11-12 02:34:16,635 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:34:16,636 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:34:16,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9d9658-14a4-48b6-a7df-bfc580643080/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-12 02:34:16,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9d9658-14a4-48b6-a7df-bfc580643080/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:16,845 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:34:16,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:34:16,846 INFO L85 PathProgramCache]: Analyzing trace with hash 310441422, now seen corresponding path program 1 times [2023-11-12 02:34:16,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:34:16,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127185996] [2023-11-12 02:34:16,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:16,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:34:16,921 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:34:16,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1689522663] [2023-11-12 02:34:16,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:16,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:16,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9d9658-14a4-48b6-a7df-bfc580643080/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:34:16,923 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9d9658-14a4-48b6-a7df-bfc580643080/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:34:16,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9d9658-14a4-48b6-a7df-bfc580643080/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:34:17,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:34:17,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 02:34:17,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:34:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 3366 proven. 48 refuted. 0 times theorem prover too weak. 5430 trivial. 0 not checked. [2023-11-12 02:34:18,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:34:19,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 150 proven. 48 refuted. 0 times theorem prover too weak. 8646 trivial. 0 not checked. [2023-11-12 02:34:19,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:34:19,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127185996] [2023-11-12 02:34:19,108 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:34:19,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689522663] [2023-11-12 02:34:19,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689522663] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:34:19,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:34:19,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-12 02:34:19,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401091095] [2023-11-12 02:34:19,111 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:34:19,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 02:34:19,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:34:19,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 02:34:19,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-12 02:34:19,115 INFO L87 Difference]: Start difference. First operand 324 states and 531 transitions. Second operand has 14 states, 14 states have (on average 13.785714285714286) internal successors, (193), 14 states have internal predecessors, (193), 4 states have call successors, (134), 3 states have call predecessors, (134), 5 states have return successors, (134), 4 states have call predecessors, (134), 4 states have call successors, (134) [2023-11-12 02:34:25,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:34:25,230 INFO L93 Difference]: Finished difference Result 3486 states and 5591 transitions. [2023-11-12 02:34:25,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-12 02:34:25,231 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.785714285714286) internal successors, (193), 14 states have internal predecessors, (193), 4 states have call successors, (134), 3 states have call predecessors, (134), 5 states have return successors, (134), 4 states have call predecessors, (134), 4 states have call successors, (134) Word has length 432 [2023-11-12 02:34:25,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:34:25,260 INFO L225 Difference]: With dead ends: 3486 [2023-11-12 02:34:25,260 INFO L226 Difference]: Without dead ends: 3165 [2023-11-12 02:34:25,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 900 GetRequests, 856 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=568, Invalid=1502, Unknown=0, NotChecked=0, Total=2070 [2023-11-12 02:34:25,269 INFO L413 NwaCegarLoop]: 805 mSDtfsCounter, 2556 mSDsluCounter, 2913 mSDsCounter, 0 mSdLazyCounter, 2769 mSolverCounterSat, 1190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2706 SdHoareTripleChecker+Valid, 3718 SdHoareTripleChecker+Invalid, 3959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1190 IncrementalHoareTripleChecker+Valid, 2769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-11-12 02:34:25,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2706 Valid, 3718 Invalid, 3959 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1190 Valid, 2769 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2023-11-12 02:34:25,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3165 states. [2023-11-12 02:34:25,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3165 to 1786. [2023-11-12 02:34:25,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1786 states, 1154 states have (on average 1.4263431542461005) internal successors, (1646), 1165 states have internal predecessors, (1646), 603 states have call successors, (603), 28 states have call predecessors, (603), 28 states have return successors, (603), 592 states have call predecessors, (603), 603 states have call successors, (603) [2023-11-12 02:34:25,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 2852 transitions. [2023-11-12 02:34:25,755 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 2852 transitions. Word has length 432 [2023-11-12 02:34:25,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:34:25,757 INFO L495 AbstractCegarLoop]: Abstraction has 1786 states and 2852 transitions. [2023-11-12 02:34:25,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.785714285714286) internal successors, (193), 14 states have internal predecessors, (193), 4 states have call successors, (134), 3 states have call predecessors, (134), 5 states have return successors, (134), 4 states have call predecessors, (134), 4 states have call successors, (134) [2023-11-12 02:34:25,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 2852 transitions. [2023-11-12 02:34:25,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2023-11-12 02:34:25,762 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:34:25,763 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:34:25,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9d9658-14a4-48b6-a7df-bfc580643080/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:34:25,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9d9658-14a4-48b6-a7df-bfc580643080/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:25,971 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:34:25,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:34:25,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1128089872, now seen corresponding path program 1 times [2023-11-12 02:34:25,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:34:25,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965618953] [2023-11-12 02:34:25,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:25,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:34:26,079 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:34:26,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1941267769] [2023-11-12 02:34:26,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:26,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:26,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9d9658-14a4-48b6-a7df-bfc580643080/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:34:26,082 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9d9658-14a4-48b6-a7df-bfc580643080/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:34:26,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9d9658-14a4-48b6-a7df-bfc580643080/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:34:26,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:34:26,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 1022 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 02:34:26,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:34:27,528 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 4332 proven. 117 refuted. 0 times theorem prover too weak. 4395 trivial. 0 not checked. [2023-11-12 02:34:27,529 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:34:28,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 81 proven. 117 refuted. 0 times theorem prover too weak. 8646 trivial. 0 not checked. [2023-11-12 02:34:28,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:34:28,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965618953] [2023-11-12 02:34:28,397 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:34:28,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941267769] [2023-11-12 02:34:28,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941267769] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:34:28,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:34:28,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2023-11-12 02:34:28,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041696170] [2023-11-12 02:34:28,399 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:34:28,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-12 02:34:28,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:34:28,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-12 02:34:28,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-11-12 02:34:28,404 INFO L87 Difference]: Start difference. First operand 1786 states and 2852 transitions. Second operand has 16 states, 16 states have (on average 10.8125) internal successors, (173), 16 states have internal predecessors, (173), 4 states have call successors, (134), 3 states have call predecessors, (134), 5 states have return successors, (134), 4 states have call predecessors, (134), 4 states have call successors, (134) [2023-11-12 02:34:30,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:34:30,877 INFO L93 Difference]: Finished difference Result 6088 states and 9756 transitions. [2023-11-12 02:34:30,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:34:30,884 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 10.8125) internal successors, (173), 16 states have internal predecessors, (173), 4 states have call successors, (134), 3 states have call predecessors, (134), 5 states have return successors, (134), 4 states have call predecessors, (134), 4 states have call successors, (134) Word has length 432 [2023-11-12 02:34:30,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:34:30,924 INFO L225 Difference]: With dead ends: 6088 [2023-11-12 02:34:30,924 INFO L226 Difference]: Without dead ends: 4305 [2023-11-12 02:34:30,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 869 GetRequests, 848 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-11-12 02:34:30,935 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 849 mSDsluCounter, 2559 mSDsCounter, 0 mSdLazyCounter, 1685 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 942 SdHoareTripleChecker+Valid, 2897 SdHoareTripleChecker+Invalid, 1950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 1685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-12 02:34:30,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [942 Valid, 2897 Invalid, 1950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 1685 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-12 02:34:30,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4305 states. [2023-11-12 02:34:31,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4305 to 2940. [2023-11-12 02:34:31,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2940 states, 1845 states have (on average 1.4048780487804877) internal successors, (2592), 1861 states have internal predecessors, (2592), 1044 states have call successors, (1044), 50 states have call predecessors, (1044), 50 states have return successors, (1044), 1028 states have call predecessors, (1044), 1044 states have call successors, (1044) [2023-11-12 02:34:31,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2940 states to 2940 states and 4680 transitions. [2023-11-12 02:34:31,815 INFO L78 Accepts]: Start accepts. Automaton has 2940 states and 4680 transitions. Word has length 432 [2023-11-12 02:34:31,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:34:31,822 INFO L495 AbstractCegarLoop]: Abstraction has 2940 states and 4680 transitions. [2023-11-12 02:34:31,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 10.8125) internal successors, (173), 16 states have internal predecessors, (173), 4 states have call successors, (134), 3 states have call predecessors, (134), 5 states have return successors, (134), 4 states have call predecessors, (134), 4 states have call successors, (134) [2023-11-12 02:34:31,823 INFO L276 IsEmpty]: Start isEmpty. Operand 2940 states and 4680 transitions. [2023-11-12 02:34:31,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2023-11-12 02:34:31,829 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:34:31,829 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:34:31,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9d9658-14a4-48b6-a7df-bfc580643080/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:34:32,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9d9658-14a4-48b6-a7df-bfc580643080/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:32,038 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:34:32,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:34:32,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1197968002, now seen corresponding path program 1 times [2023-11-12 02:34:32,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:34:32,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663110100] [2023-11-12 02:34:32,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:32,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:34:32,100 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:34:32,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1341850279] [2023-11-12 02:34:32,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:32,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:32,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9d9658-14a4-48b6-a7df-bfc580643080/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:34:32,102 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9d9658-14a4-48b6-a7df-bfc580643080/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:34:32,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9d9658-14a4-48b6-a7df-bfc580643080/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:34:32,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:34:32,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 1026 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-12 02:34:32,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:34:35,014 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 4113 proven. 252 refuted. 0 times theorem prover too weak. 4479 trivial. 0 not checked. [2023-11-12 02:34:35,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:34:40,205 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 138 proven. 255 refuted. 0 times theorem prover too weak. 8451 trivial. 0 not checked. [2023-11-12 02:34:40,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:34:40,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663110100] [2023-11-12 02:34:40,206 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:34:40,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341850279] [2023-11-12 02:34:40,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341850279] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:34:40,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:34:40,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2023-11-12 02:34:40,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801015900] [2023-11-12 02:34:40,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:34:40,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-12 02:34:40,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:34:40,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-12 02:34:40,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=691, Unknown=0, NotChecked=0, Total=930 [2023-11-12 02:34:40,215 INFO L87 Difference]: Start difference. First operand 2940 states and 4680 transitions. Second operand has 31 states, 30 states have (on average 6.4) internal successors, (192), 29 states have internal predecessors, (192), 6 states have call successors, (134), 4 states have call predecessors, (134), 7 states have return successors, (134), 6 states have call predecessors, (134), 6 states have call successors, (134)